Telescoping support bars for portable display systems
A portable display frame includes a support frame and improved telescoping support bars. Each of the improved telescoping support bars includes a pass-through engaging slot on a first telescoping support bar section and an easily replaceable attachment projection member on a last telescoping support bar section. Known support bars require flexing the support bar to pass a closed end engaging slot on the first telescoping support bar section past a middle engaging hub, often resulting in damage to the telescoping support bar. The pass-through engaging slot of the present invention passes over the middle engaging hub without requiring flexing. Further, attachment projections on known support bars have broken and required time consuming repair or replacement of the support bar, often at an inconvenient time and location. The replaceable attachment projection member allows simple and easy repair when the attachment projections break.
The present invention relates to elements of portable displays and in particular to an improved telescoping support bar which reduces the likelihood of damage during assembly.
Portable display frames are used commonly for displays used in business presentations and trade shows. Generally, display panels are attached to the portable display frames. The portable display frames are made to be light weight, to allow fast assembly, and to be easily transportable, for example, by car or aircraft. Because the portable display frames are often assembled on-site by a salesman or presenter, the assembly should be simple and require little to no instruction. Because a presenter or salesman may not have assistance in the transport and/or assembly of the portable display frames, and may only have a brief time to assemble the portable display frames, ease of assembly is an important feature. The presentation may also be adversely affected if the display appears flimsy or is not squared with the floor and/or walls. As a result, it is important that the portable display frames are sturdy and may be properly assembled with little instruction or assistance.
A portable display frame is described in U.S. Pat. No. 5,501,051 for “PORTABLE DISPLAY FRAME WITH TELESCOPING SUPPORT BARS.” The portable display frame of the '051 patent provides a portable display frame which is easy and quick to assemble, sturdy and portable. The portable display of the '051 patent includes a support frame, vertical support bars attached to the support frame, and display panels attached to the vertical support bars. The vertical support bars each comprise a plurality of individual bars which telescope into one another for ease of storage and transport. As the bars are telescopically expanded, unique connection pieces cause each of the inner bars to snap forward to provide a smooth support surface for the display panels disposed in a single plane. The '051 patent is herein incorporated by reference.
Unfortunately, use of the portable display frame of the '051 patent has demonstrated two weaknesses. A pair of attachment projections 98 at the top of the vertical support bars have broken. Because the attachment projections are an integral part of the third (or top) bar 50 of the vertical support bars, the entire third bar must be replaced, and is often unavailable when needed. Additionally, the engagement of the first (or bottom) bar 12 to the support frame requires that the first bar be pulled away from the support frame after the second and third bars have been engaged. Such pulling away has resulted in breaking or bending some vertical support bars which are constructed to have minimum weight. Either damage described above may present a major problem at a trade show or any presentation where a professional presentation is of vital importance, and replacement parts may not be available locally.
BRIEF SUMMARY OF THE INVENTIONThe present invention addresses the above and other needs by providing a portable display frame which includes a support frame and improved telescoping support bars. Each of the improved telescoping support bars includes a pass-through engaging slot on a first telescoping support bar section and an easily replaceable attachment projection member on a last telescoping support bar section. Known support bars require flexing the support bar to pass a closed end engaging slot on the first telescoping support bar section past a middle engaging hub, often resulting in damage to the telescoping support bar. The pass-through engaging slot of the present invention passes over the middle engaging hub without requiring flexing. Further, attachment projections on known support bars have broken and required time consuming repair or replacement of the support bar, often at an inconvenient time and location. The replaceable attachment projection member allows simple and easy repair when the attachment projections break.
In accordance with one aspect of the invention, there is provided a portable display frame having an improved telescoping vertical support bar. The display frame comprises a support frame and telescoping vertical support bars. The support frame includes horizontally spaced apart sets of vertically spaced apart engaging hubs on a support frame front. The telescoping vertical support bars include a bottom telescoping support bar section and a top telescoping support bar section, the support bar sections having a rear face and a front face. Vertically spaced apart engaging slots reside on the rear face of the support bar members, the engaging slots are shaped to receive the engaging hubs to attach the support bars to the support frame. The engaging slots comprise a pass-through engaging slot residing on each bottom telescoping support bar member and a closed end engaging slot residing on each top telescoping support bar member. A removable and replaceable attachment projection member includes attachment projections and resides on the front face of the support bars for attaching panel boards to the front faces of the support bars.
The above and other aspects, features and advantages of the present invention will be more apparent from the following more particular description thereof, presented in conjunction with the following drawings wherein:
Corresponding reference characters indicate corresponding components throughout the several views of the drawings.
DETAILED DESCRIPTION OF THE INVENTIONThe following description is of the best mode presently contemplated for carrying out the invention. This description is not to be taken in a limiting sense, but is made merely for the purpose of describing one or more preferred embodiments of the invention. The scope of the invention should be determined with reference to the claims.
A portable display system 20 including display panels 30 mounted to improved telescoping vertical support bars 10 according to the present invention is shown attached to a support frame 100 in
While telescoping vertical support bars are shown in
A perspective view of the improved telescoping vertical support bar 10 is shown in
An attachment projection member 60 (see
A front view of the bottom telescoping support bar section 12 of the improved telescoping vertical support bar 10 is shown in
Known support bars, for example as described in U.S. Pat. No. 5,501,051 for “PORTABLE DISPLAY FRAME WITH TELESCOPING SUPPORT BARS” (incorporated by reference above), include several (typically four for a three section support bar) engaging slots. When the support bar 10 is extended for use, the engaging slots are generally in the same vertical plane to allow the support bar 10 to reside against the support frame front 100a (see
The engaging slot 18a includes a tapered mouth portion to align the engaging slot 18a with the lug 120a and a narrow straight portion to engage the engaging slot 18a with the lug 120a. Further, the improved support bar 10 of the present invention includes a bottom engaging slot 18a which is a pass-through engaging slot (i.e., the narrow straight portion is open ended as seen in
A front view of the middle telescoping support bar section 14 of the improved telescoping vertical support bar 10 is shown in
The engaging slot member 40 is preferably similarly biased away from the seat 23b. The bottom engaging slot member 30 further includes hands 33 for engaging slots 25a along sides of the engaging slot member seat 23a to help position the bottom engaging slot member 30 in the engaging slot member seat 23a. The middle telescoping support bar section 14 includes a second support bar mouth 20b for receiving the top telescoping support bar 16 and is preferably made from a stiff material providing low friction, for example, glass filled polypropylene or Acrylonitrile Butadiene Styrene (ABS).
A front view of the top telescoping support bar section 16 of the improved telescoping vertical support bar 10 is shown in
The top telescoping support bar section 16 further includes a third engaging slot member seat 23c for a top engaging slot member 50 (see
A front perspective view of a preferred engaging hub 120 representing engaging hubs 120a, 120b, and 120c (see
The engaging hub 120 requires a modification to the engaging slots to provide an upward assembly of the support bars to the support frame.
A front view of a lower engaging slot member 30 of the improved telescoping vertical support bar 10 is shown in
A front view of a middle engaging slot member 40 of the improved telescoping vertical support bar 10 is shown in
A front view of an upper engaging slot member 50 of the improved telescoping vertical support bar 10 is shown in
A front view of an attachment projection member 60 of the improved telescoping vertical support bar 10 is shown in
While the invention herein disclosed has been described by means of specific embodiments and applications thereof, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope of the invention set forth in the claims.
Claims
1. A portable display frame comprising:
- a support frame having a two dimensional array of spaced apart engaging hubs on a support frame front;
- support bars having a front face and a rear face, each support bar including: a first support bar section having a first front face and a first rear face; and a last support bar section having a last front face and a last rear face, the last support bar section cooperating with the first support bar sections to form the support bar;
- longitudinally spaced apart engaging slots on the first and last rear face of each corresponding first and last support bar section, the engaging slots shaped to receive the engaging hubs to attach the support bars to the support frame, the engaging slots including: an open end pass-through engaging slot residing on each first support bar section; and a closed end engaging slot residing on each last support bar section; and
- attachment projections residing on the front face of the support bars for attaching panel boards to the display frame.
2. The portable display frame of claim 1, wherein one of the pass-through engaging slots resides on each first support bar section proximal to an end opposite the last support bar section.
3. The portable display frame of claim 2, wherein one of the pass-through engaging slots is molded into each first support bar section.
4. The portable display frame of claim 2, wherein the pass-through engaging slot includes a longitudinally narrowing tapered portion to guide the pass-through engaging slots into the engaging hubs and a narrow straight portion for engaging the engaging hubs to position each support bar laterally on the support frame.
5. The portable display frame of claim 2, wherein two of the closed end engaging slots reside proximal to opposite ends on each last support bar section.
6. The portable display frame of claim 1, wherein the support bars include a removable and replaceable attachment projection member and the attachment projections reside on the attachment projection member.
7. The portable display frame of claim 6, wherein the support bars are vertical support bars and the attachment projection member resides on the last support bar section proximal to a top end of the last support bar section.
8. The portable display frame of claim 1, wherein:
- the support bars are telescoping support bars;
- the first support bar section is a first telescoping support bar section; and
- the last support bar section is a last telescoping support bar section.
9. The portable display frame of claim 8, wherein:
- the telescoping support bars are vertical telescoping support bars;
- the first telescoping support bar sections are bottom vertical telescoping support bar sections; and
- the last telescoping support bar sections are top telescoping support bar sections.
10. The portable display frame of claim 9, wherein each top telescoping support bar section includes a removable and replaceable attachment projection member proximal to the top of each top telescoping support bar section and the attachment projections reside on each attachment projection member.
11. The portable display frame of claim 9, further including middle telescoping support bar sections telescopingly residing between the bottom telescoping support bar sections and the top telescoping support bar sections.
12. The portable display frame of claim 11, wherein:
- one of the pass through engaging slots resides proximal to the bottom of each bottom telescoping support bar section;
- one of the closed end engaging slots resides proximal to the bottom of each middle telescoping support bar section;
- one of the closed end engaging slots resides proximal to the bottom of each top telescoping support bar section; and
- one of the closed end engaging slots resides proximal to the top of each top telescoping support bar section.
13. A portable display frame comprising:
- a support frame having horizontally spaced apart sets of vertically spaced apart engaging hubs on a support frame front;
- telescoping vertical support bars having a rear face and a front face;
- bottom telescoping vertical support bar sections of the telescoping vertical support bars;
- top telescoping vertical support bar sections of the telescoping vertical support bars telescopingly cooperating with the bottom telescoping vertical support bar sections;
- vertically spaced apart engaging slots on the rear face of the telescoping vertical support bars, the engaging slots shaped to receive the engaging hubs to attach the support bars to the support frame, the engaging slots including: open ended bottom engaging slots residing proximal to the bottoms of the bottom telescoping vertical support bar sections of the telescoping vertical support bars, the bottom engaging slots comprising pass-through engaging slots allowing the hubs to pass vertically through the bottom engaging slots and horizontally capturing the hubs residing in the bottom engaging slots; and two closed end engaging slots residing on opposite ends of the top telescoping vertical support bar sections, the closed ends horizontally and vertically capturing the hubs which enter the closed end engaging slots; and
- a removable and replaceable attachment projection member residing on the front face of the support bars for attaching panel boards to the front faces of the support bars.
14. The portable display frame of claim 13, wherein attachment projections are attached to the attachment projection member for attaching the panel boards.
15. A portable display frame comprising:
- a support frame having horizontally spaced apart sets of vertically spaced apart engaging hubs on a support frame front;
- telescoping vertical support bars, each telescoping vertical support bar including: a bottom telescoping support bar section; a middle telescoping support section; and a top telescoping support bar section, each support bar section having a rear face and a front face;
- vertically spaced apart engaging slots on the rear faces of the support bar sections, the engaging slots shaped to receive the engaging hubs to attach the support bars to the support frame, the engaging slots comprising: an open end pass-through engaging slot residing proximal to the bottom on each bottom telescoping support bar section; and a closed end engaging slot residing proximal to the bottom on each middle telescoping support bar section; a closed end engaging slots residing proximal to the bottom of each top telescoping support bar section; a closed end engaging slots residing proximal to the top of each top telescoping support bar section; and
- a removable and replaceable attachment projection section including attachment projections and residing on the front face of each top telescoping support bar section, the attachment projections for attaching panel boards to the display frame.
Type: Application
Filed: Feb 23, 2007
Publication Date: Aug 28, 2008
Inventor: Mark Bartholomew (Chino Hills, CA)
Application Number: 11/710,021
International Classification: A47G 29/02 (20060101);