AIR PUMP
An air pump has a main frame, at least one pressure cylinder, a footboard, a torsion spring, a holding device, an outlet device, and an inflating tube. The main frame has a first connecting shaft, a pivot shaft, and a second connecting shaft. The at least one pressure cylinder is mounted in the main frame, and each one of the at least one pressure cylinder has a cylinder and a cylinder axis. The footboard is connected to the pivot shaft. The torsion spring is mounted around the pivot shaft and is pressed against the footboard and the first connecting shaft. The holding device is connected to the main frame and the at least one pressure cylinder, and has multiple first holding elements. The outlet device is mounted in the main frame and is connected to the at least one pressure cylinder. The inflating tube is connected to the outlet tube and is held with the holding device.
1. Field of the Invention
The present invention relates to an air pump, and more particularly relates to an air pump having a tube holding device. The air pump can be used to hold an inflating tube of the air pump with the air pump conveniently and securely.
2. Description of Related Art
A conventional air pump has a main frame, at least one pressure cylinder, a footboard, an outlet device, a pressure gauge, an inflating tube, and a gas nozzle. The at least one pressure cylinder is mounted on the main frame and each one of the at least one pressure cylinder has a cylinder and a cylinder axis. The footboard is pivotally connected to the main frame and is securely connected to the cylinder of the at least one pressure cylinder. The outlet device is connected to and communicates with the at least one pressure cylinder and has an outlet tube. The pressure gauge is mounted on the outlet device. The inflating tube is mounted around the outlet tube of the outlet device and is connected to the gas nozzle.
When a user wants to put the conventional air pump in storage, the inflating tube is wound around the main frame and the footboard. However, the wound inflating tube is not tightly fixed on the main frame and the footboard and the winding may go loose, and hence the inflating tube cannot be held securely with the main frame. This is inconvenient both in use and in storage.
The invention provides an air pump to mitigate or obviate the aforementioned problems.
SUMMARY OF THE INVENTIONThe main objective of the present invention is to provide an air pump having a tube holding device, such that the air pump can be used to hold an inflating tube of the air pump with the air pump conveniently and securely.
The air pump in accordance with the present invention has a main frame, at least one pressure cylinder, a footboard, a torsion spring, a holding device, an outlet device, and an inflating tube. The main frame has a first connecting shaft, a pivot shaft, and a second connecting shaft. The at least one pressure cylinder is mounted in the main frame, and each has a cylinder and a cylinder axis. The footboard is connected to the pivot shaft. The torsion spring is mounted around the pivot shaft and is pressed against the footboard and the first connecting shaft. The holding device is connected to the main frame and the at least one pressure cylinder and has multiple first holding elements. The outlet device is mounted in the main frame and is connected to the at least one pressure cylinder. The inflating tube is connected to the outlet tube and is held with the holding device.
Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
With reference to
The main frame 10 has a front end, a rear end, a first connecting shaft 11, a pivot shaft 12 and a second connecting shaft 13. The pivot shaft 12 is transversally connected to the front end of the main frame 10. The first connecting shaft 11 is transversally connected to the main frame 10 proximal to the front end of the main frame 10 and is parallel with the pivot shaft 12. The second connecting shaft 13 is transversally connected to the main frame 10 proximal to the rear end of the main frame 10.
The at least one pressure cylinder 20 is mounted in the main frame 10, and each one of the at least one pressure cylinder 20 has a cylinder 21 and a cylinder axis 22. The cylinder 21 is movably mounted in the main frame 10. The cylinder axis 22 is connected to the cylinder 21, is connected securely to the second connecting shaft 13, and has an inner end and an outer end. The inner end of the cylinder axis 22 is mounted in the cylinder 21. The outer end of the cylinder axis 22 is securely connected to the second connecting shaft 13 of the main frame 10. Preferably, the air pump has two pressure cylinders 20 mounted in the main frame 10 at an interval.
The footboard 30 is connected to the pivot shaft 12 of the main frame 10 to enable the footboard 30 to rotate relative to the main frame 10, is securely connected to the cylinder 21 of the at least one pressure cylinder 20, and has a positioning shaft 31. The positioning shaft 31 is rotatably connected to the main frame 10 proximal to the second connecting shaft 13 and selectively engages with the footboard 30.
The at least one torsion spring 40 is mounted around the pivot shaft 12 of the main frame 10, and each one of the at least one torsion spring 40 has two ends. The ends of each one of the at least one torsion spring 40 are each respectively pressed against the footboard 30 and the first connecting shaft 11 of the main frame 10.
The holding device 50 is connected to the main frame 10 and the at least one pressure cylinder 20, and has multiple first holding elements 51 and at least one second holding element 60.
With reference to
With further reference to
With reference to
According to the above-mentioned features, the air pump in accordance with the present invention can be used to hold the inflating tube 80 with the main frame 10 in an annular configuration securely and conveniently by mounting the inflating tube in the holding recesses 53, 62 of the holding elements 51, 60 of the holding device 50.
Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Claims
1. An air pump comprising:
- a main frame having: a front end; a rear end; a pivot shaft transversally connected to the front end of the main frame;
- a first connecting shaft transversally connected to the main frame proximal to the front end of the main frame and being parallel with the pivot shaft; and
- a second connecting shaft transversally connected to the main frame proximal to the rear end of the main frame;
- at least one pressure cylinder mounted in the main frame, and each one of the at least one pressure cylinder having a cylinder movably mounted in the main frame; and a cylinder axis connected to the cylinder, connected securely to the second connecting shaft, and having an inner end mounted in the cylinder; and an outer end securely connected to the second connecting shaft of the main frame;
- a footboard connected to the pivot shaft of the main frame to enable the footboard to rotate relative to the main frame and to be securely connected to the cylinder of the at least one pressure cylinder;
- at least one torsion spring mounted around the pivot shaft of the main frame, and each one of the at least one torsion spring having two ends each respectively pressed against the footboard and the first connecting shaft of the main frame;
- a holding device connected to the main frame and having multiple first holding elements, and each first holding element having a first body securely mounted on the first connecting shaft and having a top; a bottom; a front side; and a first holding recess formed in the bottom of the first body;
- an outlet device mounted in the main frame, connected to the at least one pressure cylinder, and communicating with the cylinder of the at least one pressure cylinder, and the outlet device having an outlet tube extending over the first connecting shaft; and
- an inflating tube connected to the outlet tube, mounted in the main frame, and held with the holding device, and the inflating tube having a connecting end mounted around the outlet tube of the outlet device and communicating with the cylinder of the at least one pressure cylinder via the outlet device; and an inlet end extending across the pivot shaft and extending through the holding recesses of the first holding elements to enable the inflating tube to be held in the main frame in an annular configuration by the holding device.
2. The air pump as claimed in claim 1, wherein the first body of each one of the first holding elements has a first assembling recess formed in the top of the first body and mounted around the first connecting shaft.
3. The air pump as claimed in claim 2, wherein each first holding element has an auxiliary arm formed on and protruding from the front side of the first body of the corresponding first holding element, and the auxiliary arm having:
- a free end extending below the pivot shaft between the main frame and the footboard, and having a top surface; and
- a locating recess formed in the top surface of the free end of the auxiliary arm and mounted around the pivot shaft to prevent the first holding element from rotating relative to the main frame.
4. The air pump as claimed in claim 1, wherein the holding device has at least one second holding element mounted around the second connecting shaft of the main frame, and each one of the at least one second holding element having:
- a second body being S-shaped and having a top; a bottom; a front side; a rear side; and a second holding recess formed in the rear side of the second body proximal to the bottom of the second body to hold the inflating tube with the main frame.
5. The air pump as claimed in claim 2, wherein the holding device has at least one second holding element mounted around the second connecting shaft of the main frame, and each one of the at least one second holding element having:
- a second body being S-shaped and having a top; a bottom; a front side; a rear side; and a second holding recess formed in the rear side of the second body proximal to the bottom of the second body to hold the inflating tube with the main frame.
6. The air pump as claimed in claim 3, wherein the holding device has at least one second holding element mounted around the second connecting shaft of the main frame, and each one of the at least one second holding element having:
- a second body being S-shaped and having a top; a bottom; a front side; a rear side; and a second holding recess formed in the rear side of the second body proximal to the bottom of the second body to hold the inflating tube with the main frame.
7. The air pump as claimed in claim 4, wherein the second body of each one of the at least one second holding element has
- a second assembling recess formed in the front side of the second body proximal to the top of the second body above the second holding recess, and mounted around the second connecting shaft of the main frame; and
- a connecting hole formed through the rear side of the second body, communicating with the second assembling hole, and mounted around the cylinder axis of the at least one pressure cylinder.
8. The air pump as claimed in claim 5, wherein the second body of each one of the at least one second holding element has
- a second assembling recess formed in the front side of the second body to the top of the second body above the second holding recess, and mounted around the second connecting shaft of the main frame; and
- a connecting hole formed through the rear side of the second body, communicating with the second assembling hole, and mounted around the cylinder axis of the at least one pressure cylinder.
9. The air pump as claimed in claim 6, wherein the second body of each one of the at least one second holding element has
- a second assembling recess formed in the front side of the second body proximal to the top of the second body above the second holding recess, and mounted around the second connecting shaft of the main frame; and
- a connecting hole formed through the rear side of the second body, communicating with the second assembling hole, and mounted around the cylinder axis of the at least one pressure cylinder.
Type: Application
Filed: Mar 15, 2013
Publication Date: Sep 18, 2014
Inventor: Wei-Chi WANG (Tainan City)
Application Number: 13/835,460