Foot rod device with linkage stretching function

Abstract

The invention discloses a foot rod device with a linkage stretching function. The foot rod device comprises a limiting frame, at least three telescopic pipe groups and at least three foot seats, the telescopic pipe set is arranged on the limiting frame in a penetrating mode, extends in the telescopic direction and can stretch out and draw back in the telescopic direction. The footstands are arranged at the tail end of the telescopic pipe set and are adjacent to each other, each footstand comprises a body arranged at the tail end of the telescopic pipe set, a clamping block extending from the body to one adjacent footstand and a clamping groove formed in the body, and a concave opening of the clamping groove faces the other adjacent footstand. When the telescopic pipe set stretches out and draws back in the stretching-out and drawing-back direction, the clamping block of each foot stand is clamped in the clamping groove of one adjacent foot stand. Therefore, the time consumed for extending and retracting the telescopic pipe group can be reduced, and the convenience in use is greatly improved.

Description

Technical Field

[0001] The invention relates to a bracket device, in particular to a foot rod device with a linked stretching function. Background Art

[0002] Some items (such as folding chairs, measuring instruments, cameras, etc.) need to be raised to a height using a stand with multiple legs to facilitate user operation, but when stored, the stand often takes up a lot of space. Therefore, a structure with retractable legs has been developed. When in use, the legs are extended to provide a height-raising function, and when used, the legs are shortened to save storage space. However, in the process of extending and shortening, the legs need to be extended and shortened one by one, which increases the time for taking and storing, resulting in inconvenience in use. Summary of the invention

[0003] The object of the present invention is to provide a foot rod device with a linked stretching function which can improve the convenience of use.

[0004] The foot rod device with linked stretching function of the present invention comprises a limit frame, at least three telescopic tube groups, and at least three foot seats.

[0005] The telescopic tube groups are arranged in intervals on the limiting frame, and each of the telescopic tube groups extends along a telescopic direction and can be telescoped along the telescopic direction.

[0006] The feet are respectively arranged at the ends of the telescopic tube groups and are adjacent to each other. Each foot includes a body arranged at the end of the corresponding telescopic tube group, a clamping block extending from the body toward one of the adjacent feet, and a clamping groove formed on the body and with a recessed opening toward another adjacent foot. When the telescopic tube group is extended and retracted along the telescopic direction, the clamping block of each foot is clamped into the clamping groove of one of the adjacent feet, and the clamping groove of each foot accommodates the clamping block of another adjacent foot.

[0007] In the foot rod device with linked stretching function described in the present invention, the engaging block and the engaging groove of each foot seat have the same position in the telescopic direction.

[0008] In the foot rod device with linked stretching function described in the present invention, the body of each foot seat has a groove bottom surface defining the groove bottom of the engaging groove, and the engaging block has a supporting surface capable of supporting against the groove bottom surface.

[0009] In the foot rod device with linked stretching function described in the present invention, the engaging groove of each foot seat has a moving-out port in the radial direction of the telescopic direction for allowing the engaging block of another adjacent foot seat to move out.

[0010] In the foot rod device with linked stretching function of the present invention, the engaging block of each foot seat is adjacent to the engaging groove and is in a stepped shape along the telescopic direction.

[0011] In the foot rod device with linked stretching function of the present invention, the direction in which the engaging block of each foot seat extends from the body is at right angles to the surface of the body.

[0012] In the foot rod device with linked stretching function of the present invention, the body of each foot seat has an inclined surface located at one end away from the telescopic tube group.

[0013] In the foot rod device with linked stretching function described in the present invention, each of the telescopic tube groups comprises an outer tube penetrating the limit frame, and an inner tube penetrating the outer tube and capable of moving relative to the outer tube along the telescopic direction.

[0014] The beneficial effect of the present invention is that by providing the engaging block and the corresponding engaging groove on each of the foot seats, when the telescopic tube set is extended and retracted along the telescopic direction, the engaging block of each foot seat is engaged with the engaging groove of one of the adjacent foot seats, and the engaging groove of each foot seat accommodates the engaging block of another adjacent foot seat, and the engaging block and the corresponding engaging groove are engaged, so that the foot seats become a mutually linked structure. In this way, the time spent by the user to extend and retract the telescopic tube set can be reduced, and the convenience of use can be greatly increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the foot rod device with a linked stretching function of the present invention applied to a folding chair with its telescopic tube assembly in a storage state;

[0016] Figure 2 is a three-dimensional schematic diagram of the telescopic tube assembly of the embodiment in a stretched state;

[0017] Figure 3 is a partial perspective view illustrating a plurality of footrests of the embodiment;

[0018] Figure 4 is a top view of the footrest of the embodiment;

[0019] Figure 5 is a three-dimensional view of one of the footrests of the embodiment;

[0020] Figure 6 is a side view of one of the feet of the embodiment; and

[0021] Figure 7is a side view of the foot base of the embodiment. DETAILED DESCRIPTION

[0022] See also Figure 1 and Figure 2 An embodiment of the foot rod device with a linkage stretching function of the present invention is suitable for use in folding chairs, support frames of measuring instruments, tripods of cameras, etc. Figure 1 and Figure 2 In the embodiment, the invention is applied to a folding chair 9 (only a part is shown) for illustration. The embodiment includes a limit frame 2, at least three telescopic tube sets 3, and at least three foot seats 4. In the embodiment, the invention includes three telescopic tube sets 3 and three foot seats 4 for illustration, but it can include four or five or more telescopic tube sets 3 and the same number of foot seats 4 according to actual application requirements, and is not limited thereto.

[0023] The telescopic tube groups 3 are arranged in intervals on the limiting frame 2, and each of the telescopic tube groups 3 extends along a telescopic direction L, and can be telescoped along the telescopic direction L and in a storage state (such as Figure 1 ) and a stretched state (such as Figure 2 ) changes. Each of the telescopic tube groups 3 has an outer tube 31 that passes through the limit frame 2, and an inner tube 32 that passes through the outer tube 31 and can move relative to the outer tube 31 along the telescopic direction L. The telescopic tube group 3 can achieve the effect of telescopic length by moving the inner tube 32 along the telescopic direction L. In this embodiment, the limit frame 2 is generally cylindrical, and the telescopic tube groups 3 are equidistant from each other and are arranged around the center of the limit frame 2, but the limit frame 2 can also be square, triangular or other shapes, or in the shape of a bracket, without being limited thereto. Since the structure of the telescopic tube group 3 can be inferred and expanded in detail by those skilled in the art based on the above description, no further explanation is given.

[0024] See also Figure 3 , Figure 4 and Figure 5 The feet 4 are respectively arranged at the ends of the inner tubes 32 and are adjacent to each other. Each foot 4 includes a body 41 arranged at the end of the corresponding inner tube 32, a snap-fit ​​block 42 extending from the body 41 toward one of the adjacent feet 4, and a snap-fit ​​groove 43 formed on the body 41 and with a recessed opening toward another adjacent foot 4. When the telescopic tube set 3 is extended and retracted along the telescopic direction L, the snap-fit ​​block 42 of each foot 4 is engaged with the snap-fit ​​groove 43 of one of the adjacent feet 4.

[0025] See also Figure 3 , Figure 5 and Figure 6The body 41 has a sleeve portion 411 sleeved on the end of the corresponding inner tube 32, and a base portion 412 connected to the sleeve portion 411 and located at one end away from the telescopic tube set 3. The base portion 412 protrudes from the sleeve portion 411, and cooperates with the sleeve portion 411 to define the engaging groove 43. The top surface of the base portion 412 (i.e., a groove bottom surface 413) defines the groove bottom of the engaging groove 43, and has an inclined surface 414 located at the bottom and away from the telescopic tube set 3. The angle between the inclined surface 414 and the horizontal plane is the same as the angle between the telescopic tube set 3 and the vertical line when it is unfolded to provide support.

[0026] The engaging block 42 has a supporting surface 421 that can be supported against the groove bottom surface 413. When the telescopic tube assembly 3 is extended and retracted along the telescopic direction L, the supporting surface 421 of the engaging block 42 of each foot 4 is supported against the groove bottom surface 413 of the adjacent foot 4, so that the foot 4 is mutually engaged to form a linked structure. The engaging block 42 of each foot 4 and the engaging groove 43 are at the same position in the telescopic direction L, so that the engaging block 42 of each foot 4 can be accommodated by the engaging groove 43 of the adjacent foot 4.

[0027] See also Figure 2 , Figure 3 and Figure 4 Each of the engaging grooves 43 of the foot 4 has a removal opening 431 in the radial direction of the telescopic direction L, through which the engaging block 42 of another adjacent foot 4 can be removed. Thus, when the telescopic tube assembly 3 is radially unfolded along the telescopic direction L (i.e., when the folding chair 9 is unfolded), each of the engaging blocks 42 can be removed from the corresponding removal opening 431 without being blocked.

[0028] See also Figure 5 , Figure 6 and Figure 7 , from the perspective of each of the footrests 4 (such as Figure 5 ), a first direction X and a second direction Y are defined as being perpendicular to each other, and the first direction X and the second direction Y are both perpendicular to the telescopic direction L. The engaging block 42 and the engaging groove 43 of each of the foot seats 4 are adjacent to each other along the first direction X and are in a step-like shape extending along the telescopic direction L. The engaging block 42 of each of the foot seats 4 is extended from the body 41 along the second direction Y, and the extending direction is at a right angle to the surface of the body 41 (see Figure 7 ).

[0029] See also Figure 1 , Figure 3 and Figure 4 , through the above description, the effects of this embodiment are as follows:

[0030] By providing the engaging block 42 and the corresponding engaging groove 43 on each of the foot seats 4, when the telescopic tube set 3 is extended and retracted along the telescopic direction L, the engaging block 42 of each of the foot seats 4 is engaged with the engaging groove 43 of one of the adjacent foot seats 4, and the engaging groove 43 of each of the foot seats 4 accommodates the engaging block 42 of another adjacent foot seat 4, and the engaging block 42 and the corresponding engaging groove 43 are engaged to make the foot seats 4 become a mutually linked structure. In this way, only one of the foot seats 4 or one of the telescopic tube sets 3 needs to be pulled, and the engagement of the foot seats 4 can link the other foot seats 4 and the telescopic tube sets 3 to extend and retract. Therefore, this embodiment can reduce the time required for the user to extend and retract the telescopic tube set 3, and greatly increase the convenience in use.

[0031] In summary, the foot rod device with linked stretching function of the present invention can indeed achieve the purpose of the present invention.

[0032] The above are merely embodiments of the present invention and should not be used to limit the scope of the present invention. That is, any simple equivalent changes and modifications made according to the claims and description of the present invention still fall within the scope of the present invention.

Claims

1. A foot rod device with a linked stretching function, comprising a limit frame; Features: The foot rod device with linked stretching function also includes at least three telescopic tube groups and at least three foot seats; The at least three telescopic tube groups are arranged in the limiting frame at intervals, and each of the telescopic tube groups extends along a telescopic direction and can be telescoped along the telescopic direction; The at least three feet are respectively arranged at the ends of the telescopic tube group and are adjacent to each other. Each foot includes a body arranged at the end of the corresponding telescopic tube group, a clamping block extending from the body toward one of the adjacent feet, and a clamping groove formed on the body and with a recessed opening toward another adjacent foot. When the telescopic tube group is extended and retracted along the telescopic direction, the clamping block of each foot is clamped into the clamping groove of one of the adjacent feet, and the clamping groove of each foot accommodates the clamping block of another adjacent foot.

2. The foot rod device with linked stretching function according to claim 1, characterized in that: The engaging block and the engaging groove of each of the foot seats are at the same position in the telescopic direction.

3. The foot rod device with linked stretching function according to claim 1, characterized in that: The body of each of the foot seats has a groove bottom surface defining the groove bottom of the engaging groove, and the engaging block has a supporting surface capable of supporting against the groove bottom surface.

4. The foot rod device with linked stretching function according to claim 1, characterized in that: The engaging groove of each of the foot seats has a moving-out opening in the radial direction of the telescopic direction for allowing the engaging block of another adjacent foot seat to move out.

5. The foot rod device with linked stretching function according to claim 1, characterized in that: The engaging block of each of the foot seats is adjacent to the engaging groove and is in a stepped shape along the telescopic direction.

6. The foot rod device with linked stretching function according to claim 1, characterized in that: The direction in which the engaging block of each foot seat extends from the body is at a right angle to the surface of the body.

7. The foot rod device with linked stretching function according to claim 1, characterized in that: The body of each foot seat has an inclined surface located at an end away from the telescopic tube set.

8. The foot rod device with linked stretching function according to claim 1, characterized in that: Each of the telescopic tube groups comprises an outer tube penetrating the limiting frame, and an inner tube penetrating the outer tube and capable of moving relative to the outer tube along the telescopic direction.

Images