Retracting and releasing structure of rocking handle

Abstract

The utility model relates to the technical field of rocking handles, in particular to a folding and unfolding structure of a rocking handle, which comprises a connecting shaft, the connecting shaft is a hollow pipe with an opening at the rear end, a movable seat is slidably arranged in the connecting shaft, a transverse handle is movably connected onto the movable seat, a convex rod is hinged to the end of the transverse handle, a cap body is rotatably sleeved on the convex rod, and the cap body is fixedly connected with the connecting shaft. During storage, the protruding rod is rotated to be located on the same straight line with the transverse handle, meanwhile, the transverse handle is rotated to be located on the same straight line with the connecting shaft, then the transverse handle, the movable base and the protruding rod can be pushed into the connecting shaft, the cap body covers and blocks an end opening of the connecting shaft, the whole body can be folded many times, and finally the storage size is small.

Description

Technical Field

[0001] The utility model relates to the technical field of cranks, in particular to a retractable structure of a crank. Background Art

[0002] Cranks are widely used. For example, in a hand-cranked hospital bed, the crank usually consists of a connecting shaft, a cross handle and a crank handle. At present, the overall volume of the crank structure is fixed and it is difficult to hide and store. Some cranks have a folding function, but can only be folded once, such as folding the cross handle and the crank handle.

[0003] This solution provides a retractable structure of a crank. Through the structural arrangement, it can be folded multiple times, and the cross handle and the crank handle are both retracted into the connecting shaft for dust-proof storage. Summary of the Utility Model

[0004] The utility model aims to at least solve the problem of relatively small folding force of the crank in the prior art.

[0005] This solution provides a retractable structure of a crank, which is achieved by the following specific technical means: including a connecting shaft, the connecting shaft is a hollow tube with an open end at the rear, an activity seat is slidably arranged in the connecting shaft, a cross handle is movably connected to the activity seat, at the same time, a convex rod is hinged to the end of the cross handle, a cap body is rotatably sleeved on the convex rod, and the cap body is used as a crank handle. When storing, the cross handle, the activity seat and the convex rod are pushed into the connecting shaft, and the cap body is sleeved and sealed at the port of the connecting shaft.

[0006] Preferred Technical Solution 1: The cap body consists of a top cap and a rotating cylinder rotatably connected to the bottom opening of the top cap. A notch one is opened on the wall of the rotating cylinder. The end of the convex rod extends into the top cap and is rotatably connected to the center of the top cap. When the cross handle is pulled out from the connecting shaft and placed horizontally, the convex rod is rotated to be perpendicular to the cross handle, so that the notch one is sleeved on the cross handle.

[0007] Preferred Technical Solution 2: A sliding plate one is slidably arranged in the top cap. The sliding plate one is rotatably connected to the end of the convex rod. At the same time, a spring one is connected between the sliding plate one and the top wall of the top cap.

[0008] Preferred Technical Solution 3: A spring two is connected between the activity seat and the inner end wall of the connecting shaft.

[0009] Preferred Technical Solution 4: A notch two is opened on the side wall at the rear end of the connecting shaft. When the cross handle is perpendicular to the connecting shaft, the cross handle is clamped into the notch two.

[0010] Preferred Technical Solution 5: When the cap body is sleeved on the connecting shaft, it is threadedly engaged with the outer wall of the connecting shaft through the internal thread on the inner wall.

[0011] Adopting the above structure enables this solution to have the following beneficial effects:

[0012] 1. The cross handle and the convex rod can be entirely received into the inner cavity of the connecting shaft, and a cap body is used to cover the rear port of the connecting shaft for overall dust-proof and hidden storage.

[0013] 2. It can be folded multiple times, and finally has a small storage volume.

[0014] 3. The settings of spring one and spring two limit the mutually perpendicular state after the convex rod, the cross handle and the connecting shaft are unfolded. Description of the Drawings

[0015] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0016] Figure 1 is the overall structural schematic diagram of this solution;

[0017] Figure 2 is the cross-sectional view of this solution;

[0018] Figure 3 is the front view of this solution;

[0019] Figure 4 is the exploded view of this solution;

[0020] Figure 5 is the structural schematic diagram of the cap body of this solution.

[0021] Among them, 1. Connecting shaft, 11. Notch two, 12. Retaining ring, 2. Movable seat, 21. Spherical groove, 3. Cross handle, 31. Spherical part, 4. Convex rod, 5. Cap body, 51. Top cap, 52. Rotating cylinder, 521. Notch one, 53. Slide plate one, 6. Spring one, 7. Spring two. Detailed Embodiment

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments; based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0023] Please refer to Figures 1 - 5, The retractable structure of the crank handle, including a connecting shaft 1. The connecting shaft 1 is a hollow tube with an open rear end. A movable seat 2 is slidably arranged inside the connecting shaft 1. A second spring 7 is connected between the movable seat 2 and the inner end wall of the connecting shaft 1. When the cap body 5 is away from the connecting shaft 1, the second spring 7 rebounds to push the movable seat 2 towards the rear end of the connecting shaft 1. A cross handle 3 is movably connected to the movable seat 2. The spherical part 31 fixed at the end of the cross handle 3 is slidably and rotatably connected to the spherical groove 21 opened on the movable seat 2. A second notch 11 is opened on the side wall of the rear end of the connecting shaft 1. When the cross handle 3 is perpendicular to the connecting shaft 1, the cross handle 3 is stuck into the second notch 11 to limit the perpendicular state of the cross handle 3 and the connecting shaft 1. At the same time, a convex rod 4 is hinged to the end of the cross handle 3. A cap body 5 is rotatably sleeved on the convex rod 4. The cap body 5 is used as a crank handle. When storing, the convex rod 4 is rotated to be in the same straight line as the cross handle 3. At the same time, the cross handle 3 is rotated to be in the same straight line as the connecting shaft 1. Then, the cross handle 3, the movable seat 2, and the convex rod 4 can be pushed into the connecting shaft 1, and the cap body 5 is covered and sealed at the port of the connecting shaft 1. The cap body 5 is composed of a top cap 51 and a rotating cylinder 52 rotatably connected to the bottom opening of the top cap 51. A first notch 521 is opened on the wall of the rotating cylinder 52. The end of the convex rod 4 extends into the top cap 51 and is rotatably connected to the center of the top cap 51. When the cross handle 3 is pulled out from the connecting shaft 1 and placed horizontally, the convex rod 4 is rotated to be perpendicular to the cross handle 3, so that the first notch 521 is sleeved on the cross handle 3 to limit the perpendicular state of the cap body 5 and the cross handle 3.

[0024] Please refer to Figures 2 - 5 , The retractable structure of the crank handle. A first slide plate 53 is slidably arranged inside the top cap 51. The first slide plate 53 is rotatably connected to the end of the convex rod 4. At the same time, a first spring 6 is connected between the first slide plate 53 and the top wall of the top cap 51. The first notches 521 are symmetrically opened on both sides of the rotating cylinder 52. When the cross handle 3 is pulled out from the connecting shaft 1 and the cap body 5 and the cross handle 3 are in the same straight line state, first pull the top cap 51 outwards so that the first spring 6 is stretched. At the same time, the first slide plate 53 moves towards the rotating cylinder 52 direction, moving the cap body 5 away from the end of the cross handle 3. Then rotate the cap body 5 to be perpendicular to the cross handle 3. Then release the cap body 5, so that the first spring 6 rebounds to pull the cap body 5, and the two groups of first notches 521 are sleeved on the cross handle 3 to limit the perpendicular state of the cap body 5 and the cross handle 3. At this time, the cap body 5 can be rotated. The top cap 51 is threadedly engaged with the outer wall of the connecting shaft 1 through the internal thread on the inner wall when sleeved on the connecting shaft 1.

[0025] Please refer to Figure 2 , The retractable structure of the crank handle. A retaining ring 12 is fixed on the inner wall of the rear end face of the connecting shaft 1. The retaining ring 12 is used to limit the position of the movable seat 2, so that when the second spring 7 rebounds, the movable seat 2 is pushed to contact the retaining ring 12. The retaining ring 12 is an arc-shaped ring. The fan-shaped opening of the arc-shaped ring is facing the second notch 11 to avoid interfering with the movement of the cross handle 3.

[0026] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A retractable structure of a crank, comprising a connecting shaft (1), characterized in that: The connecting shaft (1) is a hollow tube with an open rear end. An active seat (2) is slidably arranged inside the connecting shaft (1). A cross handle (3) is movably connected to the active seat (2). At the same time, a convex rod (4) is hinged to the end of the cross handle (3). A cap body (5) used as a crank is rotatably sleeved on the convex rod (4). After pushing the cross handle (3), the active seat (2), and the convex rod (4) into the connecting shaft (1), the cap body (5) covers and seals the port of the connecting shaft (1).

2. The retractable structure of a crank according to claim 1, characterized in that: The cap body (5) is composed of a top cap (51) and a rotating cylinder (52) rotatably connected to the bottom opening of the top cap (51). A notch one (521) is formed on the wall of the rotating cylinder (52). The end of the convex rod (4) extends into the top cap (51) and is rotatably connected to the center of the top cap (51). When the convex rod (4) rotates to be perpendicular to the cross handle (3), the notch one (521) is sleeved on the cross handle (3).

3. The retractable structure of a crank according to claim 2, characterized in that: A slide plate one (53) is slidably arranged inside the top cap (51). The slide plate one (53) is rotatably connected to the end of the convex rod (4). At the same time, a spring one (6) is connected between the slide plate one (53) and the top wall of the top cap (51). The notch one (521) is symmetrically formed on both sides of the rotating cylinder (52).

4. The retractable structure of a crank handle according to claim 1, characterized in that: A spring two (7) is connected between the active seat (2) and the inner end wall of the connecting shaft (1).

5. The retractable structure of a crank handle according to claim 4, characterized in that: A notch two (11) is formed on the side wall of the rear end of the connecting shaft (1). When the cross handle (3) is perpendicular to the connecting shaft (1), the cross handle (3) is clamped into the notch two (11).

6. The retractable structure of a crank according to claim 2, characterized in that: When the top cap (51) is sleeved on the connecting shaft (1), it is threadedly engaged with the outer wall of the connecting shaft (1) through the internal thread on the inner wall.

7. The retracting and extending structure of a crank handle according to claim 4, characterized in that: A retaining ring (12) is fixed to the inner wall of the rear end face of the connecting shaft (1). The retaining ring (12) is used to limit the position of the active seat (2).

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