Integrated rotary brake handle

Abstract

The utility model provides a kind of integrated rotary brake handle, belong to wheelchair accessory technical field, it includes fixed seat, rotary handle and locking assembly, rotary handle is installed to fixed seat rotation, locking assembly includes handle and lock post, lock post is slidably installed to fixed seat and sliding direction is far from or close to rotary handle, rotary handle is provided with and lock post matched insertion lock hole, lock post and lock hole cooperation limit rotary handle rotation, the handle is rotatably installed to fixed seat and is transmission connection with lock post, the rotation of handle drives lock post to slide, through the optimization design of fixed seat, rotary handle and locking assembly, the plug-in and separation of handle and rotary handle lock hole are driven by handle, the quick locking and folding function of handle are realized.Locking structure is stable, ensure normal push and brake;After unlocking, it can be folded inwards and rotated, significantly reduce the occupied space, so that wheelchair is more flexible and convenient in storage, storage and transportation process.

Description

Technical Field

[0001] This utility model belongs to the field of wheelchair accessories technology, and in particular relates to an integrated rotary brake lever. Background Technology

[0002] A wheelchair is a chair with wheels, available in electric and manual types. It serves not only as a means of transportation for people with physical disabilities and limited mobility, but also as an important assistive device for physical exercise and participation in social activities. A typical wheelchair consists of a frame, wheels, seat, handles, and brakes. The handles, as a key component of the wheelchair, are the part the operator holds when pushing it.

[0003] Currently, wheelchair handlebars are mainly connected to the wheelchair frame via a fixed installation method. This fixed installation means that the handlebars cannot be rotated or folded inwards, resulting in the wheelchair taking up more space during storage, folding, and transportation. This makes storage inconvenient and less flexible, increasing the difficulty of transportation and storage to some extent. Summary of the Invention

[0004] Based on the aforementioned problems in the existing technology, this utility model provides an integrated rotary brake lever, which includes a fixed base, a rotary lever, and a locking assembly. The rotary lever is rotatably mounted to the fixed base. The locking assembly includes a lever and a locking pin. The locking pin is slidably mounted to the fixed base, and the sliding direction is away from or towards the rotary lever. The rotary lever is provided with a locking hole that matches the locking pin for insertion. The locking pin and the locking hole cooperate to restrict the rotation of the rotary lever. The lever is rotatably mounted to the fixed base and is drively connected to the locking pin. The rotation of the lever causes the locking pin to slide.

[0005] The fixed base has a mounting cavity. The rotating handle is horizontally mounted into the mounting cavity. The locking pin is vertically slidably mounted to the bottom of the mounting cavity. The lower end of the locking pin passes through the bottom of the mounting cavity and extends to the outside of the base. A dial ring is fixedly mounted at the lower end of the locking pin. The lever is vertically swivelly mounted to the bottom of the fixed base. One end of the lever is provided with a lever fork that is adapted to the lever ring and is engaged with the lower end of the locking pin.

[0006] The locking pin includes a positioning pin and an unlocking sleeve. The tail end of the positioning pin passes through the bottom of the mounting cavity from bottom to top and is inserted into the lock hole. The head end of the positioning pin is located outside the fixed seat and is engaged inside the unlocking sleeve. The dial ring is located outside the unlocking sleeve, and the dial fork is engaged above the dial ring. A base box is fixedly installed at the bottom of the fixed seat. The base box covers the unlocking sleeve. A resistance spring is provided inside the unlocking sleeve. One end of the resistance spring contacts the head end of the positioning pin, and the other end of the resistance spring contacts the base box. The resistance spring prevents the locking pin from sliding downward.

[0007] The rotating handle has an upper shaft cavity at its top, and an upper rotating shaft is mounted inside the upper shaft cavity, sliding up and down. An upper return spring is provided between the upper rotating shaft and the upper shaft cavity, resisting the upper rotating shaft from sliding down. The top of the mounting cavity has an upper shaft hole that is adapted to and rotates with the upper rotating shaft. The upper rotating shaft can be inserted into the upper shaft hole in a telescopic manner. The top of the upper shaft hole has a piercing hole that extends to the top of the fixed base.

[0008] The bottom of the rotating handle is provided with a lower shaft cavity, in which a lower rotating shaft is slidably mounted. A lower return spring is provided between the lower rotating shaft and the lower shaft cavity. The lower return spring resists the lower rotating shaft from sliding upward. The bottom of the mounting cavity is provided with a lower shaft hole that is adapted to and rotatably fitted with the lower rotating shaft. The lower rotating shaft can be extended and retracted into the lower shaft hole.

[0009] The fixing seat is provided with a mounting shaft groove for insertion and fixing onto the wheelchair frame, and the mounting shaft groove is provided with a number of friction protrusions that extend axially and protrude towards the central axis.

[0010] The bottom of the mounting cavity is provided with an arc-shaped groove, which coincides with the trajectory of the brake line when the handle is rotated.

[0011] The mounting cavity has a limiting wall on one side, which is the outer side. The limiting wall and the rotating handle are in contact and cooperate to restrict the rotating handle from rotating outward.

[0012] The beneficial effects of this invention are as follows: By optimizing the structure of the traditional wheelchair brake handle, a combination design of a fixed base, a rotating handle, and a locking assembly is adopted. The handle is quickly locked and released by engaging or disengaging the locking pin with the locking hole on the rotating handle via a lever. When locked, the rotating handle can still function normally for pushing and braking, and the structure is stable and reliable. When unlocked, the rotating handle can be folded inwards, greatly reducing the overall space occupied by the wheelchair and making it more flexible and convenient for storage and transportation. This effectively solves the problems of existing fixed handles being unable to fold and having low space utilization. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a three-dimensional structure of an integrated rotary brake lever.

[0014] Figure 2 This is a schematic diagram of a three-dimensional structure of an integrated rotating brake lever from another angle.

[0015] Figure 3 This is a schematic diagram of a one-piece rotary brake lever that hides the rotary handle.

[0016] Figure 4 This is a schematic diagram showing the interaction between the rotary handle and the locking assembly.

[0017] Figure 5This is a cross-sectional structural diagram of an integrated rotary brake lever.

[0018] Figure 6 This is a top-view schematic diagram of an integrated rotary brake lever, which conceals the bottom box.

[0019] Figure 7 This is a schematic diagram of the bottom box and its internal structure. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0021] As attached Figure 1-7The diagram shows an integrated rotary brake lever, comprising a fixed base 1, a rotary handle 2, and a locking assembly 3. The fixed base 1 has a mounting cavity 4, into which the rotary handle 2 is horizontally rotatably mounted. The bottom of the mounting cavity 4 has an arc-shaped groove 5, which coincides with the trajectory of the brake cable as the rotary handle 2 rotates. The rotary handle 2 includes a grip 6 and a brake lever 7, with a brake cable connected to the brake lever 7. The brake cable passes through the arc-shaped groove 5 and extends to the pulley, facilitating the movement of the brake cable. A limiting wall 8 is provided on one side of the mounting cavity 4, which is the outer side. The limiting wall 8 contacts and engages with the rotary handle 2, restricting its outward rotation. A wheelchair can be fitted with two rotary brake levers, which are mirror-symmetrical. The side closer to each other is the inner side, and the side further apart is the outer side. The limiting wall 8 improves the connection stability of the rotary handle 2 and prevents it from swinging outward. The locking assembly 3 includes a lever 9 and a locking pin 10. The locking pin 10 includes a positioning pin 11 and an unlocking sleeve 12. The bottom of the rotating handle 2 is provided with a locking hole that matches the positioning pin 11. The tail end of the positioning pin 11 passes through the bottom of the mounting cavity 4 from bottom to top and is inserted into the locking hole. Since the rotating handle 2 is installed in the mounting cavity 4, and the positioning pin 11 is installed vertically and horizontally at the bottom of the fixing base 1 and inserted into the mounting cavity 4, the sliding direction of the positioning pin 11 is away from or towards the rotating handle 2. The positioning pin 11 of the locking pin 10 and the locking hole cooperate to restrict the rotation of the rotating handle 2. The head end of the positioning pin 11 is located outside the fixing base 1 and is engaged with the unlocking sleeve 12, so that the locking pin 10 can be installed vertically and horizontally at the bottom of the mounting cavity 4. The lower end of the locking pin 10 passes through the bottom of the mounting cavity 4 and extends to the outside of the base. The unlocking sleeve 12 serves as the lower end of the locking pin 10, and a lever ring 13 is fixedly provided on the outer side of the unlocking sleeve 12. The lever 9 is mounted to the bottom of the fixed base 1 and rotates up and down. One end of the lever 9 is provided with a fork 14 that is adapted to the lever ring 13 and can be turned. The fork 14 is attached to the unlocking sleeve 12, which is the lower end of the locking pin 10. The fork 14 is located above the lever ring 13 and is in contact with the lever ring 13, so that the lever 9 can be connected to the locking pin 10. The up and down rotation of the lever 9 causes the locking pin 10 to slide. A base box 15 is fixedly installed at the bottom of the fixed base 1. The base box 15 covers the unlocking sleeve 12. A resistance spring 16 is provided inside the unlocking sleeve 12. One end of the resistance spring 16 is in contact with the head end of the positioning pin 11, and the other end of the resistance spring 16 is in contact with the base box 15. The resistance spring 16 resists the downward sliding of the locking pin 10.

[0022] In a preferred embodiment, the top of the rotating handle 2 is provided with an upper shaft cavity 17, within which an upper rotating shaft 18 is slidably mounted. An upper return spring 19 is provided between the upper rotating shaft 18 and the upper shaft cavity 17, resisting downward sliding of the upper rotating shaft 18. The top of the mounting cavity 4 is provided with an upper shaft hole that is adapted to and rotatably fitted with the upper rotating shaft 18. The upper rotating shaft 18 can be retractably inserted into the upper shaft hole. The top of the upper shaft hole is provided with a piercing hole 20 extending to the top of the fixing seat 1. The diameter of the piercing hole 20 is relatively small, allowing the upper rotating shaft 18 to be pressed using a piercing needle, thereby enabling the disassembly of the rotating handle 2. Simultaneously, the small-diameter piercing hole also minimizes the probability of dust and foreign objects entering the upper shaft hole. The bottom of the rotating handle 2 is provided with a lower shaft cavity 21, and a lower rotating shaft 22 is slidably installed in the lower shaft cavity 21. A lower return spring 23 is provided between the lower rotating shaft 22 and the lower shaft cavity 21 to resist the upward sliding of the lower rotating shaft 22. The bottom of the mounting cavity 4 is provided with a lower shaft hole 24 that is adapted to and rotatably engages with the lower rotating shaft 22. The lower rotating shaft 22 can be retractably inserted into the lower shaft hole 24. The lower shaft hole 24 extends downward and passes through the bottom of the mounting cavity 4, which facilitates the removal of the rotating handle 2 by pressing the lower rotating shaft 22 with an external object through the lower shaft hole 24. The fixing base 1 is provided with a mounting shaft groove 25 for insertion and fixing to the wheelchair frame. The mounting shaft groove 25 is provided with multiple friction protrusions 26 that extend axially and protrude towards the central axis. The friction protrusions 26 are arc-shaped protrusions and are evenly spaced from each other. The arc-shaped protrusions facilitate the insertion and installation of the fixing base 1 onto the wheelchair frame.

[0023] The rotary brake levers provided by this utility model are used in pairs. The two rotary brake levers are mirror-symmetrical to each other and are respectively installed on the left and right sides of the same wheelchair frame. When the wheelchair is in normal use, the two rotary brake levers are rotated outwards until they contact the limiting wall 8. At this time, the positioning pin 11 is inserted into the locking hole and locks the rotary brake lever. The rotary brake lever cannot be rotated, and the wheelchair can be pushed or pulled normally.

[0024] When the wheelchair needs to be folded for storage or transportation, push the lever 9 upwards. The lever 9 will press down the positioning pin 11 through the ring 13. The positioning pin 11 will disengage from the locking hole. At this time, the two rotating brake levers can be rotated inwards to complete the folding. This avoids the brake levers protruding and taking up more space, making the folding, storage, transportation and storage of the wheelchair more convenient.

[0025] The above-described embodiments are merely one implementation of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An integrated rotary brake lever, characterized in that, It includes a fixed base (1), a rotating handle (2) and a locking assembly (3). The rotating handle (2) is rotatably mounted to the fixed base (1). The locking assembly (3) includes a lever (9) and a locking pin (10). The locking pin (10) is slidably mounted to the fixed base (1) and the sliding direction is away from or close to the rotating handle (2). The rotating handle (2) is provided with a locking hole that matches the locking pin (10). The locking pin (10) and the locking hole cooperate to restrict the rotation of the rotating handle (2). The lever (9) is rotatably mounted to the fixed base (1) and is connected to the locking pin (10) in a transmission manner. The rotation of the lever (9) drives the locking pin (10) to slide.

2. The integrated rotary brake lever according to claim 1, characterized in that, The fixed base (1) is provided with an installation cavity (4). The rotating handle (2) is installed in the installation cavity (4) in a horizontal rotation. The locking pin (10) is installed in the bottom of the installation cavity (4) in a vertical sliding manner. The lower end of the locking pin (10) passes through the bottom of the installation cavity (4) and extends to the outside of the base. The lower end of the locking pin (10) is fixedly provided with a dial ring (13). The lever (9) is installed in the bottom of the fixed base (1) in a vertical rotation. One end of the lever (9) is provided with a lever fork (14) that is adapted to the dial ring (13) and is turned. The lever fork (14) is connected to the lower end of the locking pin (10) and contacts and cooperates with the dial ring (13).

3. The integrated rotary brake lever according to claim 2, characterized in that, The locking pin (10) includes a positioning pin (11) and an unlocking sleeve (12). The tail end of the positioning pin (11) passes through the bottom of the mounting cavity (4) from bottom to top and is inserted into the lock hole. The head end of the positioning pin (11) is located outside the fixed seat (1) and is engaged inside the unlocking sleeve (12). The dial ring (13) is located outside the unlocking sleeve (12), and the dial fork (14) is engaged above the dial ring (13). A bottom box (15) is fixedly installed at the bottom of the fixed seat (1). The bottom box (15) covers the unlocking sleeve (12). A resistance spring (16) is provided inside the unlocking sleeve (12). One end of the resistance spring (16) contacts the head end of the positioning pin (11), and the other end of the resistance spring (16) contacts the bottom box (15). The resistance spring (16) resists the locking pin (10) from sliding downward.

4. The integrated rotary brake lever according to claim 2, characterized in that, The top of the rotating handle (2) is provided with an upper shaft cavity (17), and an upper rotating shaft (18) is installed in the upper shaft cavity (17) and slides up and down. An upper return spring (19) is provided between the upper rotating shaft (18) and the upper shaft cavity (17). The upper return spring (19) resists the upper rotating shaft (18) from sliding down. The top of the mounting cavity (4) is provided with an upper shaft hole that is adapted to and rotates with the upper rotating shaft (18). The upper rotating shaft (18) can be inserted into the upper shaft hole in a telescopic manner. The top of the upper shaft hole is provided with a piercing hole (20) that extends to the top of the fixed seat (1).

5. The integrated rotary brake lever according to claim 2, characterized in that, The bottom of the rotating handle (2) is provided with a lower shaft cavity (21), and a lower rotating shaft (22) is installed in the lower shaft cavity (21) and slides up and down. A lower return spring (23) is provided between the lower rotating shaft (22) and the lower shaft cavity (21). The lower return spring (23) resists the lower rotating shaft (22) from sliding upward. The bottom of the mounting cavity (4) is provided with a lower shaft hole (24) that is adapted to rotate with the lower rotating shaft (22). The lower rotating shaft (22) can be extended and retracted into the lower shaft hole (24).

6. An integrated rotary brake lever according to any one of claims 1-5, characterized in that, The mounting base (1) is provided with a mounting shaft groove (25) for insertion and fixed installation on the wheelchair frame. The mounting shaft groove (25) is provided with a number of friction protrusions (26) that extend axially and protrude toward the central axis.

7. An integrated rotary brake lever according to any one of claims 2-5, characterized in that, The bottom of the mounting cavity (4) is provided with an arc-shaped groove (5), and the arc-shaped groove (5) coincides with the trajectory of the brake line when the rotating handle (2) is rotated.

8. An integrated rotary brake lever according to any one of claims 2-5, characterized in that, A limiting wall (8) is provided on one side of the mounting cavity (4). The side with the limiting wall (8) is the outer side. The limiting wall (8) and the rotating handle (2) are in contact and cooperate to restrict the rotating handle (2) from rotating outward.

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