Wheelchair armrest assembly

Abstract

The wheelchair armrest assembly comprises an armrest seat and a connecting seat arranged on the armrest seat, the upper surface of the armrest seat is provided with an armrest groove arranged in the front-back direction, the bottom face of the armrest groove is an arc face gradually rising from the middle to the left side and the right side, and the armrest groove comprises an arm groove section and a wrist groove section located on the arm groove section. The rear end of the wrist groove section is connected with the front end of the arm groove section, and the bottom surface of the wrist groove section is saddle-shaped. When a user puts the hand on the armrest seat, the arm is supported in the arm groove section, and the wrist is supported in the wrist groove section, so that the design accords with human engineering, and the comfort is better.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair accessories technology, and in particular to a wheelchair armrest assembly. Background Technology

[0002] In order to enable the armrests of wheelchairs to have both lifting and sliding functions, patent application CN 105105939A discloses an armrest structure for wheelchairs. The device has a lifting unit connected to the center of the wheelchair armrest assembly, and also includes a sliding unit that is perpendicularly connected to the lifting unit. By adding the lifting unit and the sliding unit to the wheelchair armrest assembly, the wheelchair armrest assembly can be lifted or slid forward and backward, which is suitable for users of different heights and various posture adjustments.

[0003] However, this wheelchair armrest structure also has the following problems: First, the upper surface of the wheelchair armrest is flat, which is not comfortable for the user's hands when placed on it; Second, the instruction manual for this wheelchair armrest states in paragraph 0019: "When it is necessary to adjust the wheelchair armrest structure 8 forward and backward, apply a force parallel to the sliding direction to the sliding part 3. The sliding part 3 slides forward or backward along the sliding mating part 4 to realize the forward and backward sliding of the wheelchair armrest structure 8. When it reaches the position required by the user, press the button 7, and apply force to the screw 6 through the limiting spring 5 to move the screw 6 into the limiting hole 13, thus limiting the sliding part 3 to the required position." After the screw 6 is moved into the limiting hole 13, it is very difficult to pull the screw 6 out of the limiting hole 13 to unlock the sliding part 3. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a wheelchair armrest assembly that is comfortable to use and ergonomic.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0006] A wheelchair armrest assembly includes an armrest base and a connecting seat disposed on the armrest base. The upper surface of the armrest base is provided with a handrest groove arranged in a front-to-back direction. The bottom surface of the handrest groove is an arc surface that gradually rises from the center to the left and right sides. The handrest groove includes an arm groove segment and a wrist groove segment located between the arm groove segment and the wrist groove segment. The rear end of the wrist groove segment is connected to the front end of the arm groove segment. The bottom surface of the wrist groove segment is saddle-shaped.

[0007] In a preferred embodiment of this utility model, the bottom surface of the wrist groove segment is a cylindrical arc surface, and the axis of the cylindrical arc surface is a horizontal line arranged along the front-back direction.

[0008] In a preferred embodiment of this utility model, the armrest seat is provided with a guide groove arranged along the front-to-back direction, the connecting seat is slidably installed in the guide groove, the connecting seat is provided with at least two locking holes spaced apart along the front-to-back direction, the armrest seat is provided with a guide hole, a pin that can be inserted into the locking hole is slidably disposed in the guide hole, the armrest seat is provided with a reset elastic element that can drive the pin into the locking hole by elastic force, and the armrest seat is also provided with an unlocking element that drives the pin to be pulled out of the corresponding locking hole when the unlocking element moves.

[0009] In a preferred embodiment of this utility model, the unlocking component is a pressing pry plate, and the end of the pin is provided with a pry bar located outside the guide hole. One end of the pressing pry plate has a lifting part located between the pry bar and the armrest seat, and the other end of the pressing pry plate has a pressing part. When the pressing part is pressed, the lifting part lifts the pry bar so that the pin moves along the guide hole.

[0010] In a preferred embodiment of this utility model, the pry bar is screwed to the pin.

[0011] In a preferred embodiment of this utility model, the first end of the pin is provided with a first limiting platform, the guide hole is provided with a second limiting platform, and the elastic element is a compression spring sleeved on the pin, with one end of the compression spring abutting against the first limiting platform and the other end abutting against the second limiting platform.

[0012] In a preferred embodiment of this utility model, the armrest seat is provided with a guide liner, and the guide groove is provided on the guide liner.

[0013] The beneficial effects of this utility model are: when the user's hand is placed on the armrest, the arm is supported in the armrest groove and the wrist is supported in the wrist groove. This design is ergonomic and provides better comfort. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present invention;

[0015] Figure 2 This is the front view of the armrest seat;

[0016] Figure 3 This is an exploded view of the present invention;

[0017] Figure 4 This is an exploded view of the present invention;

[0018] Figure 5 yes Figure 4 Enlarged view of section A. Detailed Implementation

[0019] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indicator will also change accordingly. Furthermore, descriptions involving "preferred," "second-preferred," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "preferred" or "second-preferred" may explicitly or implicitly include at least one of those features.

[0021] Reference Figures 1 to 5 This utility model proposes a wheelchair armrest assembly, including an armrest base 2 and a connecting seat 12 disposed on the armrest base 2. The upper surface of the armrest base 2 is provided with a handrest groove 26 arranged in the front-back direction. The bottom surface of the handrest groove 26 is an arc surface that gradually rises from the middle to the left and right sides. The handrest groove 26 includes an arm groove segment 261 and a wrist groove segment 262 located between the arm groove segment 261 and the wrist groove segment 262. The rear end of the wrist groove segment 262 is connected to the front end of the arm groove segment 261.

[0022] The bottom surface of the wrist groove section 262 is saddle-shaped. The bottom surface of the wrist groove section 262 is a cylindrical arc surface, and the axis of the cylindrical arc surface is a horizontal line arranged along the front-back direction. When the user's hand is placed on the armrest seat 2, the arm is supported in the arm groove section 261 and the wrist is supported in the wrist groove section 262. This design conforms to ergonomics and provides better comfort.

[0023] Furthermore, the lower surface of the armrest seat 2 is provided with a guide groove 205 arranged along the front-back direction. The connecting seat 12 is slidably installed in the guide groove 205. At least two locking holes 101 are provided on the connecting seat 12 at intervals along the front-back direction. The armrest seat 2 is provided with a guide hole 201. A pin 3 that can be inserted into the locking hole 101 is slidably arranged in the guide hole 201. The armrest seat 2 is provided with a reset elastic element that can drive the pin 3 to be inserted into the locking hole 101 by elastic force. The armrest seat 2 is also provided with an unlocking element that is driven to cooperate with the pin 3. When the unlocking element moves, it drives the pin 3 to be pulled out of the corresponding locking hole 101.

[0024] The number of keyholes 101 is generally 2, 3, 4, 5, etc.

[0025] In a preferred embodiment of this utility model, the unlocking component is a pressing pry plate 41. The end of the pin 3 is provided with a pry bar 31 located outside the guide hole 201. One end of the pressing pry plate 41 has a prying part 411 located between the pry bar 31 and the armrest seat 2, and the other end of the pressing pry plate 41 has a pressing part 412, with space between the pressing part 412 and the armrest seat 2. When it is necessary to adjust the front and rear position of the armrest seat 2, the pressing part 412 can be pressed down. At this time, the prying part 411 will lift the pry bar 31, causing the pin 3 to move along the guide hole 201 and be pulled out from the corresponding lock hole 101. At this point, the armrest seat 2 can be moved back and forth. When the armrest seat 2 is about to be adjusted to the correct position, the pressing pry plate 41 can be released. At this time, under the elastic force of the reset elastic element, the locking rod will press against the mounting bracket 1. When the locking rod is aligned with the corresponding lock hole 101, under the action of the reset elastic element, the locking rod can be automatically inserted into the lock hole 101, locking the armrest seat 2 and the mounting bracket 1 again.

[0026] The pry bar 31 is fixedly connected to the pin 3, which can be done by screwing, welding, etc., with screwing being the best.

[0027] Preferably, the first end of the pin 3 is provided with a first limiting platform 301, and the guide hole 201 is provided with a second limiting platform 202. The elastic element is a compression spring 5 sleeved on the pin 3. One end of the compression spring 5 abuts against the first limiting platform 301, and the other end abuts against the second limiting platform 202.

[0028] To improve durability, the armrest seat 2 is equipped with a guide liner 7, and a guide groove 205 is provided on the guide liner 7. The guide liner 7 is generally made of wear-resistant metal material, which helps to improve the durability of the product.

[0029] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A wheelchair armrest assembly, characterized by, The armrest base (2) is provided with an armrest groove (26) arranged along the front-rear direction on the upper surface thereof, the bottom surface of the armrest groove (26) is an arc surface gradually rising from the middle part to the left and right sides, the armrest groove (26) comprises an arm groove segment (261) and a wrist groove segment (262) located at the front end of the arm groove segment (261), the bottom surface of the wrist groove segment (262) is in a saddle shape.

2. A wheelchair armrest assembly according to claim 1, wherein, The bottom surface of the wrist groove segment (262) is a cylindrical arc surface, and the axis of the cylindrical arc surface is a horizontal line arranged along the front-rear direction.

3. A wheelchair armrest assembly according to claim 1, wherein, The armrest base (2) is provided with a guide groove (205) arranged along the front-rear direction, the connecting base (12) is slidingly installed in the guide groove (205), at least two lock holes (101) are arranged on the connecting base (12) along the front-rear direction, the armrest base (2) is provided with a guide hole (201), a bolt (3) capable of being inserted into the lock hole (101) is slidingly arranged in the guide hole (201), the armrest base (2) is provided with a reset elastic member capable of driving the bolt (3) to be inserted into the lock hole (101) by elastic force, and the armrest base (2) is further provided with an unlocking member in transmission cooperation with the bolt (3), the unlocking member drives the bolt (3) to be pulled out of the corresponding lock hole (101) when the unlocking member moves.

4. A wheelchair armrest assembly according to claim 3, wherein, The unlocking member is a pressing pry plate (41), the end of the bolt (3) is provided with a pry table (31) located outside the guide hole (201), one end of the pressing pry plate (41) has a pry part (411) located between the pry table (31) and the armrest base (2), the other end of the pressing pry plate (41) has a pressing part (412), when the pressing part (412) is pressed, the pry part (411) lifts the pry table (31) to move the bolt (3) along the guide hole (201).

5. A wheelchair armrest assembly according to claim 4, wherein, The pry table (31) is screwed with the bolt (3).

6. A wheelchair armrest assembly according to claim 4, wherein, The first end of the bolt (3) is provided with a first limiting table (301), the guide hole (201) is provided with a second limiting table (202), the elastic member is a compression spring (5) sleeved on the bolt (3), one end of the compression spring (5) abuts against the first limiting table (301), and the other end of the compression spring (5) abuts against the second limiting table (202).

7. A wheelchair armrest assembly according to claim 3, wherein, The armrest base (2) is provided with a guide inner lining member (7), and the guide groove (205) is arranged on the guide inner lining member (7).

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