Unlocking mechanism for battery pack of electric wheelchair

Abstract

The utility model provides an electric wheelchair battery pack unlocking mechanism, which belongs to the technical field of storage batteries and comprises a battery outer shell and a handle outer shell, the handle outer shell is arranged on the upper portion of the battery outer shell, the electric wheelchair battery pack unlocking mechanism further comprises a lock pin and a pressing portion, and the top surface of the handle outer shell is provided with a first opening for the pressing portion to vertically move. The side faces of the two sides of the handle shell are each provided with a second opening allowing the lock pin to move horizontally. When the pressing part is pressed, the lock pin shrinks towards the interior of the handle shell. According to the utility model, a double-lock-pin structure is adopted, so that the self-locking safety can be improved, and the battery is ensured not to loosen under working conditions such as vibration or impact; meanwhile, disassembly and assembly are rapid, one-key unlocking is achieved, and disassembly and charging of the battery are convenient.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an unlocking mechanism for an electric wheelchair battery pack. Background Technology

[0002] The battery mounting methods for existing electric wheelchairs are generally divided into fixed and replaceable types. Among them, replaceable batteries are generally mounted on the electric wheelchair frame in a movable manner, without the need for the entire vehicle to be charged.

[0003] While existing technologies using removable batteries to unlock electric wheelchairs improve their flexibility, they also have some drawbacks: some mechanical locks require significant force to unlock, and some designs require pressing a button and sliding the battery simultaneously, making the process cumbersome, especially for the elderly and those with hand weakness, potentially causing delays in emergencies. Therefore, finding a quick and convenient way to install and remove the battery is a key focus for current technology developers. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a solution to at least one technical problem raised in the background art.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an unlocking mechanism for an electric wheelchair battery pack, including a battery housing and a handle housing, the handle housing being disposed on the upper part of the battery housing, and also including a locking pin and a pressing part, the top surface of the handle housing being provided with a first opening for the pressing part to move vertically, and the two sides of the handle housing being respectively provided with a second opening for the locking pin to move horizontally; when the pressing part is pressed, the locking pin retracts into the handle housing.

[0006] Furthermore, the battery housing and the handle housing are fixedly connected by a handle base. The handle base has an upwardly raised buckle groove in the middle, and a guide groove is provided on each side of the buckle groove. A first guide post is horizontally provided on the inner wall of the guide groove. The locking pin has a blind hole, and the first guide post is inserted into the blind hole.

[0007] Furthermore, the first guide post is provided with a spring, the diameter of which is larger than that of the blind hole. The two ends of the spring abut against the locking pin and the inner wall of the guide groove, respectively. The locking pin can compress the spring to move horizontally along the first guide post.

[0008] Furthermore, a handle bracket is provided between the handle housing and the handle base; the pressing part is provided on the top surface of the handle bracket, and through holes are provided on both sides of the pressing part; a second guide post is vertically provided on the top surface of the buckle groove, the second guide post passes through the through hole, and the top end of the second guide post is connected to the handle housing, limiting the range of movement of the handle bracket between the handle housing and the handle base; when the pressing part is pressed, the handle bracket can slide along the second guide post.

[0009] Furthermore, the locking pin is provided with a limiting protrusion, and the handle bracket is provided with a guide slope that gradually slopes downward from the inside to the outside; the guide slope abuts against the limiting protrusion so that when the handle bracket slides along the second guide post, it drives the locking pin to move horizontally along the first guide post.

[0010] Furthermore, the end of the guide ramp extends inward to form a limiting stop, so that when the spring is overextended, the lower end face of the limiting protrusion abuts against the limiting stop, preventing the locking pin from disengaging from the first guide post.

[0011] Furthermore, the upper wall of the guide groove is provided with a guide protrusion, and the locking pin is provided with a locking groove that slides with the guide protrusion.

[0012] Furthermore, the angle between the guide ramp and the first guide post is 20 to 70 degrees.

[0013] Preferably, the angle between the guide ramp and the first guide post is 45 degrees.

[0014] Furthermore, the lower part of the battery casing is provided with several slots.

[0015] The beneficial effects of this utility model are as follows: This utility model uses double locking pins to fix the battery. Under the double locking mechanism, it provides higher safety and anti-drop performance: even if one locking pin fails due to vibration or impact, the other can still keep the battery stable and prevent accidental fall-off during driving; at the same time, the double locking pins share the battery load and avoid single-point stress concentration, which can effectively extend the life of the locking buckle, especially for large-capacity heavy batteries; this utility model has a simple design and convenient steps. While pressing the button, it can provide unlocking for multiple points that are not on the same axis. One-button unlocking is convenient for the elderly or people with weak hands to use. Attached Figure Description

[0016] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. It is obvious that the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0019] Figure 3 This is a partially enlarged structural diagram of the battery pack of this utility model in the unlocked state;

[0020] Figure 4 This is a partially enlarged structural diagram of the handle base of this utility model;

[0021] Figure 5 This is a schematic diagram of the locking pin of this utility model.

[0022] Figure label:

[0023] 1. Handle base; 2. Guide groove; 3. Locking pin; 4. Blind hole; 5. Spring; 6. First guide post; 7. Through hole; 8. Pressing part; 9. Handle bracket; 10. Second guide post; 11. Limiting protrusion; 12. Guide slope; 13. Handle housing; 14. Limiting stop; 15. Guide protrusion; 16. Locking groove; 17. Housing body; 18. First opening; 19. Second opening; 20. Buckle groove. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0025] Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts disclosed in this invention.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of methods and systems consistent with some aspects of the invention as detailed in the appended claims.

[0028] like Figure 1-5 As shown, an electric wheelchair battery pack unlocking mechanism includes a battery housing 17 and a handle housing 13. The handle housing 13 is disposed on the upper part of the battery housing 17 and also includes a locking pin 3 and a pressing part 8. The top surface of the handle housing 13 is provided with a first opening 18 for the pressing part 8 to move vertically, and the two sides of the handle housing 13 are respectively provided with a second opening 19 for the locking pin 3 to move horizontally. When the pressing part 8 is pressed, the locking pin 3 retracts into the handle housing 13.

[0029] Furthermore, the battery housing 17 and the handle housing 13 are fixedly connected by the handle base 1. The handle base 1 has an upwardly raised buckle groove 20 in the middle, and a guide groove 2 is provided on each side of the buckle groove 20. A first guide post 6 is horizontally provided on the inner wall of the guide groove 2. The locking pin 3 is provided with a blind hole 4, and the first guide post 6 is inserted into the blind hole 4.

[0030] Furthermore, the first guide post 6 is provided with a spring 5, the diameter of which is larger than that of the blind hole 4. The two ends of the spring 5 abut against the locking pin 3 and the inner wall of the guide groove 2, respectively. The locking pin 3 can compress the spring 5 to move horizontally along the first guide post 6.

[0031] Furthermore, a handle bracket 9 is provided between the handle housing 13 and the handle base 1; the pressing part 8 is provided on the top surface of the handle bracket 9, and through holes 7 are provided on both sides of the pressing part 8; a second guide post 10 is vertically provided on the top surface of the buckle groove 20, the second guide post 10 passes through the through hole 7, and the top end of the second guide post 10 is connected to the handle housing 13, limiting the range of movement of the handle bracket 9 between the handle housing 13 and the handle base 1; when the pressing part 8 is pressed, the handle bracket 9 can slide along the second guide post 10.

[0032] Furthermore, the locking pin 3 is provided with a limiting protrusion 11, and the handle bracket 9 is provided with a guide slope 12 that gradually slopes downward from the inside to the outside; the guide slope 12 abuts against the limiting protrusion 11 so that when the handle bracket 9 slides along the second guide post 10, it drives the locking pin 3 to move horizontally along the first guide post 6.

[0033] Furthermore, the end of the guide slope 12 extends inward to form a limiting block 14, so that when the spring 5 is overextended, the lower end face of the limiting protrusion 11 abuts against the limiting block 14, thus preventing the locking pin 3 from disengaging from the first guide post 6.

[0034] The detachable battery pack is installed on the electric wheelchair. The locking pin 3 extends beyond the second opening 19 on both sides of the handle housing 13 to secure the battery pack. When the battery pack needs to be removed for charging, the user presses the pressing part 8, causing the handle bracket 9 to move vertically downward along the first guide post 6. Under the pressure of the guide slope 12 that gradually slopes downward from the inside to the outside at the bottom of the handle bracket 9, the limiting protrusion 11 of the locking pin 3 converts the vertical pressing force into a horizontal pushing force on the locking pin 3, causing the locking pin 3 to squeeze the spring 5 and move along the second guide post 10 towards the inner wall of the guide groove 2, thereby unlocking the battery pack. After releasing the pressing part 8, the spring 5 automatically rebounds, pushing the locking pin 3 away from the inner wall of the guide groove 2 along the second guide post 10, thereby completing the reset of the locking pin 3 and locking the battery pack.

[0035] The top of the handle housing 13 is provided with an opening for the vertical movement of the pressing part 8, and the top of the second guide post 10 is connected to the housing 13 to limit the movement range of the handle bracket 9 and prevent the handle bracket 9 from detaching from the second guide post 10 due to the excessive extension of the spring 5. Similarly, the end of the guide slope 12 extends inward to the limit stop 14. When the spring 5 is overextended, the locking pin 3 moves away from the inner wall of the guide groove 2 along the guide slope 12. When the lower end face of the limit protrusion 11 abuts against the limit stop 14, the movement stops, limiting the movement range of the locking pin 3 and preventing improper operation from causing the locking pin 3 to detach from the first guide post 6, thereby damaging the battery pack unlocking structure.

[0036] Furthermore, the upper wall of the guide groove 2 is provided with a guide protrusion 15, and the locking pin 3 is provided with a locking groove 16 that slides with the guide protrusion 15.

[0037] Furthermore, the angle between the guide ramp 12 and the first guide post 6 is 20 to 70 degrees.

[0038] Preferably, the angle between the guide slope 12 and the first guide post 6 is 45 degrees.

[0039] like Figure 4-5 As shown, the inner wall of the guide groove 2 is preferably provided with a guide protrusion 15, and the locking pin 3 is provided with a matching locking groove 16. When the locking pin 3 compresses the spring 5 and moves along the second guide post 10 toward the inner wall of the guide groove 2, with the locking pin 3 as a reference, the guide protrusion 15 moves along the locking groove 16 to form a physical limiting channel, effectively constraining the movement trajectory of the locking pin 3. The slope of the guide inclined surface 12 is designed to be 20 to 70 degrees, preferably 45 degrees. When the user presses the pressing part 8, the vertical pressing force on the handle bracket 9 can be efficiently converted into a horizontal thrust on the locking pin 3, maximizing the avoidance of force loss in the mechanical device. In conjunction with the aforementioned design, the direction and magnitude of the thrust are controlled to achieve the accuracy of battery pack unlocking.

[0040] Preferably, the lower part of the battery housing 17 is provided with several slots for securing the detachable battery pack to the electric wheelchair and preventing it from shaking. The slots are wider at the bottom and narrower at the top, facilitating the insertion and removal of the battery pack.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the protection scope of the present invention.

Claims

1. An unlocking mechanism for an electric wheelchair battery pack, comprising a battery housing (17) and a handle housing (13), wherein the handle housing (13) is disposed on the upper part of the battery housing (17), characterized in that: It also includes a locking pin (3) and a pressing part (8). The top surface of the handle housing (13) is provided with a first opening (18) for the pressing part (8) to move vertically, and the two sides of the handle housing (13) are respectively provided with a second opening (19) for the locking pin (3) to move horizontally. When the pressing part (8) is pressed, the locking pin (3) retracts into the handle housing (13).

2. The electric wheelchair battery pack unlocking mechanism according to claim 1, characterized in that: The battery housing (17) and the handle housing (13) are fixedly connected by the handle base (1). The handle base (1) has an upwardly raised buckle groove (20) in the middle, and a guide groove (2) is provided on each side of the buckle groove (20). A first guide post (6) is horizontally provided on the inner wall of the guide groove (2). The locking pin (3) has a blind hole (4), and the first guide post (6) is inserted into the blind hole (4).

3. The electric wheelchair battery pack unlocking mechanism according to claim 2, characterized in that: The first guide post (6) is provided with a spring (5), the diameter of the spring (5) is larger than the blind hole (4), and the two ends of the spring (5) abut against the locking pin (3) and the inner wall of the guide groove (2) respectively. The locking pin (3) can squeeze the spring (5) to move horizontally along the first guide post (6).

4. The electric wheelchair battery pack unlocking mechanism according to claim 3, characterized in that: A handle bracket (9) is also provided between the handle housing (13) and the handle base (1); the pressing part (8) is provided on the top surface of the handle bracket (9), and through holes (7) are provided on both sides of the pressing part (8); a second guide post (10) is vertically provided on the top surface of the buckle groove (20), the second guide post (10) passes through the through hole (7), and the top end of the second guide post (10) is connected to the handle housing (13), limiting the range of movement of the handle bracket (9) between the handle housing (13) and the handle base (1); when the pressing part (8) is pressed, the handle bracket (9) can slide along the second guide post (10).

5. The electric wheelchair battery pack unlocking mechanism according to claim 4, characterized in that: The locking pin (3) is provided with a limiting protrusion (11), and the handle bracket (9) is provided with a guide slope (12) that gradually slopes downward from the inside to the outside; the guide slope (12) abuts against the limiting protrusion (11) so that when the handle bracket (9) slides along the second guide post (10), it drives the locking pin (3) to move horizontally along the first guide post (6).

6. The electric wheelchair battery pack unlocking mechanism according to claim 5, characterized in that: The end of the guide slope (12) extends inward to a limiting block (14) so ​​that when the spring (5) is overstretched, the lower end face of the limiting protrusion (11) abuts against the limiting block (14) to restrict the locking pin (3) from disengaging from the first guide post (6).

7. The electric wheelchair battery pack unlocking mechanism according to claim 6, characterized in that: The upper wall of the guide groove (2) is provided with a guide protrusion (15), and the locking pin (3) is provided with a locking groove (16) that slides with the guide protrusion (15).

8. The electric wheelchair battery pack unlocking mechanism according to claim 7, characterized in that: The angle between the guide ramp (12) and the first guide post (6) is 20 to 70 degrees.

9. The electric wheelchair battery pack unlocking mechanism according to claim 8, characterized in that: The angle between the guide ramp (12) and the first guide post (6) is 45 degrees.

10. The electric wheelchair battery pack unlocking mechanism according to claim 1, characterized in that: The lower part of the battery casing (17) is provided with several slots.

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