Wheelchair locking device

Abstract

The utility model discloses a wheel chair locking device which is characterized in that a concave cavity is formed in the top of a base from outside to inside, an elastic reset device is fixed at the inner bottom of the concave cavity, a lifting locking device is arranged above the elastic reset device, and the lifting locking device is arranged in the concave cavity; the side wall of the base is provided with a pedal piece penetrating hole from outside to inside, the inner section of the pedal device penetrates into the base from the pedal piece penetrating hole, the outer section of the pedal device is arranged outside, the inner end of the pedal device is movably connected with a transverse penetrating shaft in a penetrating mode, and the transverse penetrating shaft is fixedly connected with the base in an anti-disengaging mode. The middle section of the pedal device is fixedly connected with the lifting locking device; the top of the base extends upwards to form a rear upward convex wall body; in a normal state, the elastic reset device jacks up the lifting locking device, so that a locking groove is formed between the upper section of the lifting locking device and the rear upward convex wall body, and the lock catch frame falls into the locking groove to form locking; the lifting locking device is driven to descend by externally treading the pedal device, and the lock catch frame is unlocked; the product is convenient for old, weak and sick people to stand and unlock with feet.

Description

Technical Field

[0001] The utility model relates to wheelchair components, in particular to a wheelchair locking device. Background Art

[0002] 1. Chinese Patent Document Publication No.: CN210250325U discloses a foldable wheelchair, which includes a left front foot rod, a right front foot rod, a left rear foot rod, a right rear foot rod, a seat back frame, and a seat; the bottom end of the seat back frame is movably connected to the rear end of the seat; the bottom ends of the left front foot rod, the right front foot rod, the left rear foot rod, and the right rear foot rod are all connected to casters; a front cross bar is connected between the left front foot rod and the right front foot rod, the upper end of the left front foot rod is movably connected to the left front end of the back side of the seat, and the upper end of the right front foot rod is movably connected to the right front end of the back side of the seat; the left rear foot rod and the right rear foot rod are inclined from the back to the front, and the upper end of the left rear foot rod is movably connected to the left front end of the back side of the seat The end is movably connected to the left front end of the back of the seat, and the upper end of the right rear foot rod is movably connected to the right front end of the back of the seat; the left and right sides of the bottom end of the chair back frame are movably connected with the left front hinge piece and the right front hinge piece respectively, and the other ends of the left hinge piece and the right hinge piece are movably connected to the corresponding lower sections of the left front foot rod and the right front foot rod; the left and right sides of the bottom end of the chair back frame are movably connected with the left rear hinge piece and the right rear hinge piece respectively, and the left rear hinge piece and the right rear hinge piece are movably connected to the corresponding lower ends of the left rear foot rod and the right rear foot rod; the left rear foot rod and the right rear foot rod are both connected and fixed with a left supporting member and a right supporting member supporting the corresponding left rear hinge piece and the right rear hinge piece. The bottom ends of the left and right rear foot rods are each provided with a protrusion corresponding to a left and right protrusion, which are hingedly connected to the corresponding left and right rear hinge plates. The tops of the left and right support members are each provided with a positioning groove, and in normal use, the left and right rear hinge plates are positioned in the positioning groove. A locking member is connected to the left or right support member.

[0003] The above-mentioned product belongs to the same type of product in application. Its locking parts are set at the rear bottom of the left rear foot rod and the right rear foot rod. When locking and unlocking, people need to squat or bend over and then flip the lock and unlock by hand. It is inconvenient for some elderly, weak and disabled people to squat or bend over, which brings inconvenience to locking and unlocking the wheelchair after it is unfolded. Moreover, the locking parts are of a flip-fastening structure, which requires a certain amount of force to fasten and fix stably. Sometimes the fasteners are not tight enough and are easy to fall out when the wheelchair vibrates when being pushed, which brings risks to the use of the wheelchair.

[0004] 2. Chinese Patent Publication No. CN215739988U discloses a novel folding wheelchair comprising a seat and a backrest, the backrest being hingedly connected to the seat. Front and rear leg rods are symmetrically arranged on the left and right sides below the seat, with a linkage frame disposed between the rear leg rods. The upper ends of the front and rear leg rods are hingedly connected to the seat. The upper end of the linkage frame is hingedly connected to the backrest, and the lower end is hingedly connected to the rear leg rods. The seat comprises a seat frame having a seat plate fixedly connected thereto. The backrest comprises a backrest frame having a back plate fixedly connected thereto. The ends of the seat frame are hingedly connected to the backrest frame. Armrest frames are disposed on the left and right sides of the backrest frame, and the armrests are hingedly connected to the armrests. The backrest frame comprises an extension tube connected at its lower end. The upper end of the linkage frame is hingedly connected to the seat back via a first screw, and the lower end is hingedly connected to the rear leg rods via a second screw. A limit block is provided at the lower end of the extension tube, which is movably pressed against the rear leg rod. The rear leg rod has a curved surface. The limit block includes a curved panel that matches the shape of the curved surface and a locking bolt that extends through and connects to the rear leg rod and the curved panel. A third screw is provided on the extension tube, which is rotatably connected to a clamping member with a bayonet. The rear leg rod is provided with a staple. When the foldable wheelchair is in the unfolded state, the bayonet engages with the staple.

[0005] The above-mentioned product belongs to the same type of product. Its clips and pins are set on the left and right lower sides of the wheelchair. When locking and unlocking, people need to squat or bend over and then flip the lock and unlock by hand. It is inconvenient for some elderly, weak and disabled people to squat or bend over, which brings inconvenience to locking and unlocking the wheelchair after it is unfolded. Moreover, the clips and pins cooperate with the flip-locking structure, and a certain force is required to fasten the clips to the pins. Sometimes the buckle is not tight enough and it is easy to fall out when the wheelchair vibrates when being pushed, which brings risks to the use of the wheelchair. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a wheelchair locking device with reasonable structural design and convenient locking and unlocking.

[0007] The solutions to the above technical problems are:

[0008] The wheelchair locking device comprises a base, an elastic reset device, a lifting locking device, a foot pedal device, and a locking frame, wherein the top of the base is provided with a concave cavity from the outside to the inside, the inner bottom of the concave cavity is fixed with an elastic reset device, a lifting locking device is provided above the elastic reset device, and the lifting locking device is provided in the concave cavity; the side wall of the base is provided with a foot pedal through-hole from the outside to the inside, the inner section of the foot pedal device penetrates into the inner part of the base through the foot pedal through-hole, and the outer section is arranged on the outside, the inner end of the foot pedal device is movably connected with a cross shaft, and the cross shaft is fixedly connected to the base to prevent it from falling off; the middle section of the foot pedal device is fixedly connected to the lifting locking device; the top of the base is extended upward with a rear upper convex wall body; under normal circumstances, the elastic reset device pushes up the lifting locking device, so that a lock groove is formed between the upper section of the lifting locking device and the rear upper convex wall body, and the lock frame falls into the lock groove to form a lock; the lifting locking device is driven down by external stepping on the foot pedal device, and the lock frame is unlocked.

[0009] The beneficial effects of the wheelchair locking device of the utility model are as follows: the product has a reasonable structure, and can be unlocked by stepping on the foot pedal without squatting or bending over or unlocking with hands. It is convenient for the elderly, the weak and the sick to unlock with their feet while standing, and is more suitable for people who are inconvenient to squat or bend over or use their hands, thereby improving the unlocking efficiency and facilitating use; it is also very convenient when locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 、 Figure 2 A three-dimensional diagram of the product of the utility model;

[0011] Figure 3 This is the front view of the product of this utility model;

[0012] Figure 4 This is a rear view of the product of the utility model;

[0013] Figure 5 This is a right side view of the product of the utility model;

[0014] Figure 6 This is a left side view of the product of the utility model;

[0015] Figure 7 This is a bottom view of the product of the utility model;

[0016] Figure 8 A top view of the product of the utility model;

[0017] Figure 9 For Figure 8 Cross-sectional view in the AA direction;

[0018] Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 、 Figure 14 、 Figure 15 、 Figure 16 This is a front perspective view of the product of the utility model;

[0019] Figure 17 、 Figure 18 A three-dimensional diagram of the inverted configuration of the product of the utility model;

[0020] Figure 19 、 Figure 20 This is a disassembled diagram of the inverted setting of the utility model product.

[0021] Base 1, concave cavity 11, pedal piece through-hole 12, rear upper convex wall 13, left lifting limit long through hole 14, right lifting limit long through hole 15, horizontal mounting groove 16, elastic reset device 2, pressure elastic component 21, lifting locking device 3, lifting sliding component 31, cross bar shaft 32, pedal device 4, pedal 41, left pedal long strip 42, left piece middle section axis hole 421, left piece inner end axis hole 422, right pedal long strip 43, right piece middle section axis hole 431, right piece inner end axis hole 432, cross shaft 401, locking frame 5, left solid rod 51, bottom cross bar 52, right solid rod 53, lock slot 6, metal bottom plate 7, horizontal axis core A, axis core rod B. DETAILED DESCRIPTION

[0022] like Figures 1 to 16As shown: A wheelchair locking device includes a base 1, an elastic reset device 2, a lifting locking device 3, a footrest device 4, and a locking frame 5; the base 1 is made of plastic; the locking frame 5 is fixedly connected and installed on the bottom of the folding wheelchair backrest by a nut assembly or welding; the base 1 is fixedly connected and installed on the rear crossbeam of the rear leg frame of the folding wheelchair by a nut and screw assembly; the top of the base 1 is provided with a concave cavity 11 from the outside to the inside, the inner bottom of the concave cavity 11 is fixed with an elastic reset device 2, and a lifting locking device 3 is provided above the elastic reset device 2, and the lifting locking device 3 is provided in the concave cavity 11; the side wall of the base 1 is provided with a footrest through hole 12 from the outside to the inside, and the footrest is inserted into the through hole 12. The hole 12 is connected to the concave cavity 11, the inner section of the pedal device 4 passes through the pedal plate through the hole 12 into the interior of the base 1, and the outer section is arranged on the outside. The inner end of the pedal device 4 is movably connected with a cross shaft 401, and the cross shaft 401 is fixedly connected to the base 1 to prevent it from falling off; the middle section of the pedal device 4 is fixedly connected to the lifting and locking device 3; the top of the base 1 extends upward with a rear upper convex wall 13; under normal conditions, the elastic reset device 2 lifts the lifting and locking device 3, the pedal device 4 rises, and the upper section of the lifting and locking device 3 protrudes from the cavity mouth, so that a lock groove 6 is formed between the upper section of the lifting and locking device 3 and the rear upper convex wall 13, the lock frame 5 falls into the lock groove 6 to form a lock, and the upper section of the lifting and locking device 3 protrudes The lifting and locking device 3 is retracted into the concave cavity 11, and the upper protruding part of the lifting and locking device 3 no longer clamps the lock frame 5 with the rear upper convex wall 13, and the upper section of the lifting and locking device 3 no longer prevents the lock frame 5 from escaping from the front. When the wheelchair is folded, the locking frame 5 is unlocked, and the bottom of the folding wheelchair backrest and the rear leg frame of the folding wheelchair are unlocked, so that the wheelchair can be folded. During operation, the foot pedal 4 will rise and fall with the lifting and locking device 3. When the person stops stepping on the foot pedal 4 to press it down, the elastic reset device 2 rebounds and lifts the lifting and locking device 3 up, which is a normally locked state, preventing people from forgetting to lock and keeping the automatic locking state at all times. The above structure is reasonably set up, and the wheelchair can be unlocked by stepping on the foot pedal 4. There is no need for people to squat or bend over or unlock with their hands. It is convenient for the elderly, the weak and the sick to unlock with their feet while standing, and it is more suitable for people who are not convenient to squat or bend over or use their hands, which improves the unlocking efficiency and is convenient to use. It is also very convenient to lock.

[0023] Preferably, the elastic reset device 2 is a pressure elastic component 21, which is composed of at least two pressure elastic components. This structure is low in cost, universal, elastic, and easy to install.

[0024] The lifting and locking device 3 includes a lifting sliding component 31 and a crossbar shaft 32; the concave cavity 11 is rectangular, and the lifting sliding component 31 is also rectangular, with the shape being adapted and just right; the body of the lifting sliding component 31 crosses the fixed crossbar shaft 32 (that is, the body of the lifting sliding component 31 is laterally provided with an axis core hole, the axis core hole crosses and tightly fixes the crossbar shaft 32, the crossbar shaft 32 is made of metal, and the lifting sliding component 31 and the axis core hole are integrally injection molded), and the left and right ends of the crossbar shaft 32 protrude externally, protruding about 2 cm ~3 cm; a pressure elastic component 21 is clamped between the bottom of the lifting sliding member 31 and the bottom wall of the concave cavity 11, and the pressure elastic component 21 is upright and fixed; under normal conditions, the pressure elastic component 21 uses the elasticity of stretching and restoring to move the top of the lifting sliding member 31, and a lock groove 6 is formed between the upper protruding cavity opening of the lifting sliding member 31 and the rear upper protruding wall 13, and the lock groove 6 just fits the lock frame 5 without being loose; the above is the specific structure of the lifting locking device 3, which is simple, easy to install, smooth lifting, low cost, and flexible lifting;

[0025] The pedal device 4 includes a foot pedal 41, a left foot pedal strip 42, and a right foot pedal strip 43. The foot pedal 41 is an integral injection molding; the left foot pedal strip 42 and the right foot pedal strip 43 have the same shape and structure, are integrally stamped and made of metal, such as steel; the foot pedal 41 is fixedly connected to the outer sections of the left foot pedal strip 42 and the right foot pedal strip 43 (the outer sections of the left foot pedal strip 42 and the right foot pedal strip 43 are integrally injection molded and fixed to the foot pedal 41); the left and right sides of the front side wall of the base 1 are provided with foot pedal connecting holes 12 from the outside to the inside, a total of two foot pedal connecting holes 12, one on each side, the foot pedal connecting holes 12 are vertically strip-shaped, and the height of the foot pedal connecting holes 12 is 3 cm to 4 cm. The left pedal strip 42 and the right pedal strip 43 provide space for lifting. The left pedal strip 42 and the right pedal strip 43 respectively penetrate into the interior of the base 1 from the corresponding left and right pedal strip penetration holes 12. The inner ends of the left pedal strip 42 and the right pedal strip 43 are movably connected with a cross shaft 401 to prevent them from falling off. There are two cross shafts 401, and the cross shaft 401 is tightly fixedly connected to the base 1 to prevent them from falling off. The cross shaft 401 can also be used as one, and the inner ends of the left pedal strip 42 and the right pedal strip 43 are movably connected to the same cross shaft 401. One or two cross shafts are set as needed. The cross shaft 401 is made of metal. The above is the specific structure of the pedal device 4. The structure is simple, easy to install, smooth and flexible to step on and lift, and balanced to lift.

[0026] The left end of the crossbar shaft 32 is fixedly connected to the middle section of the left pedal strip 42, and the fixed connection method is not limited here; the right end of the crossbar shaft 32 is fixedly connected to the middle section of the right pedal strip 43, and the fixed connection method is not limited here.

[0027] Preferably, the middle sections of the left pedal strip 42 and the right pedal strip 43 are respectively provided with corresponding left piece middle section axis holes 421 and right piece middle section axis holes 431, and the left piece middle section axis holes 421 and the right piece middle section axis holes 431 are integrally stamped with the corresponding left pedal strip 42 and the right pedal strip 43; the left end of the cross bar shaft 32 passes through the left piece middle section axis hole 421 and is fixedly connected to the middle section of the left pedal strip 42, which just fits, and the right end of the cross bar shaft 32 passes through the right piece middle section axis hole 431 and is fixedly connected to the middle section of the right pedal strip 43, which just fits; the left piece middle section axis holes 421 and the right piece middle section axis holes 431 are provided to facilitate the insertion of the cross bar shaft 32, improve installation efficiency, and have better fixation.

[0028] Preferably: the left and right side walls of the base 1 are respectively provided with corresponding left lifting limit long through hole 14 and right lifting limit long through hole 15, the left end of the cross bar shaft 32 is connected to the left lifting limit long through hole 14, and the right end of the cross bar shaft 32 is connected to the right lifting limit long through hole 15, to prevent the lifting sliding component 31 from excessively descending or ascending, and to ascend and descend within the range of the left lifting limit long through hole 14 and the right lifting limit long through hole 15, and at the same time, it is also convenient to penetrate and install the cross bar shaft 32.

[0029] Preferably: the inner ends of the left pedal strip 42 and the right pedal strip 43 are respectively provided with corresponding left piece inner end shaft hole 422 and right piece inner end shaft hole 432, and the left piece inner end shaft hole 422 and the right piece inner end shaft hole 432 are both movably connected with the cross shaft 401, which is just right. The left piece inner end shaft hole 422 and the right piece inner end shaft hole 432 are provided to facilitate the insertion of the cross shaft 401, thereby improving installation efficiency.

[0030] Preferably: the lock frame 5 is made of a metal rod and is integrally formed by a metal processing machine; the lock frame 5 is U-shaped, including a left solid rod 51, a bottom cross rod 52, and a right solid rod 53, and the two ends of the bottom cross rod are bent and connected to form a left solid rod and a right solid rod; the length of the bottom cross rod is 3 cm to 5 cm to increase the connection area with the inner wall of the lock groove 6, and the clamping connection is more stable; the height of the left solid rod and the right solid rod is 3 cm to 5 cm; the upper sections of the left solid rod and the right solid rod are fixedly connected and installed on the bottom of the folding wheelchair backrest by nut assemblies or welding.

[0031] Preferably, the base 1 is provided with a transverse mounting groove 16, which is adapted to the rear crossbeam of the rear leg frame of the folding wheelchair, making it easier to align the mounting position and making the connection more secure.

[0032] Preferably, a metal bottom plate 7 is clamped between the bottom of the lifting sliding component 31 and the pressure elastic component 21. The metal bottom plate 7 cooperates with the steel pressure elastic component 21 to increase wear resistance and prevent the bottom of the plastic lifting sliding component 31 from being worn by the pressure elastic component 21.

[0033] Another solution:

[0034] like Figures 17 to 20 As shown: the base 1, the elastic reset device 2, the lifting and locking device 3, the pedal device 4, and the locking frame 5 are all inverted;

[0035] The pedal device 4 includes a foot pedal 41, a left foot pedal strip 42, and a right foot pedal strip 43; foot pedal piece connection holes 12 are opened on the left and right sides of the rear wall of the base 1, and the left foot pedal strip 42 and the right foot pedal strip 43 are inserted into the concave cavity 11 from the corresponding left and right foot pedal piece connection holes 12, and the left and right sides of the lifting locking device 3 are fixedly connected by a horizontal axis core A; the rear wall of the base 1 is integrally crossed by an axis core rod B, and the axis core rod B crosses the left foot pedal strip 42 and the right foot pedal strip 43. The left foot pedal strip 42 and the right foot pedal strip 43 are movably connected with the axis core rod B, and the axis core rod B is equivalent to a lever fulcrum. Using the principle of leverage, the lifting locking device 3 is raised and lowered by stepping on the foot pedal 41 from the outside, thereby locking and unlocking the lock frame 5.

Claims

1. A wheelchair locking device, comprising a base, an elastic reset device, a lifting and locking device, a pedal device, and a locking frame, characterized in that: The top of the base is provided with a concave cavity from the outside to the inside, and an elastic reset device is fixed to the inner bottom of the concave cavity, and a lifting locking device is provided above the elastic reset device, and the lifting locking device is provided in the concave cavity; a foot pedal through-hole is provided on the side wall of the base from the outside to the inside, the inner section of the foot pedal device passes through the foot pedal through-hole into the interior of the base, and the outer section is arranged on the outside, and a cross shaft is movably passed through the inner end of the foot pedal device, and the cross shaft is fixedly connected to the base to prevent it from falling off; the middle section of the foot pedal device is fixedly connected to the lifting locking device; a rear upper convex wall body is extended upward from the top of the base; under normal circumstances, the elastic reset device lifts the lifting locking device, so that a lock groove is formed between the upper section of the lifting locking device and the rear upper convex wall body, and the lock frame falls into the lock groove to form a lock; the lifting locking device is driven down by stepping on the foot pedal device from the outside, and the lock frame is unlocked.

2. A wheelchair locking device according to claim 1, characterized in that: The elastic reset device is a pressure elastic component; The lifting and locking device includes a lifting sliding component and a crossbar shaft. The main body of the lifting sliding component crosses the fixed crossbar shaft, and the left and right ends of the crossbar shaft protrude externally. A pressure elastic component is clamped between the bottom of the lifting sliding component and the bottom wall of the cavity; under normal conditions, the pressure elastic component forms a locking groove between the top of the lifting sliding component, the upper protruding cavity opening of the lifting sliding component and the rear upper protruding wall; The pedal device includes a foot pedal, a left foot pedal strip, and a right foot pedal strip, wherein the foot pedal is fixedly connected to the outer sections of the left foot pedal strip and the right foot pedal strip; the left and right side walls of the base are provided with foot pedal insertion holes from the outside to the inside, with a total of two foot pedal insertion holes, one on each side, and the foot pedal insertion holes are arranged in a vertical strip shape. The left foot pedal strip and the right foot pedal strip are respectively inserted into the interior of the base through the corresponding left and right foot pedal insertion holes, and the inner ends of the left foot pedal strip and the right foot pedal strip are movably connected with a transverse shaft; The left end of the crossbar shaft is fixedly connected to the middle section of the left pedal strip, and the right end of the crossbar shaft is fixedly connected to the middle section of the right pedal strip.

3. The wheelchair locking device according to claim 2, characterized in that: The middle sections of the left pedal strip and the right pedal strip are respectively provided with corresponding left section middle section axis holes and right section middle section axis holes. The left end of the cross bar shaft passes through the left section middle section axis hole and is fixedly connected to the middle section of the left pedal strip, and the right end of the cross bar shaft passes through the right section middle section axis hole and is fixedly connected to the middle section of the right pedal strip.

4. A wheelchair locking device according to claim 3, characterized in that: The left and right side walls of the base are respectively provided with a corresponding left lifting limit long through hole and a right lifting limit long through hole. The left end of the cross bar shaft is connected to the left lifting limit long through hole, and the right end of the cross bar shaft is connected to the right lifting limit long through hole.

5. The wheelchair locking device according to claim 2, characterized in that: The inner ends of the left pedal strip and the right pedal strip are respectively provided with corresponding left piece inner end shaft holes and right piece inner end shaft holes, and the left piece inner end shaft holes and the right piece inner end shaft holes are both movably connected with a cross shaft.

6. A wheelchair locking device according to any one of claims 1 to 5, characterized in that: The lock frame is made of a metal rod and is integrally formed; the lock frame is U-shaped and includes a left solid rod, a bottom cross rod, and a right solid rod.

7. A wheelchair locking device according to any one of claims 1 to 5, characterized in that: The base is provided with a transverse mounting groove.

8. The wheelchair locking device according to claim 2, characterized in that: A metal bottom plate is clamped between the bottom of the lifting sliding component and the pressure elastic component.

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