A rehabilitation training seat and a seat caster linkage locking and unlocking device

Abstract

The utility model discloses a rehabilitation training seat and seat caster linkage locking and unlocking device relates to the technical field of rehabilitation apparatus, and the seat caster linkage locking and unlocking device includes: operation transmission shaft is used for connecting the seat caster of front and rear two ends of the same side of seat, and the caster transmission shaft of seat caster is connected in the end of operation transmission shaft through universal joint, transmission mechanism is established between the operation transmission shaft of seat two sides, is used for controlling two operation transmission shaft synchronous rotation, and the locking pedal and unlocking pedal of lateral are established in seat, and one of two sets up on operation transmission shaft, and the other is connected with operation transmission shaft through reversing transmission mechanism to drive operation transmission shaft bidirectional rotation, therefore can complete the locking or unlocking of all seat casters through treading locking pedal or unlocking pedal synchronously, and the operation is convenient, and two pedals are established in the lateral of seat, and enough foot space is reserved in the front of seat, and the use comfort degree is high.

Description

Technical Field

[0001] This utility model relates to the field of rehabilitation equipment technology, and more specifically, to a seat caster linkage locking and unlocking device. Furthermore, this utility model also provides a rehabilitation training chair including the aforementioned seat caster linkage locking and unlocking device. Background Technology

[0002] Existing rehabilitation training chairs either have each caster controlled independently, requiring each caster to be locked or unlocked individually, which is cumbersome; or although the bottom casters are connected by a linkage locking and unlocking mechanism, the linkage locking and unlocking mechanism is large and takes up a lot of space at the front of the chair, resulting in no legroom at the front of the chair. This not only seriously affects the user experience, but also makes the rehabilitation training chair heavy and slow to move.

[0003] In summary, how to provide a linkage locking and unlocking device that simultaneously controls the locking and unlocking of multiple seat casters is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a seat caster linkage locking and unlocking device, which can lock or unlock all seat casters simultaneously by stepping on the locking pedal or unlocking pedal. It is easy to operate, and the two pedals are located on the side of the seat, leaving enough space for retracting and extending the feet in front of the seat, resulting in high comfort.

[0005] In addition, this utility model also provides a rehabilitation training chair that includes the above-mentioned seat caster linkage locking and unlocking device.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A seat caster linkage locking and unlocking device includes:

[0008] An operating drive shaft is used to connect the seat casters at the front and rear ends on the same side of the seat. The caster drive shafts of the seat casters are connected to the end of the operating drive shaft via a universal joint.

[0009] A transmission mechanism is located between the operating transmission shafts on both sides of the seat, and is used to control the synchronous rotation of the two operating transmission shafts;

[0010] A locking pedal and an unlocking pedal are located on the side of the seat. One of them is mounted on the operating drive shaft, and the other is connected to the operating drive shaft through a reversing transmission mechanism so as to drive the operating drive shaft to rotate in both directions.

[0011] Preferably, one end of the caster drive shaft is provided with a mating part for engaging with the operating hole of the seat caster, and the other end of the caster drive shaft is connected to the universal joint.

[0012] Preferably, the reversing transmission mechanism includes a reversing transmission shaft, a driving reversing gear, and a driven reversing gear. The reversing transmission shaft is arranged parallel to the outside of the operating transmission shaft. The driving reversing gear is sleeved on the outside of the reversing transmission shaft, and the driven reversing gear is sleeved on the outside of the operating transmission shaft. The driving reversing gear and the driven reversing gear are meshed and connected.

[0013] Preferably, the transmission mechanism includes a transmission chain and sprockets, with the two sprockets respectively sleeved on the two operating transmission shafts, and the transmission chain meshing and sleeved on the two sprockets.

[0014] Preferably, the locking pedal and the unlocking pedal are mounted on the same side of the operating drive shaft.

[0015] Preferably, the operating transmission shafts on both sides of the seat are provided with a locking pedal and an unlocking pedal, and the locking pedal and the unlocking pedal are evenly arranged about a vertical symmetrical plane perpendicular to the length direction of the seat.

[0016] Preferably, the operating drive shaft is arranged parallel to the length direction of the seat, the seat casters are arranged inclined to the operating drive shaft, and the universal joint includes multiple universal joints to facilitate the inclined connection between the caster drive shaft and the operating drive shaft.

[0017] Preferably, the locking pedal and the operating transmission shaft are key-connected, and the unlocking pedal is connected to the operating transmission shaft through the reversing transmission mechanism;

[0018] When the locking pedal is pressed down, the locking pedal drives the operating transmission shaft to rotate, and the operating transmission shaft drives the unlocking pedal to reset through the reversing transmission mechanism;

[0019] When the unlock pedal is pressed down, the unlock pedal drives the operating transmission shaft to rotate in the opposite direction through the reversing transmission mechanism, and the operating transmission shaft drives the locking pedal to reset.

[0020] Preferably, both the locking pedal and the unlocking pedal include a pedal, a connecting rod, and a mounting sleeve. One end of the connecting rod is perpendicular to the pedal, and the other end of the connecting rod is provided with a mounting sleeve for connecting to the operating drive shaft or the reversing drive shaft of the reversing drive mechanism.

[0021] A rehabilitation training chair includes a chair body, the bottom of which is provided with a plurality of chair casters, which are connected by a chair caster linkage locking and unlocking device as described above.

[0022] The seat caster linkage locking and unlocking device provided by this utility model can directly drive the operating transmission shaft to rotate in the forward direction through the locking pedal and the unlocking pedal, or drive the operating transmission shaft to rotate in the reverse direction through the reversing transmission mechanism, thereby driving the seat casters at both ends of the front and rear on the same side of the seat to lock or unlock simultaneously. At the same time, the operating transmission shaft can drive the operating transmission shaft on the other side to rotate synchronously through the transmission mechanism, thereby driving the seat casters at both ends of the front and rear on the other side of the seat to lock or unlock simultaneously.

[0023] Therefore, the seat caster linkage locking and unlocking device provided by this utility model can lock or unlock all seat casters simultaneously through a single step operation, which is convenient to operate. At the same time, the locking pedal and unlocking pedal are located on the side of the seat, leaving enough space for retracting and extending the feet in front of the seat, resulting in high comfort.

[0024] In addition, this utility model also provides a rehabilitation training chair that includes the above-mentioned seat caster linkage locking and unlocking device. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 A schematic diagram of a specific embodiment of the seat caster linkage locking and unlocking device provided by this utility model;

[0027] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0028] Figure 3 for Figure 1 A top-down view;

[0029] Figure 4 This is a side view of the rehabilitation training chair provided by this utility model.

[0030] Figures 1-4 middle:

[0031] 10-Seat body; 20-Seat casters; 30-Mounting base plate; 1-Caser drive shaft; 2-Universal joint; 3-Operating drive shaft; 4-Locking pedal; 5-Unlocking pedal; 6-Reversing drive mechanism; 61-Reversing drive shaft; 62-Active reversing gear; 63-Passive reversing gear; 71-Sprocket; 72-Drive chain; 8-Bearing seat. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] The core of this utility model is to provide a seat caster linkage locking and unlocking device, which can lock or unlock all seat casters simultaneously by stepping on the locking pedal or unlocking pedal. It is easy to operate, and the two pedals are located on the side of the seat, leaving enough space for retracting and extending the feet in front of the seat, resulting in high comfort.

[0034] In addition, this utility model also provides a rehabilitation training chair that includes the above-mentioned seat caster linkage locking and unlocking device.

[0035] The seat caster linkage locking and unlocking device provided by this utility model includes:

[0036] The drive shaft 3 is used to connect the front and rear casters 20 on the same side of the seat. The caster drive shaft 1 of the caster 20 is connected to the end of the drive shaft 3 through a universal joint 2.

[0037] The transmission mechanism is located between the operating transmission shafts 3 on both sides of the seat and is used to control the synchronous rotation of the two operating transmission shafts 3.

[0038] The locking pedal 4 and unlocking pedal 5 are located on the side of the seat. One of them is mounted on the operating drive shaft 3, and the other is connected to the operating drive shaft 3 through the reversing drive mechanism 6 so as to drive the operating drive shaft 3 to rotate in both directions.

[0039] Please refer to Figure 2 Seat casters 20 are provided at the four corners of the bottom of the seat body 10. The seat casters 20 on the left and right sides along the length of the seat are connected by an operating drive shaft 3. The operating drive shaft 3 is used to connect the seat casters 20 at the front and rear ends on the same side of the seat. The operating drive shaft 3 is connected to the caster drive shaft 1 of the seat caster 20 through a universal joint 2.

[0040] When the operating drive shaft 3 rotates in the forward direction, it drives the universal joint 2 and the caster drive shaft 1 to rotate, causing the caster drive shaft 1 to lock the seat caster 20 and keep it locked. When the operating drive shaft 3 rotates in the reverse direction, it drives the universal joint 2 and the caster drive shaft 1 to rotate in the reverse direction, causing the caster drive shaft 1 to unlock the corresponding seat caster 20.

[0041] To facilitate the assembly and maintenance of the transmission mechanism, the operating drive shaft 3 is usually set parallel to the length direction of the seat, and the length direction of the seat is approximately parallel to the normal direction of the seat back. The seat casters 20 are set at an angle to the operating drive shaft 3. Preferably, the universal joint 2 is provided, including multiple universal joints, so as to allow for the angled connection between the caster drive shaft 1 and the operating drive shaft 3.

[0042] In order to drive the operation drive shaft 3 on the other side to rotate, a transmission mechanism is provided between the operation drive shafts 3 on both sides of the seat to control the two operation drive shafts 3 to rotate synchronously; the transmission mechanism can be specifically set as a sprocket mechanism, a timing belt mechanism, etc.

[0043] Due to limitations in the number of operating drive shafts 3 and installation space, locking pedal 4 and unlocking pedal 5 can be provided as a single set or as two sets. When locking pedal 4 and unlocking pedal 5 are provided as a single set, they can be installed on the same side of the operating drive shaft 3, such as... Figure 1 As shown, they can also be installed on the operating drive shafts 3 on both sides respectively;

[0044] When there are two sets of locking pedal 4 and unlocking pedal 5, a set of locking pedal 4 and unlocking pedal 5 are respectively set on the operating transmission shaft 3 on the left and right sides of the seat, so as to make redundancy and avoid the linkage locking and unlocking device from failing if the locking pedal 4 or unlocking pedal 5 on one side fails.

[0045] Considering that both the locking pedal 4 and the unlocking pedal 5 are operated by stepping down, in order to achieve bidirectional rotation of the operating drive shaft 3, one of the locking pedal 4 and the unlocking pedal 5 is directly sleeved on the operating drive shaft 3 so as to drive the operating drive shaft 3 to rotate synchronously, and the other is connected to the operating drive shaft 3 through the reversing transmission mechanism 6 so as to drive the operating drive shaft 3 to rotate synchronously in the opposite direction. The reversing transmission mechanism 6 can be specifically set as a reversing gear transmission mechanism, a reversing sprocket transmission mechanism, etc.

[0046] The specific shapes of the locking pedal 4 and the unlocking pedal 5 are not limited, as long as they have pedals that can be stepped on and connecting parts for connecting to the operating drive shaft 3 or the reversing gear mechanism. Their specific structure, shape and size are not limited.

[0047] Preferably, both the locking pedal 4 and the unlocking pedal 5 can be configured to include a pedal, a connecting rod, and a mounting sleeve. One end of the connecting rod is perpendicular to the pedal, and the other end of the connecting rod is provided with a mounting sleeve for connecting to the operating drive shaft 3 or the reversing drive shaft 61 of the reversing drive mechanism 6. The configuration of the connecting rod helps to extend the power arm of the pedaling action, so that the user can operate the linkage locking and unlocking device with less pressure, which is more labor-saving and better meets the usage needs of the rehabilitation training chair.

[0048] In use, the locking pedal 4 and the unlocking pedal 5 can directly drive the operating drive shaft 3 to rotate in the forward direction, or drive the operating drive shaft 3 to rotate in the reverse direction through the reversing transmission mechanism 6, thereby causing the seat casters 20 at the front and rear ends on the same side of the seat to lock or unlock simultaneously. At the same time, the operating drive shaft 3 can drive the operating drive shaft 3 on the other side to rotate synchronously through the transmission mechanism, thereby causing the seat casters 20 at the front and rear ends on the other side of the seat to lock or unlock simultaneously.

[0049] In this embodiment, the seat caster linkage locking and unlocking device can lock or unlock all seat casters 20 simultaneously with a single step operation, making it easy to operate. At the same time, the locking pedal 4 and unlocking pedal 5 are located on the side of the seat, leaving enough space for retracting and extending the feet in front of the seat, resulting in high comfort.

[0050] For preferred options, please refer to [the following]. Figure 3 The operating drive shafts 3 on both sides of the seat can be equipped with locking pedals 4 and unlocking pedals 5, which are evenly distributed about a vertically symmetrical plane perpendicular to the length of the seat. The dual pedals on both sides of the seat not only meet the redundancy requirements but also reduce the impact of the locking pedals 4 and unlocking pedals 5 on the seat's center of gravity, ensuring normal forward, backward, left, and right movement of the seat.

[0051] Based on the above embodiments, the connection structure of the caster drive shaft 1 is defined. One end of the caster drive shaft 1 is provided with a mating part for engaging with the operating hole of the seat caster 20, and the other end of the caster drive shaft 1 is connected to the universal joint 2.

[0052] Please refer to Figure 1 The caster drive shaft 1 is rotatably mounted on the mounting base plate 30 at the bottom of the seat via bearing seats 8. The number and distribution of bearing seats 8 are related to the axial length of the caster drive shaft 1.

[0053] When the axial length of the caster drive shaft 1 is relatively short, the bearing seat 8 is located at one end of the caster drive shaft 1 that is relatively close to the universal joint 2, so as to cooperate with the seat caster 20 at the other end of the caster drive shaft 1 in the axial direction and form effective support for the caster drive shaft 1.

[0054] When the axial length of the caster drive shaft 1 is long, additional bearing seats 8 need to be added between the two ends of the caster drive shaft 1.

[0055] The caster drive shaft 1 is connected to the seat caster 20 through a mating part to lock and unlock the seat caster 20. The structure, shape and size of the mating part of the caster drive shaft 1 are matched with the structure, shape and size of the seat caster 20. Typically, the seat caster 20 is provided with an internal hexagonal operating hole, and the caster drive shaft 1 is provided with a hexagonal shaft that mates with the internal hexagonal operating hole.

[0056] Based on the above embodiments, the structure of the reversing transmission mechanism 6 is further defined. Please refer to [reference needed]. Figure 2 The reversing transmission mechanism 6 includes a reversing transmission shaft 61, a driving reversing gear 62, and a driven reversing gear 63. The reversing transmission shaft 61 is arranged parallel to the outside of the operating transmission shaft 3. The driving reversing gear 62 is sleeved on the outside of the reversing transmission shaft 61, and the driven reversing gear 63 is sleeved on the outside of the operating transmission shaft 3. The driving reversing gear 62 and the driven reversing gear 63 are meshed and connected.

[0057] When the locking pedal 4 or unlocking pedal 5 connected to the reversing transmission mechanism 6 is pressed down, it drives the reversing transmission shaft 61 to rotate, which in turn drives the active reversing gear 62 mounted on the reversing transmission shaft 61 to rotate. The active reversing gear 62 drives the passive reversing gear 63 meshing with it and the operating transmission shaft 3 to rotate.

[0058] In this embodiment, a gear mechanism is used as the reversing transmission mechanism 6, which has high transmission accuracy, simple structure and small size, which is conducive to reducing the overall size of the linkage locking and unlocking device.

[0059] Based on the above embodiments, the structure of the transmission mechanism is defined. The transmission mechanism includes a transmission chain 72 and sprockets 71. The two sprockets 71 are respectively sleeved on the two operating transmission shafts 3, and the transmission chain 72 is engaged and sleeved on the two sprockets 71.

[0060] In use, the user outputs torque to the operating drive shaft 3 on one side by locking the pedal 4 or unlocking the pedal 5. The operating drive shaft 3 drives the sprocket 71 sleeved on it to rotate, and drives the sprocket 71 sleeved on the other operating drive shaft 3 to rotate through the transmission chain 72, thereby driving the other operating drive shaft 3 to rotate. The other operating drive shaft 3 controls the seat casters 20 at both ends to lock or unlock synchronously.

[0061] Compared to friction transmission mechanisms such as synchronous belt mechanisms, sprocket transmission mechanisms have high transmission accuracy and no slippage. Moreover, compared to gear transmission mechanisms, they are more compact and smaller in size, which is conducive to the miniaturization of linkage locking and unlocking devices. This, in turn, helps to reduce the weight of rehabilitation training chairs and improve the chair's mobility and control performance.

[0062] In a specific embodiment, the locking pedal 4 is keyed to the operating transmission shaft 3, and the unlocking pedal 5 is connected to the operating transmission shaft 3 via the reversing transmission mechanism 6.

[0063] When the locking pedal 4 is pressed down, the locking pedal 4 drives the operating transmission shaft 3 to rotate, and the operating transmission shaft 3 drives the unlocking pedal 5 to reset through the reversing transmission mechanism 6.

[0064] When the unlock pedal 5 is pressed down, the unlock pedal 5 drives the operating transmission shaft 3 to rotate through the reversing transmission mechanism 6, and the operating transmission shaft 3 drives the locking pedal 4 to reset.

[0065] Of course, the connection between the locking pedal 4 and the operating drive shaft 3, and between the unlocking pedal 5 and the reversing drive shaft 61, can be either a key connection or a common connection method such as a pin connection or a screw connection, as long as synchronous rotation can be guaranteed.

[0066] In addition to the aforementioned seat caster linkage locking and unlocking device, this utility model also provides a rehabilitation training chair that includes the seat caster linkage locking and unlocking device disclosed in the above embodiments. Please refer to [link / reference]. Figure 4 The rehabilitation training chair includes a chair body 10, and a plurality of chair casters 20 are provided at the bottom of the chair body 10. The chair casters 20 are connected by the chair caster linkage locking and unlocking device disclosed in the above embodiment. For the structure of other parts of the rehabilitation training chair, please refer to the prior art, which will not be described in detail here.

[0067] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0068] The rehabilitation training chair and its caster linkage locking and unlocking device provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A seat caster linkage locking and unlocking device, characterized in that, include: The operating drive shaft (3) is used to connect the seat casters (20) at the front and rear ends on the same side of the seat. The caster drive shaft (1) of the seat caster (20) is connected to the end of the operating drive shaft (3) through a universal joint (2). The transmission mechanism is located between the operating transmission shafts (3) on both sides of the seat and is used to control the synchronous rotation of the two operating transmission shafts (3); A locking pedal (4) and an unlocking pedal (5) are provided on the side of the seat. One of them is mounted on the operating drive shaft (3), and the other is connected to the operating drive shaft (3) through a reversing drive mechanism (6) so as to drive the operating drive shaft (3) to rotate in both directions.

2. The seat caster linkage locking and unlocking device according to claim 1, characterized in that, One end of the caster drive shaft (1) is provided with a mating part for engaging with the operating hole of the seat caster (20), and the other end of the caster drive shaft (1) is connected to the universal joint (2).

3. The seat caster linkage locking and unlocking device according to claim 1, characterized in that, The reversing transmission mechanism (6) includes a reversing transmission shaft (61), a driving reversing gear (62), and a passive reversing gear (63). The reversing transmission shaft (61) is arranged parallel to the outside of the operating transmission shaft (3). The driving reversing gear (62) is sleeved on the outside of the reversing transmission shaft (61), and the passive reversing gear (63) is sleeved on the outside of the operating transmission shaft (3). The driving reversing gear (62) and the passive reversing gear (63) are meshed and connected.

4. The seat caster linkage locking and unlocking device according to claim 1, characterized in that, The transmission mechanism includes a transmission chain (72) and sprockets (71). The two sprockets (71) are respectively sleeved on the two operating transmission shafts (3), and the transmission chain (72) is engaged and sleeved on the two sprockets (71).

5. The seat caster linkage locking and unlocking device according to any one of claims 1-4, characterized in that, The locking pedal (4) and the unlocking pedal (5) are mounted on the operating drive shaft (3) on the same side.

6. The seat caster linkage locking and unlocking device according to claim 5, characterized in that, The operating transmission shafts (3) on both sides of the seat are equipped with locking pedals (4) and unlocking pedals (5), and the locking pedals (4) and unlocking pedals (5) are evenly arranged about a vertical symmetrical plane perpendicular to the length direction of the seat.

7. The seat caster linkage locking and unlocking device according to any one of claims 1-4, characterized in that, The operating drive shaft (3) is arranged parallel to the length direction of the seat, the seat caster (20) is arranged at an angle to the operating drive shaft (3), and the universal joint (2) includes multiple universal joints so that the caster drive shaft (1) and the operating drive shaft (3) can be connected at an angle.

8. The seat caster linkage locking and unlocking device according to any one of claims 1-4, characterized in that, The locking pedal (4) is keyed to the operating transmission shaft (3), and the unlocking pedal (5) is connected to the operating transmission shaft (3) through the reversing transmission mechanism (6). When the locking pedal (4) is pressed down, the locking pedal (4) drives the operating transmission shaft (3) to rotate, and the operating transmission shaft (3) drives the unlocking pedal (5) to reset through the reversing transmission mechanism (6); When the unlocking pedal (5) is pressed down, the unlocking pedal (5) drives the operating transmission shaft (3) to rotate in the opposite direction through the reversing transmission mechanism (6), and the operating transmission shaft (3) drives the locking pedal (4) to reset.

9. The seat caster linkage locking and unlocking device according to any one of claims 1-4, characterized in that, Both the locking pedal (4) and the unlocking pedal (5) include a pedal, a connecting rod and a mounting sleeve. One end of the connecting rod is perpendicular to the pedal, and the other end of the connecting rod is provided with a mounting sleeve for connecting to the operating transmission shaft (3) or the reversing transmission shaft (61) of the reversing transmission mechanism (6).

10. A rehabilitation training chair, characterized in that, The device includes a seat body (10), and the bottom of the seat body (10) is provided with a plurality of seat casters (20), which are connected by a seat caster linkage locking and unlocking device according to any one of claims 1-9.

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