Wrist joint training device

Abstract

A wrist joint training device comprises a machine frame, a lead screw driven by a motor is fixedly connected to the machine frame, a nut is arranged on the lead screw in a matched mode, an arm supporting plate is fixedly installed on the portion, above the lead screw, of the machine frame, the motor is connected to a controller, a transverse shaft is fixedly connected to the nut, and rails parallel to the lead screw are fixedly installed on the two sides of the lead screw respectively. The left side and the right side of the nut on the transverse shaft are respectively and rotationally provided with a roller matched on the track, two ends of the transverse shaft are respectively provided with a connecting rod driving mechanism, each connecting rod driving mechanism comprises a transmission rod fixedly connected to the end portion of the transverse shaft, one end of each connecting rod is hinged to the end portion of the corresponding transmission rod, and the other end of each connecting rod is hinged to a driving handle. The driving handle is fixedly connected to the rotating disc, the rotating disc is directly or indirectly connected to the rack in a rotating mode through a shaft in the horizontal left-right direction, an installation rod is fixedly connected to the rotating disc, and the grip is fixedly connected to the installation rod. The device is simple in structure.

Description

Technical Field

[0001] The utility model relates to rehabilitation training equipment, in particular to a wrist joint rehabilitation training device, belonging to the field of mechanical technology. Background Art

[0002] Rehabilitation training after wrist joint injury is a common training subject. Common training is flexion / extension training to adapt to the shape and size of grasped objects and keep the arm and hand stable at the same time. When the wrist joint cannot move well initially and cannot be trained independently, manual and equipment assistance are often required. Therefore, a variety of devices suitable for wrist joint training have been developed. There are also various devices for wrist joint training in Chinese patent documents. For example, the wrist joint trainer disclosed in CN218220556U has a relatively complex structure and high cost. Moreover, this training mechanism needs to drive the wrist part by fixing the palm during training, which is not suitable for some patients with fingers that cannot be straightened. In addition, if the motor gets out of control during training when using this device to fix the hand, it will cause harm to the patient. Chinese patent CN213157470U discloses a wrist joint training structure. Using this device for training requires the palm backboard to drive the patient's palm through the protective gear for palmar flexion and dorsiflexion rehabilitation training. When using this structure for training, the rotation axis of the wrist joint for palmar flexion and dorsiflexion and the hinge axis of the palm backboard and the wrist backboard cannot be strictly concentric, and there will be relative movement between the palm and the protective gear during training, resulting in loosening of the restraint and affecting the training effect. Summary of the Invention

[0003] The purpose of the utility model is to overcome the above problems existing in the current wrist joint training and provide a wrist joint training device.

[0004] To achieve the purpose of the utility model, the following technical scheme is adopted: A wrist joint training device includes a frame. A lead screw driven by a motor is fixedly connected to the frame. A nut is also fitted on the lead screw. An arm support plate is fixedly installed on the frame above the lead screw. The motor is connected to a controller. A cross shaft is fixedly connected to the nut. Guide rails parallel to the lead screw are respectively fixedly installed on both sides of the lead screw. Rollers fitted on the guide rails are respectively rotatably installed on the left and right sides of the nut on the cross shaft. A set of link drive mechanisms are installed at both ends of the cross shaft. The link drive mechanism includes a transmission rod fixedly connected to the end of the cross shaft. One end of the link is hinged to the end of the transmission rod and the other end is hinged to a drive handle. The drive handle is fixedly connected to a turntable. The turntable is directly or indirectly rotatably connected to the frame through a horizontally left-right axis. An installation rod is fixedly connected to the turntable. A grip is fixedly connected to the installation rod.

[0005] Furthermore, sockets are provided at both ends of the grip. The grip is slidably inserted into the installation rod through the sockets. A threaded hole is provided on the end face of the installation rod, and a locking screw is screwed into the threaded hole.

[0006] Further, a long groove in the front - rear direction is provided on the upper end surface of the arm support plate. A long hole is provided on the bottom surface of the long groove. T - shaped screws are respectively inserted through the front and rear of the horizontal axis in the long hole. After passing through the long hole, the T - shaped screws are screwed with locking nuts for locking. The nuts are located in the long groove. The lower end of the T - shaped screw is fixedly connected with a proximity switch, and a proximity body that is inductive to the proximity switch is fixedly connected to the horizontal axis.

[0007] The positive and beneficial technical effects of the present utility model are as follows: This training device is used for passive training of wrist joint flexion / extension. It has a simple and stable structure. Two sets of lever drive mechanisms apply forces from the left and right sides, with uniform force distribution. The position of the grip is adjustable, which can make the rotation axis of the wrist joint during training coaxial with the turntable, and the training effect is good. This will be described in detail in combination with the specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is the overall schematic diagram of the present utility model.

[0009] Figure 2 is the partial enlarged view of the present utility model.

[0010] Figure 3 is the schematic diagram of the proximity switch installation. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0011] To more fully explain the implementation of the present utility model, implementation examples of the present utility model are provided. These implementation examples are only for the elaboration of the present utility model and do not limit the scope of the present utility model.

[0012] The present utility model will be further explained in detail in combination with the drawings. The reference numerals in the drawings are: 1: frame; 2: motor; 3: lead screw; 4: roller; 5: transmission rod; 6: connecting rod; 7: driving handle; 8: turntable; 9: mounting rod; 10: grip; 11: locking screw; 12: arm support plate; 13: nut; 14: horizontal axis; 15: track; 16: long groove; 17: T - shaped screw; 18: proximity switch; 19: locking nut; 20: groove cover.

[0013] As shown in the accompanying drawings, a wrist joint training device includes a frame 1, a lead screw 3 driven by a motor 2 is fixedly connected to the frame, and a nut 13 is also fitted on the lead screw. An arm support plate 12 is fixedly installed on the frame above the lead screw, the motor is connected to a controller, a transverse axis 14 is fixedly connected to the nut, rails 15 parallel to the lead screw are fixedly installed on both sides of the lead screw, rollers 4 fitted on the rails are rotatably mounted on the left and right sides of the nut on the transverse axis 14, and a set of connecting rod drive mechanisms are installed at both ends of the transverse axis, the connecting rod drive mechanism includes a transmission rod 5 fixedly connected to the end of the transverse axis, one end of the connecting rod 6 is hinged to the end of the transmission rod 5, and the other end is connected to the driving handle 7, the driving handle 7 is fixedly connected to the turntable 8, and the turntable 8 is directly or indirectly rotatably connected to the frame through a horizontal left and right axis, a mounting rod 9 is fixedly connected to the turntable, and a handle 10 is fixedly connected to the mounting rod. In this embodiment, sockets are provided at both ends of the handle, and the handle is slidably inserted into the mounting rod through the sockets. A screw hole is provided on the end face of the mounting rod, and a locking screw 11 is screwed into the screw hole. The position of the handle can be adjusted by loosening the locking screw.

[0014] In this embodiment, a slot 16 extending in the front-to-back direction is defined on the upper end surface of the arm support plate. A slotted hole is defined in the bottom surface of the slot. T-shaped screws 17 are threaded through the slots, one in front of and one behind the horizontal axis. The T-shaped screws are threaded through the slots and secured with locknuts 19. Locknuts 19 are located within the slots. A proximity switch 18 is fixedly connected to the lower end of the T-shaped screws. A proximity body, which responds to the proximity switch, is fixedly connected to the horizontal axis. Adjusting the position of the proximity switch allows the horizontal axis's start and end positions to be adjusted to suit the needs of different users.

[0015] The device drives the slider to move linearly through a lead screw, which drives the connecting rod to drive the driving handle to drive the turntable 8 to rotate, thereby achieving wrist flexion / extension training.

[0016] After describing the implementation mode of the present invention in detail, people familiar with the technology can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent application. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention, and the present invention is not limited to the implementation mode of the examples given in the specification.

Claims

1. A wrist joint training device, comprising a frame, on which a motor-driven lead screw is fixedly connected, a nut is also fitted on the lead screw, an arm support plate is fixedly installed on the frame above the lead screw, and the motor is connected to a controller, and is characterized in that: A horizontal axis is fixedly connected to the nut, and rails parallel to the screw are fixedly installed on both sides of the screw. Rollers that cooperate with the rails are rotatably installed on the left and right sides of the nut on the horizontal axis. A set of connecting rod driving mechanisms are installed at both ends of the horizontal axis. The connecting rod driving mechanism includes a transmission rod fixedly connected to the end of the horizontal axis, one end of the connecting rod is hinged to the end of the transmission rod, and the other end is connected to the driving handle. The driving handle is fixedly connected to the turntable, and the turntable is directly or indirectly rotatably connected to the frame through a horizontal left and right axis. A mounting rod is fixedly connected to the turntable, and a handle is fixedly connected to the mounting rod.

2. The wrist joint training device according to claim 1, characterized in that: Insertion holes are provided at both ends of the handle, and the handle is slidably inserted on the mounting rod through the insertion holes. The end surface of the mounting rod is provided with screw holes, and locking screws are screwed into the screw holes.

3. A wrist joint training device according to claim 1, characterized in that: A long groove in the front-to-back direction is provided on the upper end surface of the arm support plate, and a long hole is provided on the bottom surface of the long groove. T-shaped screws are respectively passed through the long holes in front and behind the horizontal axis. The T-shaped screws are screwed with nuts after passing through the long holes. The nuts are located in the long grooves. The lower end of the T-shaped screw is fixedly connected to a proximity switch, and a proximity body that senses the proximity switch is fixedly connected to the horizontal axis.

Images