Upper limb internal and external rotation training rehabilitation device and upper limb rehabilitation training system

Abstract

The utility model discloses an upper limb internal and external rotation training rehabilitation device and an upper limb rehabilitation training system.The upper limb internal and external rotation training rehabilitation device comprises a mounting base, a rotation switching piece, an arm supporting device and a spring indexing pin, and the mounting base is provided with a first locking hole and a limiting sliding groove; the rotating switching part is rotationally arranged on the side, close to the limiting sliding groove, of the mounting base through the bearing part so that the rotating switching part can rotate around the mounting base, the damping reset assembly is arranged on the side, away from the mounting base, of the rotating switching part, and the arm supporting device is used for fixing the forearm of a patient; according to the rehabilitation training device, switching of three state modes can be achieved, a patient can select a rehabilitation training mode suitable for the patient according to the requirement of the patient, the difference between human body upper limb movement and rehabilitation training equipment movement is effectively reduced, limb movement compensation is effectively reduced, and the rehabilitation training efficiency is improved. And a guarantee is provided for comprehensive, safe and effective rehabilitation training of the patient.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, and further relates to an upper limb internal and external rotation training rehabilitation device and an upper limb rehabilitation training system. Background Art

[0002] The main causes of upper limb dysfunction include cerebral palsy, traffic accidents, and work-related injuries, with spinal cord injury and cerebrovascular disease, particularly stroke, accounting for the majority of cases. According to statistics, 85% of stroke survivors experience upper limb dysfunction, and this number is increasing. In addition to surgical and medication treatments, rehabilitation programs developed by rehabilitation therapists can fundamentally improve upper limb dysfunction and gradually restore patients to a healthy state.

[0003] Rehabilitation training equipment can effectively help patients complete rehabilitation training, thereby improving their recovery and quality of life, helping them return to their families and lives as soon as possible. This rehabilitation training equipment has important clinical significance and social value for the large number of stroke patients.

[0004] However, existing upper limb rehabilitation training equipment in China has a single training model and a simple and indirect human-machine interface. This can lead to limb compensation during training due to the difference between the human upper limb movement and the movement of the rehabilitation training equipment, significantly reducing the training effect. In severe cases, it can even cause secondary damage to the body, thereby aggravating the patient's upper limb dysfunction. Therefore, we propose an upper limb internal and external rotation training rehabilitation device. Utility Model Content

[0005] In response to the above technical problems, the purpose of the present invention is to provide an upper limb internal and external rotation training rehabilitation device, which adapts to the differences between human upper limb movements and rehabilitation training equipment movements, reduces limb movement compensation, and allows patients to conduct comprehensive, safe and effective rehabilitation training, thereby solving the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention provides an upper limb internal and external rotation training and rehabilitation device, comprising:

[0007] A mounting base, wherein the mounting base is provided with a first locking hole and a limited sliding groove;

[0008] A rotation switching member, the rotation switching member being rotatably disposed on a side of the mounting base close to the limiting sliding groove via a bearing member, so that the rotation switching member can rotate around the mounting base;

[0009] an arm support device, which is arranged on a side of the rotating switching member away from the mounting base through a damping reset component, and is used to fix the patient's forearm;

[0010] A spring indexing pin, the spring indexing pin being arranged through the rotation switching member;

[0011] The spring indexing pin can be correspondingly inserted into the first locking hole in the locked state, so that the rotation switching member and the mounting base are in a relatively locked state;

[0012] The spring indexing pin is correspondingly inserted into the limiting sliding groove when in the limiting state, so that the rotation switching member can rotate at a small angle relative to the mounting base;

[0013] The spring indexing pin is correspondingly separated from the mounting base when in a free state, so that the rotation switching member can rotate at a full angle relative to the mounting base.

[0014] By setting the coordination of the spring indexing pin and the mounting base, the switching of three state modes can be realized, so that patients can choose the rehabilitation training mode that suits them according to their own needs, thereby effectively reducing the difference between the upper limb movement of the human body and the movement of the rehabilitation training equipment, effectively reducing limb movement compensation, and providing a guarantee for patients to carry out comprehensive, safe and effective rehabilitation training.

[0015] In some embodiments, a support member is provided on the rotation switching member;

[0016] The damping reset assembly includes a damping member and a limiting seesaw, one end of the limiting seesaw is connected to the support member through the damping member, and the arm support device is provided on the end of the limiting seesaw away from the rotation switching member;

[0017] One end of the damping member is connected to a side of the support member away from the center of the bearing member, and the other end of the damping member is connected to a side of the limiting rocker away from the arm support device.

[0018] By setting up the damping part, the situation where the limit rocker cannot support the patient's forearm when it descends is effectively avoided. At the same time, the discomfort caused to the patient by the rigid connection between the limit rocker and the support part is avoided. At the same time, the damage to the equipment caused by the brute force generated during use is reduced, and the stability and reliability of the device are effectively improved.

[0019] In some embodiments, the limiting rocker is provided with a connecting section extending toward the center of the bearing member;

[0020] The damping reset assembly further includes a rebound element, one end of which is connected to the connecting section, and the other end of which is connected to the rotation switching member.

[0021] By providing a rebound element, the arm support device can be reset faster and more stably. In addition, the loss of the damping component is effectively alleviated, thereby extending the service life of the entire device.

[0022] In some embodiments, a limiting groove is provided on the support member, and a limiting pin is provided on the connecting section. The limiting pin is correspondingly inserted into the limiting groove and can slide along the limiting groove.

[0023] By setting a combination of limit slots and limit pins, the range of movement of the connecting section during use is further limited, thereby effectively limiting the range of movement of the arm support device in the vertical space, thereby effectively improving the patient's comfort and further strengthening the device's restraint on the patient to achieve better rehabilitation training effects.

[0024] In some embodiments, the support member is disposed on an edge of the rotation switching member away from the center of the bearing member.

[0025] In some embodiments, the first locking hole is opened in the limiting sliding groove;

[0026] A threaded hole is provided on the rotation switching member, and an external thread corresponding to the threaded hole is provided on the spring indexing pin, so that the spring indexing pin can be threadedly connected to the rotation switching member.

[0027] In some embodiments, the arm support device includes a soft arm support and a binding piece. The soft arm support is provided with a placement groove adapted to the human forearm, and the binding piece is correspondingly arranged on both sides of the placement groove to fix and bind the forearm placed in the placement groove.

[0028] In some embodiments, the limiting rocker is elastic.

[0029] According to another aspect of the present invention, the present invention further provides an upper limb rehabilitation training system, comprising a computer system, and further comprising:

[0030] A work platform is provided with the upper limb internal and external rotation training and rehabilitation device described in any of the above embodiments, and the upper limb internal and external rotation training and rehabilitation device is connected to the computer system.

[0031] According to another aspect of the present invention, the upper limb rehabilitation training system further provided by the present invention further includes:

[0032] A height adjustment member is tiltedly arranged on the working platform, and a sliding groove is provided on the height adjustment member, and the mounting base is slidably arranged in the sliding groove, so that the mounting base can be adjusted in height by sliding along the sliding groove.

[0033] Compared with the prior art, the upper limb internal and external rotation training and rehabilitation device provided by the present invention has the following beneficial effects:

[0034] 1. The upper limb internal and external rotation training and rehabilitation device provided by the present invention realizes the switching of three states by setting the cooperation of the spring indexing pin and the mounting base, so that patients can choose the rehabilitation training mode that suits them according to their own needs, thereby effectively reducing the difference between the upper limb movement of the human body and the movement of the rehabilitation training equipment, effectively reducing limb movement compensation, and providing a guarantee for patients to carry out comprehensive, safe and effective rehabilitation training, with better reliability and practicality.

[0035] 2. The upper limb internal and external rotation training and rehabilitation device provided by the present invention, by providing a rebound element, enables the arm support device to be reset faster and more stably. It also effectively alleviates the loss of the damping component, thereby extending the service life of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The preferred implementation scheme will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0037] Figure 1 This is a schematic diagram of the three-dimensional structure of the upper limb internal and external rotation training and rehabilitation device according to the preferred embodiment of the present invention;

[0038] Figure 2 It is a side cross-sectional structural diagram of an upper limb internal and external rotation training and rehabilitation device according to a preferred embodiment of the present invention;

[0039] Figure 3 It is a structural diagram of an upper limb rehabilitation training system according to a preferred embodiment of the present utility model.

[0040] Description of Figure Numbers:

[0041] Mounting base 10, support member 11, rotating switching member 20, spring indexing pin 30, damping reset assembly 40, limiting rocker 41, damping member 42, rebound element 43, arm support device 50, soft arm support member 51, binding member 52, bearing member 60, computer system 70, working platform 80, height adjustment member 90, sliding slot 91. DETAILED DESCRIPTION

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0043] To simplify the drawings, only the parts relevant to the utility model are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0044] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0045] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0046] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0047] In one embodiment, the reference Figure 1 and Figure 2 The present invention provides an upper limb internal and external rotation training and rehabilitation device, comprising a mounting base 10, a rotation switching member 20, an arm support device 50 and a spring indexing pin 30, wherein the mounting base 10 is provided with a first locking hole, and the mounting base 10 is provided with a limited sliding groove, the rotation switching member 20 is rotatably arranged on the mounting base 10 on a side close to the limited sliding groove through a bearing member 60, so that the rotation switching member 20 can rotate around the mounting base 10, and the damping reset component 40 is arranged on the side of the rotation switching member 20 away from the mounting base 10, and the arm support device 50 is used to fix the patient's forearm;

[0048] The spring indexing pin 30 is provided through the rotation switching member 20. When in the locked state, the spring indexing pin 30 can be correspondingly inserted into the first locking hole, so that the rotation switching member 20 and the mounting base 10 are in a relatively locked state;

[0049] The spring indexing pin 30 is inserted into the limiting sliding groove when in the limiting state, so that the rotation switching member 20 can rotate at a small angle relative to the mounting base 10;

[0050] The spring indexing pin 30 is correspondingly separated from the mounting base 10 in a free state, so that the rotation switching member 20 can rotate at a full angle relative to the mounting base 10 .

[0051] Specifically, the mounting base 10 is a disc-shaped base, the rotating switching member 20 is a disc with the same contour as the mounting base 10, the bearing member 60 is arranged between the rotating switching member 20 and the mounting base 10, and the centers of the mounting base 10, the rotating switching member 20, and the arm support device 50 overlap, so that when the rotating switching member 20 rotates on the mounting base 10, the rotating switching member 20 always remains on the mounting base 10, and the first locking hole can be opened on the edge away from the center of the mounting base 10, and the limiting sliding groove is also opened on the side of the mounting base 10 facing the rotating switching member 20, and the distance from the limiting sliding groove to the center of the mounting base 10 is the same as the distance from the first locking hole to the mounting base 10. The distance between the centers is consistent. In addition, the spring indexing pin 30 is set through the rotating switching member 20. The distance from the spring indexing pin 30 to the center of the mounting base 10 is consistent with the distance from the first locking hole to the center of the mounting base 10, so that the spring indexing pin 30 can be inserted into the first locking hole and slide into the limiting sliding groove, thereby realizing that the upper limb internal and external rotation training and rehabilitation device provided by this application can switch the state mode. In addition, the arm support device 50 is set on the rotating switching member 20 through the damping reset component 40, so that the arm support device 50 can rotate with the mounting base 10 as the center under the drive of the rotating switching member 20, and the arm support device 50 extends in the direction away from the center of the mounting base 10 to facilitate the patient's use.

[0052] The spring indexing pin 30 generally includes a body, a pin and a spring member. The spring member is sleeved on the pin, and the body is sleeved outside the pin and the spring member. A handle portion is provided at one end of the pin, and a limit portion is provided at the other end. The limit portion and the handle portion extend out of the two ends of the body respectively. Usually, under normal circumstances, the spring member is in a compressed state, so that under the elastic force of the spring member, the entire pin moves relative to the body toward the limit portion. When the handle portion is pulled and rotated 90 degrees, the pin is stuck in a slot in the body, so that the length of the limit portion extending out becomes shorter, thereby achieving a normal state. When the spring indexing pin 30 is lowered, the pin on the spring indexing pin 30 is correspondingly inserted into the first locking hole, thereby preventing the rotating switching member 20 from rotating relative to the mounting base 10. When the handle portion of the spring indexing pin 30 is rotated, the length of the limit portion on the pin is shortened, thereby causing the pin to disengage from the first locking hole, but correspondingly stuck in the range of the limit sliding groove, thereby allowing the rotating switching member 20 to rotate at a certain small angle within the range of the limit sliding groove. Finally, the rotating switching member 20 can be completely removed to achieve a full 360° rotation relative to the mounting base 10.

[0053] The upper limb internal and external rotation training rehabilitation device provided in this application can have three modes for patients to choose from, namely locking mode, limiting mode and free mode. Specifically, when the device is in locking mode, the arm support device 50 maintains a fixed angle with the mounting base 10 and cannot rotate relative to each other. This mode is suitable for rehabilitation training of a small range of specific postures; when the device is in limiting mode, the arm support device 50 can rotate a certain angle relative to the mounting base 10. This mode is suitable for rehabilitation training of a large range of adaptive postures; when the device is in free mode, the arm support device 50 can rotate freely relative to the mounting base 10. This mode is suitable for rehabilitation training of patients' freedom and switching of left and right hands.

[0054] In one embodiment, the reference Figure 1 and Figure 2 A support member 11 is provided on the rotating switching member 20; the damping reset assembly 40 includes a damping member 42 and a limiting rocker 41, one end of the limiting rocker 41 is connected to the support member 11 through the damping member 42, and an arm support device 50 is provided on the end of the limiting rocker 41 away from the rotating switching member 20; one end of the damping member 42 is connected to a side of the support member 11 away from the center of the bearing member 60, and the other end of the damping member 42 is connected to a side of the limiting rocker 41 away from the arm support device 50.

[0055] Specifically, the support member 11 can be a support plate extending outward from the surface of the rotation switching member 20, and the support plate is arranged perpendicular to the rotation switching member 20. The damping member 42 includes a fixed portion and a damping connection portion, and the fixed portion and the damping connection portion are correspondingly connected. Usually, the angle between the two is not less than 90°. The fixed portion is correspondingly fixed on the support member 11, and the damping connection portion is correspondingly fixed on the bottom of the limiting rocker 41. When the patient fixes his forearm on the arm support device 50, under the action of the forearm's own weight, the limiting rocker 41 will sink downward. Under the action of the damping member 42, the situation where the limiting rocker 41 descends and cannot support the patient's forearm is avoided. At the same time, the rigid connection between the limiting rocker 41 and the support member 11 is avoided to cause discomfort to the patient, and at the same time, the brute force generated during use is reduced to reduce the damage to the equipment, thereby effectively improving the stability and reliability of the device.

[0056] In one embodiment, the reference Figure 1 and Figure 2 On the basis of the above embodiment, the limiting rocker 41 is provided with a connecting section extending toward the center of the bearing member 60; the damping reset assembly 40 also includes a rebound element 43, one end of the rebound element 43 is connected to the connecting section, and the other end of the rebound element 43 is connected to the rotation switching member 20.

[0057] Specifically, by adding a rebound element 43 between the limit rocker 41 and the rotation switching member 20, the smoothness and efficiency of the reset of the limit rocker 41 are further enhanced, while the loss of the damping member 42 is also alleviated, thereby extending the service life of the entire device.

[0058] It should be noted that the rebound element 43 may be a coil spring, a rubber spring, or other elastic materials, depending on the actual situation and is not limited here.

[0059] In one embodiment, a limiting groove is provided on the support member 11 , and a limiting pin is provided on the connecting section. The limiting pin is correspondingly inserted into the limiting groove and can slide along the limiting groove.

[0060] Specifically, the limit groove extends in an arc shape along the vertical direction and is adapted to the movement trajectory of the connecting section. At the same time, the limit pin is inserted into the limit groove accordingly to further limit the range of movement of the connecting section during use, thereby effectively limiting the range of movement of the arm support device 50 in the vertical space, thereby effectively improving the patient's comfort, and further strengthening the device's restraint force on the patient to achieve better rehabilitation training effects.

[0061] In one embodiment, the reference Figure 1 and Figure 2 The support member 11 is arranged on an edge of the rotation switching member 20 away from the center of the bearing member 60.

[0062] Specifically, by arranging the support member 11 on the edge of the rotating switching member 20 away from the center of the bearing member 60, it is convenient for the patient to wear it, and at the same time the rotation range of the arm support device 50 is effectively expanded, thereby making the patient's rehabilitation training range larger, thereby providing a guarantee for the patient's rehabilitation training effect.

[0063] In one embodiment, the first locking hole is opened in the limiting sliding groove;

[0064] A threaded hole is provided on the rotation switching member 20 , and an external thread corresponding to the threaded hole is provided on the spring indexing pin 30 , so that the spring indexing pin 30 can be threadedly connected to the rotation switching member 20 .

[0065] Specifically, the first locking hole is opened in the limiting sliding groove, so that the upper limb internal and external rotation training and rehabilitation device can switch from the locking mode to the limiting mode more quickly, effectively improving the operating convenience of the device. In addition, by setting a spring indexing pin 30 threadedly connected to the rotating switching member 20, the free mode can be achieved by turning the spring indexing pin 30 out of the threaded hole.

[0066] In one embodiment, the reference Figure 2 On the basis of the above embodiment, the arm support device 50 includes a soft arm support 51 and a binding part 52. The soft arm support 51 is provided with a placement groove adapted to the human forearm, and the binding part 52 is correspondingly arranged on both sides of the placement groove to fix and bind the forearm placed in the placement groove.

[0067] Specifically, the soft arm support 51 is provided with a placement groove adapted to the human forearm so that the patient can place the forearm more comfortably, thereby obtaining the best comfort and support effect, and effectively improving the patient's usage experience.

[0068] In one embodiment, the limiting rocker plate 41 is elastic.

[0069] Specifically, the limit rocker 41 can be a spring alloy with excellent elastic recovery. By setting the limit rocker 41 to be elastic, the elastic connection between the arm support device 50 and the rotating switching member 20 can be further strengthened, thereby further optimizing the comfort during use, and effectively alleviating the pressure on the damping member 42 and the rebound element 43, thereby further extending the service life of the device.

[0070] The utility model further provides an upper limb rehabilitation training system, Figure 3 , including not only a computer system 70, but also a work platform 80, on which the upper limb internal and external rotation training and rehabilitation device described in any of the above embodiments is provided, and the upper limb internal and external rotation training and rehabilitation device is connected to the computer system 70.

[0071] Specifically, the steel box girder lifting and construction device with the upper limb internal and external rotation training and rehabilitation device described in any of the above embodiments realizes the switching of three states, thereby enabling patients to choose a rehabilitation training mode that suits them according to their own needs, thereby effectively reducing the difference between the upper limb movement of the human body and the movement of the rehabilitation training equipment, effectively reducing limb movement compensation, and providing a guarantee for patients to carry out comprehensive, safe and effective rehabilitation training, enabling patients to obtain better rehabilitation effects, and having better reliability and practicality.

[0072] In one embodiment, the reference Figure 3 The upper limb rehabilitation training system further provided by the present invention also includes a height adjustment member 90, which is tiltedly arranged on the working platform 80, and a sliding groove 91 is provided on the height adjustment member 90, and the mounting base 10 is slidably arranged in the sliding groove 91, so that the mounting base 10 can be adjusted in height by sliding along the sliding groove 91.

[0073] Specifically, the height adjustment member 90 is tiltedly arranged on the working platform 80 so that the patient can adjust the height and distance from the arm support device 50 to his or her torso on the upper limb internal and external rotation training rehabilitation device according to his or her own height and arm length, so that the patient can be more comfortable during use, effectively expanding the scope of application of the upper limb rehabilitation training system, and thus effectively enhancing the practicality of the upper limb rehabilitation training system.

[0074] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An upper limb internal and external rotation training and rehabilitation device, characterized in that: include: A mounting base, wherein the mounting base is provided with a first locking hole and a limited sliding groove; A rotation switching member, the rotation switching member being rotatably disposed on a side of the mounting base close to the limiting sliding groove via a bearing member, so that the rotation switching member can rotate around the mounting base; an arm support device, which is arranged on a side of the rotating switching member away from the mounting base through a damping reset component, and is used to fix the patient's forearm; A spring indexing pin, the spring indexing pin being arranged through the rotation switching member; The spring indexing pin can be correspondingly inserted into the first locking hole in the locked state, so that the rotation switching member and the mounting base are in a relatively locked state; The spring indexing pin is correspondingly inserted into the limiting sliding groove when in the limiting state, so that the rotation switching member can rotate at a small angle relative to the mounting base; The spring indexing pin is correspondingly separated from the mounting base when in a free state, so that the rotation switching member can rotate at a full angle relative to the mounting base.

2. The upper limb internal and external rotation training and rehabilitation device according to claim 1, characterized in that: A support member is provided on the rotation switching member; The damping reset assembly includes a damping member and a limiting seesaw, one end of the limiting seesaw is connected to the support member through the damping member, and the arm support device is provided on the end of the limiting seesaw away from the rotation switching member; One end of the damping member is connected to a side of the support member away from the center of the bearing member, and the other end of the damping member is connected to a side of the limiting rocker away from the arm support device.

3. The upper limb internal and external rotation training and rehabilitation device according to claim 2, characterized in that: The limiting rocker is provided with a connecting section extending toward the center of the bearing member; The damping reset assembly further includes a rebound element, one end of which is connected to the connecting section, and the other end of which is connected to the rotation switching member.

4. The upper limb internal and external rotation training and rehabilitation device according to claim 3, characterized in that: A limiting groove is provided on the support member, and a limiting pin is provided on the connecting section. The limiting pin is correspondingly inserted into the limiting groove and can slide along the limiting groove.

5. The upper limb internal and external rotation training and rehabilitation device according to claim 4, characterized in that: The support member is arranged on an edge of the rotation switching member away from the center of the bearing member.

6. The upper limb internal and external rotation training and rehabilitation device according to any one of claims 2 to 5, characterized in that: The first locking hole is provided in the limiting sliding groove; A threaded hole is provided on the rotation switching member, and an external thread corresponding to the threaded hole is provided on the spring indexing pin, so that the spring indexing pin can be threadedly connected to the rotation switching member.

7. The upper limb internal and external rotation training and rehabilitation device according to claim 6, characterized in that: The arm support device includes a soft arm support and a binding piece. The soft arm support is provided with a placement groove adapted to the human forearm. The binding piece is correspondingly arranged on both sides of the placement groove to fix and bind the forearm placed in the placement groove.

8. The upper limb internal and external rotation training and rehabilitation device according to claim 6, characterized in that: The limiting rocker is elastic.

9. An upper limb rehabilitation training system, comprising a computer system, characterized in that: Also includes: A work platform is provided on which the upper limb internal and external rotation training and rehabilitation device according to any one of claims 1 to 8 is provided, and the upper limb internal and external rotation training and rehabilitation device is connected to the computer system.

10. The upper limb rehabilitation training system according to claim 9, characterized in that: Also includes: A height adjustment member is tiltedly arranged on the working platform, and a sliding groove is provided on the height adjustment member, and the mounting base is slidably arranged in the sliding groove, so that the mounting base can be adjusted in height by sliding along the sliding groove.

Images