Burn postoperative dressing binding device

Abstract

The invention belongs to the technical field of clinical auxiliary instruments in the burn department, and discloses a burn postoperative dressing binding device which comprises a main body component, a dressing component, a supporting component and a driving component, the main body component comprises a body component, a dressing component fixedly connected to the body component, the dressing component is sleeved with the supporting component, and the driving component is in threaded connection with the supporting component; the dressing assembly is connected with the supporting assembly, the wiping component comprises a rotating assembly rotationally connected in the body assembly, a smearing assembly slidably connected outside the rotating assembly and a locking assembly arranged outside the rotating assembly, and the burn position of a patient is placed in the body assembly, and the dressing assembly is connected with the supporting assembly; and then the driving assembly is rotated to control the supporting assembly to move, in the moving process, the dressing supporting assembly can drive the dressing assembly to conduct swing spraying, so that the medicine sprayed to the burnt part is more uniform, and follow-up recovery is facilitated.

Description

Technical Field

[0001] The present invention belongs to the technical field of clinical auxiliary instruments for burn departments, and specifically relates to a dressing bandaging device for after burn surgery. Background Art

[0002] At present, after the operation on the limbs of burn patients in the hospital burn department, it is necessary to bandage the limbs of the patients with dressings. However, when bandaging the limbs of the patients with dressings now, it is usually manual dressing, which greatly increases the workload and labor intensity of medical staff, reduces the work efficiency of medical staff, is time-consuming and laborious when working, and when applying dressings to the affected parts of the patients, especially when choosing liquid dressings, the manual dressing will have the problem of uneven dressing. Summary of the Invention

[0003] To solve the problem of manual dressing in the dressing bandaging device for after burn surgery mentioned in the above background art, which greatly increases the workload and labor intensity of medical staff, reduces the work efficiency of medical staff, is time-consuming and laborious when working, and when applying liquid dressings to the affected parts of the patients, the manual dressing will have the problem of uneven dressing, the present invention provides a dressing bandaging device for after burn surgery.

[0004] To achieve the above object, the present invention provides the following technical solutions: including,

[0005] A main body component, including a body assembly, a dressing component fixedly connected to the body assembly, a support component sleeved outside the dressing component, and a driving component threadedly connected to the support component;

[0006] A wiping component, including a rotating component rotatably connected inside the body assembly, a smearing component slidably connected outside the rotating component, and a locking component arranged outside the rotating component.

[0007] Preferably, the body assembly includes a base, an electric telescopic rod fixedly connected to the base, a dressing half shell one fixedly connected to the end of the electric telescopic rod, a sliding rod fixedly connected to the dressing half shell one, and a dressing half shell two slidably connected outside the sliding rod.

[0008] Preferably, an activity opening is provided on the dressing half shell two;

[0009] The dressing component includes a material box fixedly connected to the dressing half shell two, a spraying half ring connected to the material box through a feeding pipe, and a plurality of nozzles installed on the inner wall of the spraying half ring.

[0010] Preferably, a fastening groove is provided at the end of the spraying half ring, and sliding grooves are provided on the inner walls of both the dressing half shell one and the dressing half shell two;

[0011] The support assembly includes an L-shaped support ring slidably connected in the sliding groove, a sliding groove formed on the inner wall of the L-shaped support ring, a first arc-shaped elastic member disposed in the sliding groove, a contact member slidably connected in the sliding groove, and a fastening member slidably connected in the fastening groove;

[0012] Wherein, the spraying semi-ring is slidably connected in the sliding groove.

[0013] Preferably, the contact member includes a moving semi-ring slidably connected in the sliding groove, a contact rod fixedly connected to the end of the moving semi-ring, and a fastening cavity formed on the contact rod.

[0014] Preferably, the fastening member includes a wedge block slidably connected in the fastening groove, a limiting rod fixedly connected to the end of the wedge block, a baffle fixedly connected to the end of the limiting rod, and a second elastic member sleeved outside the limiting rod between the baffle and the moving semi-ring.

[0015] Preferably, a swinging groove is formed on the inner wall of the first dressing semi-shell, and a movable groove is formed on the L-shaped support ring;

[0016] The driving assembly includes a threaded rod rotatably connected in the sliding groove, and a dial rod fixedly connected to the moving semi-ring;

[0017] Wherein, the dial rod is movably connected in the swinging groove, and the dial rod is adapted to the movable groove.

[0018] Preferably, an output groove is formed on the second dressing semi-shell, a rotating groove is formed on the inner wall of the second dressing semi-shell, and a limiting groove is formed in the rotating groove of the second dressing semi-shell;

[0019] The rotating assembly includes a rotating disk rotatably connected in the rotating groove, a guiding groove formed on the rotating disk, a guiding rod movably connected in the guiding groove, and a driving rod fixedly connected outside the rotating disk;

[0020] Wherein, the driving rod moves in the output groove.

[0021] Preferably, the smearing assembly includes an arc-shaped rod fixedly connected to the end of the guiding rod, a connecting rod fixedly connected outside the arc-shaped rod, and a plurality of smearing beads rotatably connected outside the arc-shaped rod.

[0022] Preferably, a locking groove is formed outside the driving rod, and a plurality of protrusions are fixedly connected to the inner wall of the output groove;

[0023] The locking assembly includes a locking block slidably connected in the locking groove, and a third elastic member disposed between the locking block and the inner wall of the locking groove.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: first, the patient's burn site is placed in the main body component, the dressing component is connected to the support component, and then the driving component is rotated to control the support component to move. During the movement, the dressing support component will drive the dressing component to swing and spray, so that the medicine sprayed on the burn site is more uniform, which is conducive to subsequent recovery;

[0025] Before spraying, the rotational force is converted into a sliding force by toggling the rotating component and transmitted to the application component, so that the application component can contact the patient's epidermis and is restricted by the locking component to prevent the application component from leaving the patient's epidermis. In this way, during the sliding process of the above-mentioned supporting component, the application component will be driven to follow the movement and evenly apply the excess medicine to the patient's burn position. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the internal structure of the shell of the dressing device for burn surgery of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the main body component of the dressing device for burn surgery of the present invention;

[0029] Figure 4 It is a schematic cross-sectional structure diagram of dressing half shell 1 and dressing half shell 2 in the dressing bandage device for burn surgery of the present invention;

[0030] Figure 5 It is a schematic diagram of the structure of the fastener in the dressing device for burn surgery of the present invention;

[0031] Figure 6 It is a schematic diagram of the structure of the abutment member in the dressing device for burn surgery of the present invention;

[0032] Figure 7 It is a schematic diagram of the structure of the rotating component and the applying component in the dressing device for burn surgery of the present invention;

[0033] Figure 8 The figure is a schematic diagram of the locking assembly structure in the burn surgery dressing device of the present invention.

[0034] In the figure: 100, main body component; 101, body assembly; 101a, base; 101b, electric telescopic rod; 101c, first dressing half shell; 101d, swing groove; 101e, slide bar; 101f, second dressing half shell; 101g, movable opening; 101h, sliding groove; 101i, output groove; 101j, protrusion; 101k, rotation groove; 101l, limiting groove; 102, dressing assembly; 102a, material box; 102b, spraying semi-ring; 102c, fastening groove; 102d, nozzle; 103, support assembly; 103a, L-shaped support ring; 103b, chute; 103c, movable groove; 103d, first arc-shaped elastic member; 103e, abutting member; 103f, fastener; 103e-1, movable half ring; 103e-2, abutting rod; 103e-3, fastening cavity; 103f-1, wedge block; 103f-2, limiting rod; 103f-3, baffle; 103f-4, second elastic member; 104, drive assembly; 104a, threaded rod; 104b, lever; 200, wiping component; 201, rotation assembly; 201a, rotating disc; 201b, guide rod; 201c, drive rod; 201d, locking groove; 201e, guide groove; 202, smearing assembly; 202a, arc-shaped rod; 202b, connecting rod; 202c, smearing bead; 203, locking assembly; 203a, locking block; 203b, third elastic member. Detailed implementation manners

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Example 1, refer to Figures 1 to 2As shown, it is the first embodiment of the present invention, which provides a dressing device for burn surgery, including a main body component 100, including a main body component 101, a dressing component 102 fixedly connected to the main body component 101, a support component 103 sleeved outside the dressing component 102, and a drive component 104 threadedly connected to the support component 103; a wiping component 200, including a rotating component 201 rotatably connected in the main body component 101, a smearing component 202 slidably connected outside the rotating component 201, and a locking component 203 arranged outside the rotating component 201. First, the patient's burn position is placed in the main body component 101, and the dressing component 102 is connected to the support component 103, and then the driving component 104 is rotated to control the support component 103 to move. During the movement, the dressing support component 103 will drive the dressing component 102 to swing and spray, so that the medicine sprayed on the burn part is more uniform and conducive to subsequent recovery.

[0037] Before spraying, the rotational force is converted into a sliding force by toggling the rotating component 201 and transmitted to the application component 202, so that the application component 202 can contact the patient's epidermis and is restricted by the locking component 203 to prevent the application component 202 from leaving the patient's epidermis. In this way, during the sliding process of the above-mentioned supporting component 103, the application component 202 will be driven to follow the movement and evenly apply the excess medicine to the patient's burn position.

[0038] Example 2, reference Figures 1 to 6 , which is the second embodiment of the present invention. Different from the previous embodiment, the main body component 101 includes a base 101a, an electric telescopic rod 101b fixedly connected to the base 101a, a dressing half shell 101c fixedly connected to the end of the electric telescopic rod 101b, a sliding rod 101e fixedly connected to the dressing half shell 101c, and a dressing half shell 2 101f slidably connected to the outside of the sliding rod 101e. A pair of electric telescopic rods 101b are fixedly connected to the end of the base 101a, and the ends of the pair of electric telescopic rods 101b are commonly fixedly connected to the dressing half shell 101c, the dressing half shell 101c is fixedly connected to the sliding rod 101e, and the dressing half shell 2 101f is slidably connected to the outside of the sliding rod 101e, and the dressing half shell 2 101f and the dressing half shell 1 101c can form a cylinder.

[0039] Further, a movable opening 101g is provided on the second dressing half shell 101f; the dressing assembly 102 includes a material box 102a fixedly connected to the second dressing half shell 101f, a spraying half ring 102b connected to the material box 102a through a material conveying pipe, and a plurality of nozzles 102d installed on the inner wall of the spraying half ring 102b. A movable opening 101g is provided on the second dressing half shell 101f. The top of the second dressing half shell 101f is fixedly connected to the material box 102a. The material box 102a is connected to the spraying half ring 102b through a material conveying pipe. A plurality of nozzles 102d are installed at the inner wall of the spraying half ring 102b.

[0040] Further, a fastening groove 102c is provided at the end of the spraying half ring 102b. Sliding grooves 101h are provided on the inner walls of both the first dressing half shell 101c and the second dressing half shell 101f; the support assembly 103 includes an L-shaped support ring 103a slidably connected in the sliding groove 101h, a sliding groove 103b provided on the inner wall of the L-shaped support ring 103a, an arc-shaped elastic member 103d arranged in the sliding groove 103b, a contact member 103e slidably connected in the sliding groove 103b, and a fastener 103f slidably connected in the fastening groove 102c; wherein, the spraying half ring 102b is slidably connected in the sliding groove 103b. Sliding grooves 101h are provided on the side edges of the inner walls of both the first dressing half shell 101c and the second dressing half shell 101f. An L-shaped support ring 103a is slidably connected in each of the pair of sliding grooves 103b. A sliding groove 103b is provided in each of the pair of L-shaped support rings 103a. An arc-shaped elastic member 103d is arranged in the L-shaped support ring 103a within the first dressing half shell 101c. The end of the arc-shaped elastic member 103d is fixedly connected to the contact member 103e. The fastener 103f is arranged within the spraying half ring 102b.

[0041] Further, the contact member 103e includes a movable half ring 103e-1 slidably connected in the sliding groove 103b, a contact rod 103e-2 fixedly connected to the end of the movable half ring 103e-1, and a fastening cavity 103e-3 provided on the contact rod 103e-2. The movable half ring 103e-1 is slidably connected in the sliding groove 103b of the L-shaped support ring 103a within the first dressing half shell 101c. The end of the movable half ring 103e-1 is fixedly connected to the contact rod 103e-2. A fastening cavity 103e-3 is provided on the side of the contact rod 103e-2.

[0042] Further, the fastener 103f includes a wedge block 103f-1 slidably connected in the fastening groove 102c, a limiting rod 103f-2 fixedly connected to the end of the wedge block 103f-1, a baffle 103f-3 fixedly connected to the end of the limiting rod 103f-2, and a second elastic member 103f-4 sleeved outside the limiting rod 103f-2 and located between the baffle 103f-3 and the movable half-ring 103e-1. The L-shaped support ring 103a in the dressing half-ring two is slidably connected with a spraying half-ring 102b in the sliding groove 103b. A fastening groove 102c is formed at the end of the spraying half-ring 102b corresponding to the position of the contact rod 103e-2. The wedge block 103f-1 is slidably connected in the fastening groove 102c. The end of the wedge block 103f-1 is fixedly connected with the limiting rod 103f-2. The end of the limiting rod 103f-2 penetrates through the fastening groove 102c and is fixedly connected with the baffle 103f-3. A second elastic member 103f-4 is sleeved outside the limiting rod 103f-2 and located between the baffle 103f-3 and the spraying half-ring 102b.

[0043] Further, a swinging groove 101d is formed on the inner wall of the dressing half-shell one 101c, and a movable groove 103c is formed on the L-shaped support ring 103a; the driving assembly 104 includes a threaded rod 104a rotatably connected in the sliding groove 101h, and a dial rod 104b fixedly connected to the movable half-ring 103e-1; wherein, the dial rod 104b is movably connected in the swinging groove 101d, and the dial rod 104b is adapted to the movable groove 103c. A swinging groove 101d is formed on the inner wall of the dressing half-shell one 101c, a movable groove 103c is formed on the L-shaped support ring 103a in the dressing half-shell one 101c, the dial rod 104b is movably connected in the swinging groove 101d, the end of the dial rod 104b is connected to the movable half-ring 103e-1, the dial rod 104b can slide in the movable groove 103c, and the threaded rod 104a is rotatably connected to the position of the sliding groove 101h in the dressing half-shell one 101c.

[0044] Working principle: First, the electric telescopic rod 101b is driven to move the dressing half shell 101c and the dressing half shell 101f to a specified height, and then the dressing half shell 101c and the dressing half shell 101f are separated along the sliding rod 101e, and then the burn part is placed between the dressing half shell 101c and the dressing half shell 101f, and then the dressing half shell 101c and the dressing half shell 101f are merged. After the merger, the interference rod 103e-2 will enter the fastening groove 102c at the same time. When the wedge block 103f-1 slides to the side, the limit rod 103f-2 will drive the baffle 103f-3 to move during the sliding of the wedge block 103f-1, and at the same time pull the elastic member 103f-4 to deform and store force, and when the position of the fastening cavity 103e-3 of the contact rod 103e-2 reaches the position of the wedge block 103f-1, the elastic member 103f-4 will pull the baffle 103f-3 and the limit rod 103f-2 to slide into the fastening groove 102c, and at the same time the wedge block 103f -1 will be embedded in the fastening cavity 103e-3, realizing the connection between the moving half ring 103e-1 and the spraying half ring 102b, thereby driving the threaded rod 104a to rotate. Since the moving half ring 103e-1 and the spraying half ring 102b are both movably connected in the L-shaped support ring 103a, when the threaded rod 104a drives one L-shaped support ring 103a to move, a pair of L-shaped support rings 103a will be under the influence of the moving half ring 103e-1 and the spraying half ring 102b. The moving half ring 103e-1 slides in the sliding groove 101h, and during the movement, the moving half ring 103e-1 will drive the lever 104b to slide in the swinging groove 101d. In this process, the medicine in the material box 102a is transported to the spraying half ring 102b through the feeding pipe and sprayed to the burned part through the nozzle 102d. In this way, the spraying half ring 102b will swing and spray while moving forward to the burned part under the action of the moving half ring 103e-1, so that the medicine sprayed on the burned part is more evenly distributed, which is conducive to subsequent recovery.

[0045] Example 3, reference Figures 1 to 8, which is the third embodiment of the present invention. Different from the previous embodiment, an output groove 101i is provided on the dressing half shell two 101f, a rotating groove 101k is provided on the inner wall of the dressing half shell two 101f, and a limiting groove 101l is provided in the dressing half shell two 101f within the rotating groove 101k; the rotating assembly 201 includes a rotating disk 201a rotatably connected in the rotating groove 101k, a guiding groove 201e opened on the rotating disk 201a, a guiding rod 201b movably connected in the guiding groove 201e, and a driving rod 201c fixedly connected to the outside of the rotating disk 201a; wherein, the driving rod 201c moves within the output groove 101i, a rotating groove 101k is provided within the dressing half shell two 101f, a rotating disk 201a is rotatably connected within the rotating groove 101k, a guiding groove 201e is opened at the position of the rotating disk 201a within the limiting groove 101l, a guiding rod 201b is movably connected within the guiding groove 201e, the guiding rod 201b has a telescopic function, the end of the guiding rod 201b penetrates through the guiding groove 201e and is slidably connected within the limiting groove 101l, an output groove 101i is provided on the side of the dressing half shell two 101f, and a driving rod 201c is fixedly connected to the rotating disk 201a at the position of the output groove 101i.

[0046] Furthermore, the smearing assembly 202 includes an arc-shaped rod 202a fixedly connected to the end of the guiding rod 201b, a connecting rod 202b fixedly connected to the outside of the arc-shaped rod 202a, and a plurality of smearing beads 202c rotatably connected to the outside of the arc-shaped rod 202a. The end of the guiding rod 201b is fixedly connected to an arc-shaped rod 202a, a plurality of smearing beads 202c are rotatably connected to the outside of the arc-shaped rod 202a, a connecting rod 202b is fixedly connected to one side of the arc-shaped rod 202a located at the L-shaped support ring 103a, and the connecting rod 202b is slidably connected to the outside of the L-shaped support rod.

[0047] Furthermore, a locking groove 201d is provided on the outside of the driving rod 201c, and a plurality of protrusions 101j are fixedly connected to the inner wall of the output groove 101i; the locking assembly 203 includes a locking block 203a slidably connected within the locking groove 201d, and an elastic member three 203b provided between the locking block 203a and the inner wall of the locking groove 201d. A plurality of protrusions 101j are fixedly connected to the inner wall of the output groove 101i, a locking groove 201d is opened at the position of the protrusions 101j on the driving rod 201c, a locking block 203a is slidably connected within the locking groove 201d, and an elastic member three 203b is provided between the locking block 203a and the inner wall of the locking groove 201d.

[0048] Working principle: The rotating disk 201a is driven to rotate by toggling the driving rod 201c, so that the inner wall of the guide groove 201e will contact the guide rod 201b, and the guide rod 201b will move along the trajectory of the limiting groove 101l. When the smear bead 202c contacts the patient's epidermis, the driving rod 201c is stopped from being toggled, and the locking block 203a inside it will be embedded between multiple protrusions 101j and locked. In this way, the smear bead 202c outside the arc rod 202a can be controlled to approach the patient's burn site, and in the process of the movement of the above-mentioned L-shaped support ring 103a, the smear bead 202c outside the arc rod 202a is driven to move at the patient's burn site, so that the excess medicine at the burn site can be evenly applied.

[0049] The rest of the structure is the same as that of Example 2.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dressing device for burn surgery, characterized in that: include, The main body component (100) comprises a body component (101), a dressing component (102) fixedly connected to the body component (101), a support component (103) sleeved outside the dressing component (102), and a drive component (104) threadedly connected to the support component (103); The wiping component (200) comprises a rotating component (201) rotatably connected inside the body component (101), a smearing component (202) slidably connected outside the rotating component (201), and a locking component (203) arranged outside the rotating component (201).

2. The post-burn dressing device according to claim 1, characterized in that: The main body component (101) comprises a base (101a), an electric telescopic rod (101b) fixedly connected to the base (101a), a dressing half shell (101c) fixedly connected to the end of the electric telescopic rod (101b), a sliding rod (101e) fixedly connected to the dressing half shell (101c), and a dressing half shell (101f) slidably connected to the outside of the sliding rod (101e).

3. The post-burn dressing device according to claim 2, characterized in that: The dressing half shell (101f) is provided with a movable opening (101g); The dressing assembly (102) comprises a material box (102a) fixedly connected to the dressing half shell (101f), a spraying half ring (102b) connected to the material box (102a) via a material delivery pipe, and a plurality of nozzles (102d) installed on the inner wall of the spraying half ring (102b).

4. The post-burn dressing device according to claim 3, characterized in that: The end of the spraying half ring (102b) is provided with a fastening groove (102c), and the inner walls of the dressing half shell one (101c) and the dressing half shell two (101f) are both provided with sliding grooves (101h); The support assembly (103) comprises an L-shaped support ring (103a) slidably connected in the sliding groove (101h), a sliding groove (103b) provided on the inner wall of the L-shaped support ring (103a), an arc-shaped elastic member (103d) provided in the sliding groove (103b), a resisting member (103e) slidably connected in the sliding groove (103b), and a fastener (103f) slidably connected in the fastening groove (102c); Wherein, the spraying half ring (102b) is slidably connected in the slide groove (103b).

5. The post-burn dressing device according to claim 4, characterized in that: The resistance member (103e) comprises a moving half ring (103e-1) slidably connected in the sliding groove (103b), a resistance rod (103e-2) fixedly connected to the end of the moving half ring (103e-1), and a fastening cavity (103e-3) opened on the resistance rod (103e-2).

6. The post-burn dressing device according to claim 5, characterized in that: The fastener (103f) comprises a wedge block (103f-1) slidably connected in the fastening groove (102c), a limiting rod (103f-2) fixedly connected to the end of the wedge block (103f-1), a baffle plate (103f-3) fixedly connected to the end of the limiting rod (103f-2), and a second elastic member (103f-4) sleeved outside the limiting rod (103f-2) and located between the baffle plate (103f-3) and the movable half ring (103e-1).

7. The post-burn dressing device according to claim 6, characterized in that: The inner wall of the dressing half shell (101c) is provided with a swing groove (101d), and the L-shaped support ring (103a) is provided with a movable groove (103c); The driving assembly (104) comprises a threaded rod (104a) rotatably connected to the sliding groove (101h), and a shifting rod (104b) fixedly connected to the moving half ring (103e-1); The lever (104b) is movably connected in the swing groove (101d), and the lever (104b) is adapted to the movable groove (103c).

8. The post-burn dressing device according to claim 7, characterized in that: The second dressing half shell (101f) is provided with an output groove (101i), the inner wall of the second dressing half shell (101f) is provided with a rotation groove (101k), and the second dressing half shell (101f) is provided with a limiting groove (101l) in the rotation groove (101k); The rotating assembly (201) comprises a rotating disk (201a) rotatably connected to the rotating groove (101k), a guide groove (201e) provided on the rotating disk (201a), a guide rod (201b) movably connected to the guide groove (201e), and a driving rod (201c) fixedly connected to the outside of the rotating disk (201a); Wherein, the driving rod (201c) moves in the output slot (101i).

9. The post-burn dressing device according to claim 8, characterized in that: The smear assembly (202) comprises an arc-shaped rod (202a) fixedly connected to the end of the guide rod (201b), a connecting rod (202b) fixedly connected outside the arc-shaped rod (202a), and a plurality of smear beads (202c) rotatably connected outside the arc-shaped rod (202a).

10. The post-burn dressing device according to claim 9, characterized in that: The driving rod (201c) is provided with a locking groove (201d) on the outside, and the inner wall of the output groove (101i) is fixedly connected with a plurality of protrusions (101j); The locking assembly (203) comprises a locking block (203a) slidably connected in the locking groove (201d), and an elastic member (203b) disposed between the locking block (203a) and the inner wall of the locking groove (201d).

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