Handle assembly

Abstract

The utility model relates to the field of medical instruments, in particular to a handle assembly. The handle assembly comprises a main body, a movable rod, an operating handle and a connecting rod; the movable rod is movably connected with the main body in the preset direction, and the movable rod is used for being in transmission connection with an external movable part; the operating handle is rotatably connected with the main body, and the operating handle is in transmission connection with the movable rod through the connecting rod, so that the operating handle can rotate relative to the main body under the action of external force and drives the movable rod to move in the preset direction; and the connecting rod is bent towards the direction of the movable rod. The handle assembly is simple in structure, long in opening and closing stroke, large in transmission torque and capable of improving operation stability, reducing operation difficulty and meeting more application requirements.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, and more specifically, to a handle assembly. Background Art

[0002] Currently, for surgical devices controlled by a handle, most of them drive the internal moving mechanism to move through the operating handle on the handle, and then pull the control wire inside the handle to move, so as to realize the control of the surgical tool. However, when the existing handle realizes the control, it is prone to instability under large forces, and its operation difficulty is relatively high. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a handle assembly, which has a simple structure, a long opening and closing stroke, a large transmitted torque, can improve the operation stability, reduce the operation difficulty, and can meet more application requirements.

[0004] The embodiments of the utility model can be implemented as follows:

[0005] The utility model provides a handle assembly, which includes a main body, a movable rod, an operating handle and a connecting rod;

[0006] The movable rod is movably connected to the main body along a preset direction, and the movable rod is used for driving connection with an external movable part;

[0007] The operating handle is rotatably connected to the main body, and the operating handle is drivingly connected to the movable rod through the connecting rod, so that the operating handle can rotate relative to the main body under an external force and drive the movable rod to move along the preset direction;

[0008] Wherein, the connecting rod is bent towards the direction of the movable rod.

[0009] In an alternative embodiment, the handle assembly further includes an elastic member;

[0010] The elastic member is disposed at the rotational connection between the operating handle and the main body, or at the connection between the movable rod and the main body, so that the movable rod has a tendency to return to its initial position.

[0011] In an alternative embodiment, at least one first guiding post is disposed in the main body, and a first guiding groove slidably engaged with the first guiding post is formed in the movable rod along the preset direction; and / or, a second guiding post is connected to the movable rod, and a second guiding groove slidably engaged with the second guiding post is formed in the main body along the preset direction.

[0012] In an alternative embodiment, two first guiding posts are disposed in the main body, and the two first guiding posts are arranged at intervals along the preset direction and are both slidably engaged with the first guiding groove.

[0013] In an alternative embodiment, a relief groove for accommodating the connecting rod is formed in the first guiding post, and the relief groove communicates with the guiding groove.

[0014] In an alternative embodiment, the handle assembly further includes a limiting unit connected to the main body, and the limiting unit is configured to abut against or engage with the movable rod to limit the movement of the movable rod in a preset direction.

[0015] In an alternative embodiment, the limiting unit includes a limiting handle, a limiting member, and a connecting rod;

[0016] The limiting handle is rotatably connected to the main body and is spaced apart from the operating handle; the limiting member is slidably connected to the main body; two ends of the connecting rod are respectively hinged to the limiting handle and the limiting member;

[0017] The limiting handle is configured to rotate relative to the main body under the action of an external force, and then drive the limiting member away from or close to the movable rod through the connecting rod to engage with the movable rod to limit its movement.

[0018] In an alternative embodiment, the main body is provided with a first movable groove and a second movable groove;

[0019] The first movable groove is arranged around the rotation axis of the limiting handle, and the first rotating shaft at the hinge of the connecting rod and the limiting handle is slidably matched with the first movable groove;

[0020] The second movable groove is arranged in a direction at an angle to the preset direction, and the second rotating shaft at the hinge of the limiting member and the connecting rod is slidably matched with the second movable groove.

[0021] In an alternative embodiment, the movable rod is provided with a limiting rack, and the limiting rack is arranged on one side of the movable rod facing the limiting member;

[0022] The limiting member is provided with teeth for engaging with the limiting rack.

[0023] In an alternative embodiment, the limiting unit further includes a limiting torsion spring sleeved at the hinge of the limiting member and the connecting rod, and the limiting torsion spring is configured to make the limiting member tend to rotate to a position where the teeth engage with the limiting rack.

[0024] The beneficial effects of the handle assembly provided by the embodiments of the present invention include:

[0025] The handle assembly includes a main body, a movable rod, an operating handle, and a connecting rod; the movable rod is movably connected to the main body along a preset direction, and the movable rod is used for driving connection with an external movable part; the operating handle is rotatably connected to the main body, and the operating handle is drivingly connected to the movable rod through the connecting rod, so that the operating handle can rotate relative to the main body under an external force and drive the movable rod to move along the preset direction; wherein, the connecting rod is bent in the direction towards the movable rod. The handle assembly has a simple structure, can have a long opening and closing stroke, and can transmit a large torque, can improve the operation stability, reduce the operation difficulty, and can meet more application requirements. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 Internal structure schematic diagram of the handle assembly provided in this embodiment from the first perspective;

[0028] Figure 2 Structure schematic diagram of the handle assembly provided in this embodiment;

[0029] Figure 3 Internal structure schematic diagram of the handle assembly provided in this embodiment from the second perspective;

[0030] Figure 4 Structure schematic diagram of the main body provided in this embodiment;

[0031] Figure 5 Structure schematic diagram of the movable rod, operating handle and connecting rod provided in this embodiment from the first perspective;

[0032] Figure 6 Structure schematic diagram of the movable rod, operating handle and connecting rod provided in this embodiment from the second perspective;

[0033] Figure 7 Structure schematic diagram of the handle assembly provided in this embodiment when including a limiting unit;

[0034] Figure 8 Structure schematic diagram of the movable rod, operating handle, connecting rod and limiting unit provided in this embodiment from the first perspective;

[0035] Figure 9 Structure schematic diagram of the movable rod, operating handle, connecting rod and limiting unit provided in this embodiment from the second perspective;

[0036] Figure 10 The structural schematic diagram of the handle assembly provided for this embodiment when including the limiting unit and the main body.

[0037] Icons: 100 - handle assembly; 110 - main body; 120 - movable rod; 130 - operating handle; 140 - connecting rod; 111 - first guiding post; 121 - first guiding groove; 122 - second guiding post; 112 - second guiding groove; 123 - relief groove; 150 - limiting unit; 151 - limiting handle; 152 - limiting member; 153 - connecting rod; 113 - first movable groove; 114 - second movable groove; 154 - limiting rack; 155 - engaging teeth; 156 - limiting torsion spring. Detailed implementation manners

[0038] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the protection scope of the present utility model.

[0040] It should be noted that: similar reference numerals and letters denote similar items in the following accompanying drawings. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in the subsequent accompanying drawings.

[0041] In the description of the present utility model, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings or the orientation or positional relationship when the product of this utility model is usually placed. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0042] In addition, if terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0043] It should be noted that, without conflict, the features in the embodiments of the present utility model can be combined with each other.

[0044] Please refer to Figures 1-6 , this embodiment provides a handle assembly 100, which includes a main body 110, a movable rod 120, an operating handle 130, and a connecting rod 140;

[0045] The movable rod 120 is movably connected to the main body 110 along a preset direction, and the movable rod 120 is used for driving connection with an external movable part;

[0046] The operating handle 130 is rotatably connected to the main body 110, and the operating handle 130 is drivingly connected to the movable rod 120 through the connecting rod 140, so that the operating handle 130 can rotate relative to the main body 110 under an external force and drive the movable rod 120 to move along the preset direction;

[0047] Wherein, the connecting rod 140 is bent in the direction towards the movable rod 120.

[0048] Please refer to Figures 1-6 , the working principle of the handle assembly 100 is as follows:

[0049] First of all, the handle assembly 100 can be used as a manipulation handle of a medical device, which can be connected to a manipulation wire or other transmission parts, and thus can realize the manipulation control of a distal surgical tool, and the surgical tool can be a surgical instrument operated and controlled through the handle.

[0050] The handle assembly 100 includes a main body 110, a movable rod 120, an operating handle 130, and a connecting rod 140; wherein, the movable rod 120 is movably connected to the main body 110 along a preset direction, and the movable rod 120 is used for driving connection with an external movable part, that is, connected to the manipulation wire connected to the surgical tool, and thus can realize the operation control of the distal surgical tool;

[0051] The operating handle 130 is rotatably connected to the main body 110, and the operating handle 130 is drivingly connected to the movable rod 120 through the connecting rod 140, so that the operating handle 130 can rotate relative to the main body 110 under an external force and drive the movable rod 120 to move along the preset direction; thus, during use, the operator can hold the main body 110 of the handle assembly 100 and operate the operating handle 130. Then, when the operating handle 130 rotates relative to the main body 110, the movable rod 120 can be driven by the connecting rod 140 to slide relative to the main body 110 along the preset direction, and then pull the manipulation wire to move, so as to control the distal surgical tool;

[0052] During this process, the driving force is transmitted to the movable rod 120 through the connecting rod 140. Therefore, in this embodiment, the connecting rod 140 is bent in the direction towards the movable rod 120. In this way, it can not only cooperate with the above-mentioned structural setting method to increase the movement stroke of the movable rod 120, but also convert the circular motion into a linear motion with higher efficiency, so that both the transmitted torque and the stroke range are larger. In addition, on the basis of the above structure, the structure of the handle assembly 100 is simpler, occupies less space, can be quickly converted into a linear motion, and has a wider application range.

[0053] In summary, the handle assembly 100 has a simple structure, can have a long opening and closing stroke, and can transmit a large torque. It can improve the operation stability, reduce the operation difficulty, and meet more application requirements.

[0054] Further, please refer to Figures 1-6 , in this embodiment, the handle assembly 100 further includes an elastic member; the elastic member is disposed at the rotational connection between the operation handle 130 and the main body 110, or is disposed at the connection between the movable rod 120 and the main body 110, so that the movable rod 120 has a tendency to return to its initial position. It should be noted that in this embodiment, when configuring the movable rod 120, its initial position can be adjusted according to actual use requirements. In this embodiment, one end of its movement along the preset direction to the end of the stroke is its initial position.

[0055] On this basis, when the operator uses the handle assembly 100, the operation handle 130 can be pressed, and then the movable rod 120 can be driven by the connecting rod 153 to move relative to the main body 110, so as to move away from its initial position. At this time, the elastic member is compressed, and then after the operation handle 130 is released, the operation handle 130 can return to the initial position under the action of the elastic member. It should be noted that from the above content, when configuring the elastic member, it can be configured at the rotational connection between the operation handle 130 and the main body 110, or at the connection between the movable rod 120 and the main body 110; specifically, when it is configured at the rotational connection between the operation handle 130 and the main body 110, a torsion spring structure can be adopted, and its purpose is to achieve elastic compression based on the rotation of the operation handle 130, and then drive the operation handle 130 to rotate and reset through elastic force; when the elastic member is configured at the connection between the movable rod 120 and the main body 110, it can be a spring. At this time, based on the linear movement of the movable rod 120, it can compress the spring under the action of an external force and then reset to the initial position when the external force disappears.

[0056] Moreover, when the movable rod 120 moves within the main body 110, it linearly moves relative to the main body 110 along a preset direction. During this process, to improve the smoothness of its movement, therefore, a guiding structure is configured on the main body 110 or the movable rod 120, and there are various setting methods for the guiding structure. In this embodiment, at least one first guiding column 111 is configured within the main body 110, and the movable rod 120 is provided with a first guiding groove 121 that slidably cooperates with the first guiding column 111 along the preset direction; and / or, the movable rod 120 is connected with a second guiding column 122, and the main body 110 is provided with a second guiding groove 112 that slidably cooperates with the second guiding column 122 along the preset direction.

[0057] Among them, when configuring the first guiding column 111 on the main body 110, in this embodiment, two first guiding columns 111 are configured within the main body 110 as an example for illustration. Moreover, the two first guiding columns 111 are arranged at intervals along the preset direction and are both slidably cooperated with the first guiding groove 121. Therefore, the two first guiding columns 111 can play a role in positioning and guiding the movement of the movable rod 120 in the preset direction; and when configuring the first guiding groove 121, the method of setting it as a strip-shaped groove extending along the preset direction is adopted. The purpose is to realize guiding by the contact between the opposite side walls of the first guiding column 111 and the first guiding groove 121; it should be noted that in the embodiments of the present utility model, the movement stroke of the movable rod 120 relative to the main body 110 along the preset direction can also be adjusted by adjusting the intervals of the multiple first guiding columns 111, and the number of the first guiding columns 111 can be adjusted according to actual needs;

[0058] In addition, it is also possible to adopt the method of connecting a second guiding column 122 to the movable rod 120 and providing a second guiding groove 112 that slidably cooperates with the second guiding column 122 on the main body 110 along the preset direction, that is, contrary to the setting positions of the above-mentioned first guiding column 111 and the first guiding groove 121, the columnar structure with guiding is configured on the movable rod 120, and the groove type cooperating with the column is arranged on the main body 110. Its guiding principle is the same as that of the above-mentioned first guiding column 111 and the first guiding groove 121, so it will not be elaborated here.

[0059] On the basis of the above-mentioned guiding structure, in addition to the method of separately setting the first guiding column 111 and the first guiding groove 121 cooperating with the first guiding column 111, and separately setting the second guiding column 122 and the first guiding groove 121 cooperating with the second guiding column 122, it is also possible to adopt the method of simultaneously setting the first guiding column 111, the second guiding column 122, the first guiding groove 121, and the second guiding groove 112, and the purpose is to improve the stability of movement.

[0060] Please refer to Figures 1-6, in this embodiment, when configuring the above-mentioned connecting rod 140, the connecting rod 140 is bent, so that when the operating handle 130 drives the movable rod 120 to move through the connecting rod 140, its driving effect can be parallel or approximately parallel to the moving direction of the movable rod 120, thereby reducing the component force of the driving force in the non-preset direction, and further increasing its driving effect. Based on this, to prevent the bent connecting rod 140 from rotating in the direction towards the movable rod 120 and driving the movable rod 120 to move, resulting in movement interference between it and the movable rod 120, a relief groove 123 for accommodating the connecting rod 140 is provided on the first guide post 111, and the relief groove 123 communicates with the guide groove. Through the setting of the relief groove 123, when the connecting rod 140 rotates in the direction towards the movable rod 120, it can play a role in making way, thereby avoiding movement interference between the movable rod 120 and the connecting rod 140.

[0061] Based on the above structure, when operating the handle assembly 100, it is necessary to lock it at an appropriate position during its movement to prevent its position from changing and affecting the use operation. Based on this, please refer to Figures 7-10 , and in combination with Figures 1-6 , the handle assembly 100 further includes a limiting unit 150 connected to the main body 110. The limiting unit 150 is used to abut against or engage with the movable rod 120 to limit the movement of the movable rod 120 in a preset direction. That is, through the setting of the limiting unit 150, when the operating handle 130 drives the movable rod 120 to move to an appropriate position, by operating the limiting unit 150, its relative position can be maintained, thereby preventing its position from changing, and thus ensuring the stability of its use.

[0062] Specifically, the limiting unit 150 in this embodiment may include a limiting handle 151, a limiting member 152, and a connecting rod 153;

[0063] The limiting handle 151 is rotatably connected to the main body 110 and is spaced from the operating handle 130; the limiting member 152 is slidably connected to the main body 110; both ends of the connecting rod 153 are hinged to the limiting handle 151 and the limiting member 152 respectively;

[0064] The limiting handle 151 is used to rotate relative to the main body 110 under the action of an external force, and then drive the limiting member 152 away from the movable rod 120 or close to the movable rod 120 to engage with the movable rod 120 to limit its movement.

[0065] Among them, the user can operate the limit handle 151, thereby driving it to rotate relative to the main body 110, so as to drive the limiting member 152 to abut or engage with the movable rod 120 through the connecting rod 153, thereby restricting the movement of the movable rod 120. Moreover, according to its specific usage requirements, the user can choose to limit the one-way or two-way movement of the movable rod 120 along the preset direction by the limiting unit 150; in this embodiment, the way that the limiting member 152 engages with the movable rod 120 is adopted, and one-way locking can be achieved. The purpose is to be able to, according to the needs of use, when completing the corresponding work, for example, after the surgical tool at its distal end grabs the lesion, the surgical tool can be continuously grabbed by operating the handle 130. Therefore, the one-way locking method is adopted in this embodiment.

[0066] On the basis of the above structure, in order to enable the limit handle 151 to rotate relative to the main body 110 and drive the limiting member 152 to move through the connecting rod 153, therefore, the main body 110 is provided with a first movable groove 113 and a second movable groove 114;

[0067] The first movable groove 113 is arranged around the rotation axis of the limit handle 151, and the first rotating shaft at the hinge joint of the connecting rod 153 and the limit handle 151 is slidably matched with the first movable groove 113; the second movable groove 114 is arranged along a direction at an angle to the preset direction, and the second rotating shaft at the hinge joint of the limiting member 152 and the connecting rod 153 is slidably matched with the second movable groove 114. It should be noted that in the above structure, the hinge joints of the limit handle 151 with the connecting rod 153 and the main body 110 are spaced apart.

[0068] In order to enable the limiting member 152 to engage with the movable rod 120, therefore, the movable rod 120 is provided with a limit rack 154, and the limit rack 154 is arranged on the side of the movable rod 120 facing the limiting member 152; the limiting member 152 is provided with engaging teeth 155 for engaging with the limit rack 154. Such a setting method aims to enable the limiting member 152 to engage with one of the teeth on the limit rack 154 under the driving action of the limit handle 151 when the movable member moves within its movable stroke, so as to be able to perform engaging and limiting at any position within the stroke; and during use, in order to enable the engaging teeth 155 on the limiting member 152 to maintain a position where they can engage with the limit rack 154, therefore, the limiting unit 150 further includes a limiting torsion spring 156 sleeved on the hinge joint of the limiting member 152 and the connecting rod 153, and the limiting torsion spring 156 is used to make the limiting member 152 have a tendency to rotate towards the position where the engaging teeth 155 engage with the limit rack 154. As can be seen from the above content, the one-way locking method is adopted in this embodiment. Therefore, the limit rack 154 uses a sawtooth shape, so that step-by-step locking can be achieved, that is, lock once by pressing once.

[0069] In summary, please refer to Figures 1-10, the handle assembly 100 transmits the driving force to the movable rod 120 via the connecting rod 140 by rotating the operating handle 130, causing it to move in a preset direction, thereby realizing the manipulation and control of the surgical tool at the distal end of the handle assembly 100. The bent setting of the connecting rod 140 can efficiently convert the circular motion of the operating handle 130 into the linear motion of the movable rod 120, while increasing the movement stroke and transmission torque. In addition, the position of the movable rod 120 can be locked by the limiting unit 150 to prevent its position from changing during operation and ensure the stability of use.

[0070] Its working process is as follows:

[0071] Initial state: The handle assembly 100 is in the initial position, the movable rod 120 is at one end of the stroke in the preset direction, and the limiting unit 150 is in the unlocked state;

[0072] Operation process: The operator holds the main body 110 of the handle assembly 100, presses the operating handle 130, and the operating handle 130 drives the movable rod 120 to slide in the preset direction through the connecting rod 140, thereby pulling the operating wire to move and realizing the control of the surgical tool; at this time, the elastic member is compressed;

[0073] Locking process: When the movable rod 120 moves to an appropriate position, the operator operates the limiting handle 151 to drive the limiting member 152 close to the movable rod 120, so that its engaging teeth 155 are engaged with the limiting rack 154 on the movable rod 120, thereby restricting the movement of the movable rod 120 and keeping its position stable;

[0074] Reset process: After releasing the operating handle 130, the elastic member returns to its deformed state, driving the operating handle 130 and the movable rod 120 back to the initial position, and the limiting unit 150 is unlocked.

[0075] The handle assembly 100 has the following advantages:

[0076] The structural design of the handle assembly 100 is simple, easy to manufacture and assemble; the bent setting of the connecting rod 140 can efficiently convert the circular motion into the linear motion, increasing the movement stroke and transmission torque of the movable rod 120; the design of the limiting unit 150 can lock the position of the movable rod 120 to prevent its position from changing during operation and improve the operation stability; the operation mode of the handle assembly 100 is simple and intuitive, reducing the operation difficulty and improving the use convenience; the handle assembly 100 has a compact structure and occupies a small space, which can meet the application requirements of more medical devices.

[0077] It should be noted that in this embodiment, when configuring the corresponding structures such as the main body 110, the operating handle 130, and the limiting handle 151, their shapes can be adjusted according to the actual use requirements to facilitate the operation of the operator.

[0078] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A handle assembly, characterized in that: The handle assembly comprises a main body, a movable rod, an operating handle and a connecting rod; The movable rod is movably connected to the main body along a preset direction, and the movable rod is used for transmission connection with an external movable part; The operating handle is rotatably connected to the main body, and the operating handle is transmission-connected to the movable rod through the connecting rod, so that the operating handle can rotate relative to the main body under external force and drive the movable rod to move along the preset direction; Wherein, the connecting rod is bent toward the direction of the movable rod.

2. The handle assembly according to claim 1, characterized in that: The handle assembly also includes an elastic member; The elastic member is arranged at the rotation connection between the operating handle and the main body, or at the connection between the movable rod and the main body, so that the movable rod has a tendency to return to its initial position.

3. The handle assembly according to claim 1, characterized in that: At least one first guide column is arranged in the main body, and the movable rod is provided with a first guide groove slidingly matched with the first guide column along the preset direction; and / or the movable rod is connected to the second guide column, and the main body is provided with a second guide groove slidingly matched with the second guide column along the preset direction.

4. The handle assembly according to claim 3, characterized in that: Two first guide posts are arranged in the main body, and the two first guide posts are arranged at intervals along the preset direction and are both slidably matched with the first guide groove.

5. The handle assembly according to claim 3, characterized in that: The first guide column is provided with a clearance groove for accommodating the connecting rod, and the clearance groove is communicated with the guide groove.

6. The handle assembly according to any one of claims 1 to 5, characterized in that: The handle assembly further comprises a limiting unit connected to the main body, wherein the limiting unit is used to abut or engage with the movable rod to limit the movement of the movable rod in a preset direction.

7. The handle assembly according to claim 6, characterized in that: The limiting unit includes a limiting handle, a limiting member and a connecting rod; The limit handle is rotatably connected to the main body and is spaced apart from the operating handle; the limit member is slidably connected to the main body; and both ends of the connecting rod are hinged to the limit handle and the limit member respectively; The limiting handle is used to rotate relative to the main body under the action of external force, and then drive the limiting member to move away from the movable rod through the connecting rod, or approach the movable rod to engage with the movable rod to limit its movement.

8. The handle assembly according to claim 7, characterized in that: The main body is provided with a first movable groove and a second movable groove; The first movable groove is arranged around the rotation axis of the limit handle, and the first rotating shaft at the hinge between the connecting rod and the limit handle is slidably matched with the first movable groove; The second movable groove is arranged along a direction which is at an angle to the preset direction, and the second rotating shaft at the hinge between the limiting member and the connecting rod is slidably matched with the second movable groove.

9. The handle assembly according to claim 7, characterized in that: The movable rod is provided with a limiting rack, and the limiting rack is provided on a side of the movable rod facing the limiting member; The limiting member is provided with a locking tooth for engaging with the limiting rack.

10. The handle assembly according to claim 9, characterized in that: The limiting unit further comprises a limiting torsion spring sleeved on a hinge between the limiting member and the connecting rod, and the limiting torsion spring is used to make the limiting member have a tendency to rotate toward a position where the locking tooth is engaged with the limiting rack.

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