Handle assembly

Abstract

The utility model discloses a handle assembly which comprises an upper shell (501), a lower shell (502), an upper conversion clutch handle (503) and a lower conversion clutch handle (505), the upper shell (501) and the lower shell (502) are fixed together to form a shell cavity, and the upper conversion clutch handle (503) and the lower conversion clutch handle (504) are connected outside the shell cavity in a sleeved mode and fixed to form a handle cavity. The device is characterized in that the up-conversion clutch handle (503) comprises a first locking mechanism, the down-conversion clutch handle (505) comprises a second locking mechanism, and the first locking mechanism and the second locking mechanism are used for locking the handle cavity. According to the limiting structure, the handle is effectively prevented from being shifted due to maloperation, and the structural stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a handle assembly for a laparoscopic stapler. Background Art

[0002] In recent years, minimally invasive surgery in China has developed rapidly, and laparoscopic staplers play an important role in minimally invasive surgery. During abdominal minimally invasive surgery, a laparoscopic stapler with more delicate performance and structure is required to achieve tissue cutting and suturing.

[0003] A stapler usually needs to clamp tissue first and then fire to cut the tissue. Clamping tissue and cutting tissue need to be achieved through two transmission structures. Therefore, a clutch shift handle needs to be added to the housing of the stapler, and the switching of the two transmission structures is achieved by controlling the position of the clutch shift handle. Since the clutch shift handle is outside the housing, it is easy to be accidentally touched, resulting in incorrect switching of the transmission structure, which is a technical problem that needs to be solved. Therefore, it is urgent to develop a clutch shift handle with a limit function and better performance. This patent introduces a handle assembly for a laparoscopic stapler. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to solve the technical problem that the handle assembly in the prior art is easy to be accidentally touched, resulting in operation errors.

[0005] To solve the above technical problem, the technical solution provided by the utility model is as follows:

[0006] A handle assembly includes an upper housing (501), a lower housing (502), an upper conversion clutch handle (503) and a lower conversion clutch handle (505). The upper housing (501) and the lower housing (502) are fixed together to form a housing cavity. The upper conversion clutch handle (503) and the lower conversion clutch handle (505) are sleeved outside the housing cavity and fixed to form a handle cavity. The feature is that the upper conversion clutch handle (503) includes a first locking mechanism, and the lower conversion clutch handle (505) includes a second locking mechanism. The first locking mechanism and the second locking mechanism are used to lock the handle cavity.

[0007] Further, the first locking mechanism includes a first positioning block (5031). The upper surface of the first positioning block (5031) is provided with a first limiting groove (5033). The first locking mechanism further includes a first elastic member. The first elastic member is installed in the first limiting groove (5033), and a part of the first elastic member protrudes outside the first limiting groove (5033).

[0008] Further, the number of the first limiting grooves (5033) is 4; the first elastic member is 2 first elastic pieces.

[0009] Further, the first elastic piece is a V-shaped elastic piece. Two ends of the first elastic piece respectively extend into the first limiting groove (5033), and the V-shaped structure of the first elastic piece protrudes from the first positioning block (5031).

[0010] Further, the second locking mechanism includes a second positioning block (5051). A second limiting groove (5053) is provided on the upper surface of the second positioning block (5051). The second locking mechanism further includes a second elastic member. The second elastic member is installed in the second limiting groove (5053), and a part of the second elastic member protrudes out of the second limiting groove (5053).

[0011] Further, there are 4 second limiting grooves (5053); the second elastic member is 2 second elastic pieces.

[0012] Further, the second elastic piece is a V-shaped elastic piece. Two ends of the second elastic piece respectively extend into the second limiting groove (5053), and the V-shaped structure of the second elastic piece protrudes from the second positioning block (5051).

[0013] Further, the upper housing (501) is provided with a third limiting groove (5017). The first positioning block (5031) of the upper conversion clutch handle (503) axially moves in the third limiting groove (5017); the lower housing (502) is provided with a fourth limiting groove (5027). The second positioning block (5051) of the lower conversion clutch handle (505) axially moves in the fourth limiting groove (5027).

[0014] Further, 2 first limiting protrusions (5018) are respectively provided on both sides of the track of the third limiting groove (5017) of the upper housing (501), and 2 second limiting protrusions (5028) are respectively provided on both sides of the track of the fourth limiting groove (5027) of the lower housing (502).

[0015] Further, the upper housing (501) is further provided with a first travel groove (5016). The lower housing (502) correspondingly is provided with a second travel groove (5026). The interiors of the upper housing (501) and the lower housing (502) contain 2 switching brackets (115). The 2 switching brackets (115) are respectively provided with fifth positioning struts (1154). The fifth positioning struts (1154) respectively protrude into the first travel groove (5016) of the upper housing (501) and the second travel groove (5026) of the lower housing (502).

[0016] After adopting such a design, the present utility model has at least the following advantages:

[0017] (1) The limit structure of the present utility model effectively prevents the handle from being accidentally moved, resulting in position conversion, and improves the structural stability.

[0018] (2) In the present utility model, the first locking mechanism and the second locking mechanism enable the handle cavity to be in the initial position and the terminal position. Through the action of the elastic member and the groove, the conversion clutch handle will not easily slide.

[0019] (3) The structure of the present utility model is simple, has good effects, low cost, and is easy to be realized by technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above is only an overview of the technical solution of the present utility model. In order to understand the technical means of the present utility model more clearly, the following provides a further detailed description of the present utility model in combination with the drawings and the specific embodiments.

[0021] Figure 1 is a schematic structural view of the upper housing 501 of an embodiment of the present utility model;

[0022] Figure 2 is a schematic structural view of the lower housing 502 of an embodiment of the present utility model;

[0023] Figure 3 is a schematic structural view of the upper conversion clutch handle 503 of an embodiment of the present utility model;

[0024] Figure 4 is a schematic structural view of the lower conversion clutch handle 505 of an embodiment of the present utility model;

[0025] Figure 5 is a schematic structural view of the position conversion bracket 115 of an embodiment of the present utility model;

[0026] Reference numerals,

[0027] upper housing 501, lower housing 502, upper conversion clutch handle 503, elastic sheet 504, lower conversion clutch handle 505, first positioning hole 5011, second positioning pillar 5012, first stroke groove 5016, third limit groove 5017, first limit protrusion 5018, first positioning pillar 5021, third positioning pillar 5022, second stroke groove 5026, fourth limit groove 5027, second limit protrusion 5028, first positioning block 5031, third positioning hole 5032, first limit groove 5033, second positioning block 5051, fourth positioning hole 5052, second limit groove 5053, position conversion bracket 115, fourth positioning pillar 1152, second positioning hole 1153, fifth positioning pillar 1154; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] In this article, "upper", "lower", etc. are only used to represent the relative positional relationship between relevant parts, rather than limiting the absolute positions of these relevant parts.

[0030] One end of each of the following components close to the operator is defined as the proximal end, and the end far from the operator is defined as the distal end. The expressions of the proximal end and the distal end are only used to make the description simple and clear, and should not be construed as any limitation to the present utility model.

[0031] As Figures 1-5 shown, the handle assembly of an embodiment of the present utility model includes an upper housing 501, a lower housing 502, an upper conversion clutch handle 503, and a lower conversion clutch handle 505. The upper housing 501 and the lower housing 502 are fixed together to form a housing cavity. The upper conversion clutch handle 503 and the lower conversion clutch handle 505 are sleeved outside the housing cavity and fixed to form a handle cavity. The upper conversion clutch handle 503 includes a first locking mechanism, and the lower conversion clutch handle 505 includes a second locking mechanism. The first locking mechanism and the second locking mechanism are used to prevent the handle cavity from sliding easily when it is in the initial position and the termination position, so as to prevent misoperation by the user.

[0032] Preferably, in order to fix the upper housing 501 and the lower housing 502, ultrasonic welding is used to fix them to form a cavity; in order to fix the upper conversion clutch handle 503 and the lower conversion clutch handle 505, ultrasonic welding is used to fix them to form a cavity;

[0033] Here, the first locking mechanism and the second locking mechanism included in the upper conversion clutch handle 503 and the lower conversion clutch handle 505 may adopt the same structure. In some embodiments of the present application, for the sake of distinction, the first locking mechanism and the second locking mechanism may be of different structures.

[0034] The upper housing 501 is provided with a first positioning hole 5011, and the lower housing 502 correspondingly has a first positioning pillar 5021. The first positioning pillar 5021 is inserted into the first positioning hole 5011, and the two are matched and fixed together by ultrasonic welding, so that the upper housing 501 and the lower housing 502 are fixed together; and the transmission component and the clutch conversion component of the stapler are also fixed inside the upper housing 501 and the lower housing 502.

[0035] The upper housing 501 is further provided with a second positioning pillar 5012, and the lower housing 502 is correspondingly provided with a third positioning pillar 5022. The transmission component is correspondingly provided with a second positioning hole and a third positioning hole. The fastening of the pillar and the hole further enhances the stability between the transmission component and the upper and lower housings; on the inner wall of the distal end of the upper conversion clutch handle 503, a first locking mechanism is provided. The first locking mechanism includes a first positioning block 5031. The first positioning block 5031 is inserted into the third limiting groove 5017 of the upper housing 501. On the inner wall of the distal end of the lower conversion clutch handle 505, a second locking mechanism is correspondingly provided. The second locking mechanism includes a second positioning block 5051. The second positioning block 5051 is inserted into the fourth limiting groove 5027 of the lower housing 502. When the handle cavity is pushed, the first positioning block 5031 of the upper conversion clutch handle 503 and the second positioning block 5051 of the lower conversion clutch handle 505 respectively perform axial movement and slip in the third limiting groove 5017 of the upper housing 501 and the fourth limiting groove 5027 of the lower housing 502.

[0036] Here, the first positioning block 5031 and the second positioning block 5051 have the same structure, and the third limiting groove 5017 and the fourth limiting groove 5027 have the same structure.

[0037] The upper conversion clutch handle 503 is further provided with a first limiting groove 5033. The locking mechanism further includes a first elastic member. The first elastic member is installed in the first limiting groove 5033, and a part of the first elastic member protrudes from the first limiting groove 5033. After the first elastic member is installed, the first elastic member is pressed into the first limiting groove 5033 so that the first elastic member protrudes from both sides of the first positioning block 5031 of the upper conversion clutch handle 503.

[0038] The lower conversion clutch handle 505 is further provided with a second limiting groove 5053. The locking mechanism further includes a second elastic member. The second elastic member is installed in the second limiting groove 5053, and a part of the second elastic member protrudes from the second limiting groove 5053. After the second elastic member is installed, the second elastic member is pressed into the second limiting groove 5053 so that the second elastic member protrudes from both sides of the second positioning block 5051 of the lower conversion clutch handle 505; preferably, the first elastic member and the second elastic member are respectively elastic sheets 504. The elastic sheet 504 is V-shaped. The two ends of the elastic sheet 504 in the upper conversion clutch handle 503 respectively extend into 2 first limiting grooves 5033, and the V-shaped structure of the elastic sheet 504 protrudes from the first positioning block 5031; the two ends of the elastic sheet 504 in the lower conversion clutch handle 505 respectively extend into 2 second limiting grooves 5053, and the V-shaped structure of the elastic sheet 504 protrudes from the second positioning block 5051.

[0039] The first positioning block 5031 is provided with 4 first limiting grooves 5033 and 2 elastic pieces 504. Each elastic piece 504 occupies 2 first limiting grooves 5033. 2 first limiting grooves 5033 form a group, and the first positioning block 5031 is symmetrically provided with 2 groups. The length of the first limiting groove 5033 of the upper conversion clutch handle 503 is greater than the length of the elastic leg of the elastic piece 504, so that the elastic piece 504 can extend along the first limiting groove 5033 after being pressed;

[0040] The second positioning block 5051 is provided with 4 second limiting grooves 5053 and 2 elastic pieces 504. Each elastic piece 504 occupies 2 second limiting grooves 5053. 2 second limiting grooves 5053 form a group, and the second positioning block 5051 is symmetrically provided with 2 groups. The length of the second limiting groove 5053 of the lower conversion clutch handle 505 is greater than the length of the elastic leg of the elastic piece 504, so that the elastic piece 504 can extend along the second limiting groove 5053 after being pressed;

[0041] On both sides of the track of the third limiting groove 5017 of the upper housing 501, 2 first limiting protrusions 5018 are respectively provided. On both sides of the track of the fourth limiting groove 5027 of the lower housing 502, 2 second limiting protrusions 5028 are respectively provided. The side walls of the third limiting groove 5017 press the V-shaped structure of the elastic piece 504, that is: press the part of the elastic piece protruding from the first positioning block 5031. The elastic piece 504 has the material property of high elasticity and being resetable. After the pressure is removed, the elastic piece 504 returns to the initial position. The side walls of the fourth limiting groove 5027 press the V-shaped structure of the elastic piece 504, that is: press the part of the elastic piece protruding from the second positioning block 5051. The elastic piece 504 has the material property of high elasticity and being resetable. After the pressure is removed, the elastic piece 504 returns to the initial position; The transmission component of the stapler includes a transposition bracket 115. There are 2 transposition brackets 115, namely the upper transposition bracket and the lower transposition bracket. Taking one of them as an example, at both ends of a transposition bracket 115, a fourth positioning pillar 1152 and a second positioning hole 1153 are provided. The other transposition bracket is correspondingly provided with a positioning hole and a positioning pillar. The two transposition brackets 115 are fixedly installed together by installing the positioning pillar and the positioning hole. The two transposition brackets 115 are installed inside the upper housing 501 and the lower housing 502.

[0042] The upper housing 501 is further provided with a first stroke groove 5016, and the lower housing 502 is correspondingly provided with a second stroke groove 5026. On the transposition bracket 115, a fifth positioning pillar 1154 is provided. The fifth positioning pillar 1154 protrudes from the first stroke groove 5016 of the upper housing 501. Similarly, the other transposition bracket also correspondingly includes a positioning pillar, and this positioning pillar protrudes into the second stroke groove 5026 of the lower housing 502;

[0043] Taking the second stroke groove 5026 of the following housing 502 as an example for introduction, the positioning pillar 1154 of the clutch shifting bracket 115 protrudes from the second stroke groove 5026 of the lower housing 502. A third positioning hole 5032 is provided on the first positioning block 5031. The positioning pillar 1154 on the clutch shifting bracket 115 is inserted into the third positioning hole 5032, so that the upper conversion clutch handle 503 is locked with the clutch shifting bracket 115. A fourth positioning hole 5052 is provided on the second positioning block 5051, so that the lower conversion clutch handle 505 is locked with the clutch shifting bracket 115.

[0044] Specifically, when pushing the handle cavity, due to the existence of the first positioning protrusion 5031 and the second positioning protrusion 5051, the handle cavity makes an axial movement.

[0045] When the handle cavity is locked with the clutch shifting bracket 115, the elastic pieces 504 on both sides of the first positioning block 5031 protruding from the upper conversion clutch handle 503 are stuck in the first limiting protrusion 5018, and the elastic pieces 504 on both sides of the second positioning block 5051 protruding from the lower conversion clutch handle 505 are stuck in the second limiting protrusion 5028. Without applying force, the handle cavity will not accidentally touch and shift positions.

[0046] In the embodiment of the present invention, the third limiting groove 5017 cooperates with the first positioning block 5031 of the upper conversion clutch handle 503, and the fourth limiting groove 5027 cooperates with the second positioning block 5031 of the lower conversion clutch handle 505, so that the handle cavity makes an axial movement on the upper housing 501 and the lower housing 502 and limits the stroke.

[0047] When the elastic pieces 504 on both sides of the first positioning block 5031 protruding from the upper conversion clutch handle 503 are stuck in the first limiting protrusion 5018 at the distal end, and the elastic pieces 504 on both sides of the second positioning block 5051 protruding from the lower conversion clutch handle 505 are stuck in the second limiting protrusion 5028 at the distal end, a certain force for shifting position is provided for the switching of the transmission position.

[0048] The elastic pieces 504 are respectively pressed into the first limiting groove 5033 of the upper conversion clutch handle 503 and the second limiting groove 5053 of the lower conversion clutch handle 505. Since the depths of the first limiting groove 5033 and the second limiting groove 5053 are both greater than the length of the elastic piece 504, by squeezing the elastic piece 504 forcefully, the elastic piece 504 can be completely pressed into the first positioning block 5031 and the second positioning block 5051.

[0049] In the initial state, the inverted V-shaped part of the elastic piece 504 of the first locking mechanism of the upper housing 501 is located at the first limiting protrusion 5018, and the inverted V-shaped part of the elastic piece 504 of the second locking mechanism of the lower housing 502 is located at the second limiting protrusion 5028. Here, there are 2 elastic pieces 504 in the upper housing 501 and 2 elastic pieces 504 in the lower housing 502. The elastic pieces of each housing are arranged correspondingly and have the same function.

[0050] When the handle cavity is pushed forcefully, due to the elastic force of the elastic piece 504, the inverted V-shaped part of the elastic piece 504 is squeezed by the handle cavity. The two elastic feet of the elastic piece 504 of the upper housing 501 will extend along the track of the third limiting groove 5017 towards the end, and the two elastic feet of the elastic piece 504 of the lower housing 502 will extend along the track of the fourth limiting groove 5027 towards the end, causing the handle cavity to move forward until each group of elastic pieces 504 respectively encounters the next limiting protrusion, that is: the inverted V-shaped part of the elastic piece 504 of the locking mechanism of the upper housing 501 encounters the second first limiting protrusion 5018, and the inverted V-shaped part of the elastic piece 504 of the locking mechanism of the lower housing 502 encounters the second second limiting protrusion 5028. After losing the pressure, the elastic piece 504 returns to the initial position, thereby locking the handle cavity and making the handle cavity unable to move further, completing the conversion from the first transmission position to the second transmission position.

[0051] After adopting such a design, the present utility model has at least the following advantages:

[0052] (1) The limiting structure of the present utility model effectively prevents the handle from being accidentally moved to cause position conversion, and improves the structural stability.

[0053] (2) The first locking mechanism and the second locking mechanism of the present utility model make the handle cavity not easily slide when it is in the initial position and the terminal position through the action of the elastic member and the groove.

[0054] (3) The structure of the present utility model is simple, has good effects, low cost, and is easy to be realized by technology.

[0055] After considering the utility model disclosed in the specification and the embodiments, those skilled in the art will easily think of other implementation schemes of the present utility model. This application aims to cover any variations, uses or adaptive changes of the present utility model. These variations, uses or adaptive changes follow the general principles of the present utility model and include the well-known common knowledge or conventional technical means in the technical field not disclosed in the present utility model. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the present utility model are pointed out by the following claims.

[0056] It should be understood that the present utility model is not limited to the exact structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present utility model is only limited by the appended claims.

Claims

1. A handle assembly, comprising an upper shell (501), a lower shell (502), an upper conversion clutch handle (503) and a lower conversion clutch handle (505), wherein the upper shell (501) and the lower shell (502) are fixed together to form a shell cavity, and the upper conversion clutch handle (503) and the lower conversion clutch handle (505) are sleeved outside the shell cavity and fixed to form a handle cavity, characterized in that: The upper conversion clutch handle (503) includes a first locking mechanism, and the lower conversion clutch handle (505) includes a second locking mechanism. The first locking mechanism and the second locking mechanism are used to lock the handle cavity.

2. The handle assembly according to claim 1, wherein: The first locking mechanism includes a first positioning block (5031), the upper surface of which is provided with a first limiting groove (5033), and the first locking mechanism also includes a first elastic member, which is installed in the first limiting groove (5033), and the first elastic member partially protrudes outside the first limiting groove (5033).

3. The handle assembly according to claim 2, wherein: There are four first limiting grooves (5033); and the first elastic member is two first elastic sheets.

4. The handle assembly according to claim 3, wherein: The first spring piece is a V-shaped spring piece, and the two ends of the first spring piece extend into the first limiting groove (5033) respectively, and the V-shaped structure of the first spring piece protrudes from the first positioning block (5031).

5. The handle assembly according to claim 4, wherein: The second locking mechanism includes a second positioning block (5051), the upper surface of which is provided with a second limiting groove (5053), and the second locking mechanism also includes a second elastic member, which is installed in the second limiting groove (5053), and the second elastic member partially protrudes outside the second limiting groove (5053).

6. The handle assembly according to claim 5, wherein: There are four second limiting grooves (5053); and the second elastic member is two second elastic sheets.

7. The handle assembly according to claim 6, wherein: The second spring piece is a V-shaped spring piece, and the two ends of the second spring piece extend into the second limiting groove (5053) respectively, and the V-shaped structure of the second spring piece protrudes from the second positioning block (5051).

8. The handle assembly according to claim 7, wherein: The upper shell (501) is provided with a third limiting groove (5017), and the first positioning block (5031) of the upper conversion clutch handle (503) moves axially in the third limiting groove (5017); the lower shell (502) is provided with a fourth limiting groove (5027), and the second positioning block (5051) of the lower conversion clutch handle (505) moves axially in the fourth limiting groove (5027).

9. The handle assembly according to claim 8, wherein: Two first limiting protrusions (5018) are respectively provided on both sides of the track of the third limiting slot (5017) of the upper shell (501), and two second limiting protrusions (5028) are respectively provided on both sides of the track of the fourth limiting slot (5027) of the lower shell (502).

10. The handle assembly according to claim 9, wherein: The upper shell (501) is also provided with a first travel groove (5016), and the lower shell (502) is correspondingly provided with a second travel groove (5026). The interior of the upper shell (501) and the lower shell (502) contains two transposition brackets (115) installed together, and the two transposition brackets (115) are respectively provided with a fifth positioning pillar (1154), and the fifth positioning pillar (1154) protrudes from the first travel groove (5016) of the upper shell (501) and the second travel groove (5026) of the lower shell (502).

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