Shell assembly and surgical instrument

Abstract

The utility model relates to a shell assembly. The shell assembly comprises a first shell, a second shell and a middle buckle assembly. The top of the far-side shell is rotationally connected with the top of the second shell, so that a cavity is formed in the first shell and the second shell when the first shell and the second shell are closed. The middle buckle assembly is provided with a buckle piece and a buckle area, one of the buckle piece and the buckle area is arranged on the first shell, the other one of the buckle piece and the buckle area is arranged on the second shell, the buckle piece is provided with a groove, and the buckle area is provided with a protrusion matched with the groove. When the first shell and the second shell are closed and the protrusion is embedded into the groove, the first shell and the second shell are connected in an involution mode at the position between the top and the bottom of the shell assembly, and when the protrusion is separated from the groove, the involution connection of the first shell and the second shell is relieved. The utility model relates to a surgical instrument which comprises the shell assembly and a power unit.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of medical devices, and in particular to a housing assembly and a surgical device. BACKGROUND

[0002] With the continuous development of laparoscopic surgery, physicians usually use endoluminal cutting staplers to perform reconstruction surgery in the stomach, colorectum, etc. The electric stapler is a commonly used laparoscopic surgical device. The electric stapler mainly includes a handle part and a sleeve assembly and an end effector. The handle part includes a power element, which includes a circuit board, a battery, a motor and other electronic components, and has a high manufacturing cost. Through repeated use of the power element, the cost can be reduced. However, because it contains electronic components, it cannot be sterilized by using ethylene oxide / hot steam, which is a commonly used sterilization method, and cannot be reused in aseptic surgery. In order to reuse the power element multiple times, a housing needs to be designed to seal the power unit and form a sterile barrier to block the transmission of bacteria from the power element used multiple times out of the housing.

[0003] The existing protective housing of the electric stapler is usually formed by two parts of the housing to form an inner cavity for loading the power unit. In order to close and lock the two parts of the housing, a buckle structure is provided at a position close to the top shaft of the housing. However, such a design causes some problems in the closure of the two parts of the housing, and it is not easy to completely close and seal the housing assembly. CONTENT OF THE UTILITY MODEL

[0004] The present disclosure provides a housing assembly and a surgical device.

[0005] According to a first aspect of the present disclosure, a housing assembly is provided, which includes a first housing, a second housing and a middle buckle assembly. The top of the first housing is rotationally connected with the top of the second housing, so that when the first housing and the second housing are closed, an inner cavity is formed. The middle buckle assembly has a buckle sheet and a buckle area, one of the buckle sheet and the buckle area is provided on the first housing, and the other of the buckle sheet and the buckle area is provided on the second housing. The buckle sheet is provided with a groove, and the buckle area is provided with a protrusion matched with the groove. When the first housing and the second housing are closed and the protrusion is embedded in the groove, the first housing and the second housing are connected in a closed manner at a position between the top and the bottom of the housing assembly, and when the protrusion is separated from the groove, the first housing and the second housing are disconnected.

[0006] The shell assembly of the embodiments of the present disclosure can achieve precise positioning and closing of the first shell and the second shell. In one aspect, the shell assembly of the embodiments of the present disclosure solves the problem of invalidation of the sterile barrier due to incomplete sealing of the shell assembly in the prior art. In another aspect, the shell assembly of the embodiments of the present disclosure solves the problem of easy falling of the power unit due to instantaneous opening of the shell assembly. In another aspect, the shell assembly of the embodiments of the present disclosure solves the problem of inconvenience of unlocking of the shell assembly of the existing electric anastomat.

[0007] In one embodiment, the shell assembly comprises a cross-connection of a transverse portion and a longitudinal portion, the transverse portion comprises a top portion of the shell assembly, the longitudinal portion comprises a holding portion for holding, and the middle buckle assembly is located in the holding portion; the holding portion comprises a first holding portion of the first shell and a second holding portion of the second shell, and the buckle sheet is located in one of the first holding portion and the second holding portion, and the buckle area is located in the other of the first holding portion and the second holding portion.

[0008] In one embodiment, one of the first shell and the second shell is provided with a buckle sheet on both sides along the central axis, and the other of the first shell and the second shell is provided with a buckle area correspondingly on both sides along the central axis.

[0009] In one embodiment, one of the second shell and the first shell is provided with at least one spring plunger, each spring plunger comprises a spring and a plunger head connected with the spring, and the other of the second shell and the first shell comprises at least one abutting surface, wherein when the first shell and the second shell are closed, the spring is in a compressed state and the plunger head abuts against the abutting surface, and when the protrusion is separated from the groove, the force exerted by the spring on the plunger head pushes the abutting surface to assist in opening the first shell and the second shell.

[0010] In one embodiment, the shell assembly further comprises a bottom buckle assembly, which locks the shell assembly when the first shell and the second shell are closed.

[0011] Preferably, the rotation axes of the first shell and the second shell, the middle buckle assembly and the bottom buckle assembly are sequentially and spacedly arranged along the longitudinal direction of the shell assembly.

[0012] More preferably, the middle buckle assembly is located at a position of 1 / 2 of the distance between the top portion of the shell assembly and the bottom portion of the shell assembly.

[0013] More preferably, the middle buckle assembly is located at a position of 2 / 3 of the longitudinal portion.

[0014] The present disclosure also provides a surgical instrument, which comprises a power unit and the shell assembly in the above embodiments, and the cavity is configured to accommodate the power unit.

[0015] The examples are described in detail below with reference to the accompanying drawings. The detailed description of examples provides further appreciation of the more specific details and advantages of the examples of the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the embodiments of the present disclosure and not all the embodiments of the present disclosure.

[0017] Figure 1 is a schematic view of a housing assembly according to an embodiment of the present disclosure in an open state;

[0018] Figure 2 is a schematic view of a housing assembly according to an embodiment of the present disclosure in a closed state;

[0019] Figure 3 is Figure 2 is a sectional view of the housing assembly 100 along section line 1;

[0020] Figure 4 is a partial schematic view of a housing assembly according to an embodiment of the present disclosure in an open state to show the components of the middle snap assembly;

[0021] Figure 5 is another schematic view of a housing assembly according to an embodiment of the present disclosure in an open state to show the spring plunger;

[0022] Figure 6 is another schematic view of a housing assembly according to an embodiment of the present disclosure in an open state to show the docking face;

[0023] Figure 7A is a sectional view of a housing assembly according to an embodiment of the present disclosure in a closed state; and

[0024] Figure 7B is Figure 7A is a bottom partial enlarged view of the housing assembly to show the spring plunger. DETAILED DESCRIPTION

[0025] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative effort fall within the scope of protection of the present disclosure.

[0026] Unless otherwise defined, technical terms or scientific terms used herein shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The use of the terms "first", "second", and the like, does not imply any order or precedence, but rather are used to distinguish one element from another. The use of the terms "including", "containing", and the like, means open ended, and is not meant to exclude other elements or components. The use of the terms "connected" or "coupled" does not limit the associated device to be mechanically connected or physically attached, but can include the device being connected or coupled through a wired or wireless electrical connection, whether directly or through intervening devices. The terms "top", "bottom", "front", "back", "left", "right", "over", "under", and the like, are used only to denote relative positions for the purpose of illustration and the relative positions are subject to change as the position of the described object changes.

[0027] The terms "proximal" and "distal" are used herein with respect to a clinician manipulating the housing assembly of the surgical instrument. The term "proximal" refers to the portion closest to the clinician, and the term "distal" refers to the portion positioned away from the clinician.

[0028] Applicants have found that the positioning buckle structure of the protective housing of the existing electric anastomat is arranged on the transverse portion of the protective housing, close to the position of the top pivot of the protective housing. Such design causes problems in closing the housing assembly at the position of the hand holding portion. Once the distal housing and the proximal housing of the housing assembly expand or contract, or the operator unevenly exerts force when closing or holding the housing, the left and right hand holding portions of the two housings are misaligned, it is not easy to completely seal the housing assembly, so that the housing assembly cannot serve as a sterile barrier to block the transmission of bacteria on the power unit in the housing assembly out of the housing assembly. At the same time, since the positioning buckle structure is close to the top pivot, the power arm is short, and the operator needs more force when trying to open the protective housing. And as a result, when the housing assembly is forced open at a moment, the power unit is prone to fall. In addition, the design of the buckle piece on the proximal housing is not convenient for unlocking the housing assembly and opening the distal housing and the proximal housing.

[0029] To solve the above technical problems, the present disclosure provides a housing assembly, which comprises a distal housing, a proximal housing and a middle buckle assembly. The top of the distal housing is rotationally connected with the top of the proximal housing, so that the distal housing and the proximal housing form a cavity when closed. The middle buckle assembly has a buckle piece and a buckle area, one of which is arranged on the distal housing, and the other of which is arranged on the second housing. The buckle piece is provided with a groove, and the buckle area is provided with a protrusion matched with the groove. When the distal housing and the proximal housing are closed and the protrusion is embedded in the groove, the distal housing and the proximal housing are hingedly connected at a position between the top and the bottom of the housing assembly, and when the protrusion is disengaged from the groove, the distal housing and the proximal housing are disengaged.

[0030] The present disclosure will be described below through specific embodiments. In order to keep the following description of the embodiments of the present disclosure clear and brief, the detailed description of known functions and known components can be omitted. When any component of the embodiments of the present disclosure appears in more than one figure, the component can be denoted by the same reference numeral in each figure

[0031] Specifically, in the following embodiments, the first housing is a distal housing, and the second housing is a proximal housing. However, the first housing can be designed as a proximal housing, and the second housing can be designed as a distal housing according to actual needs. In addition, the opening and closing mode of the housing assembly is not necessarily proximal-distal opening and closing (i.e. the case where the housing assembly is composed of a proximal assembly and a distal assembly), but can also be left-right opening and closing, up-down opening and closing and other feasible two-side opening and closing, i.e. the first housing can also be one of a left-side assembly, a right-side assembly, an upper-side assembly, a lower-side assembly and a single-side assembly.

[0032] Figure 1 is a schematic view of a housing assembly 100 according to an embodiment of the present disclosure in an open state. Figure 2 is a schematic view of the housing assembly 100 according to an embodiment of the present disclosure in a closed state. As shown in Figures 1-2 , the housing assembly 100 comprises a distal housing 110 (first housing), a proximal housing 120 (second housing) and a middle buckle assembly 200. The housing assembly 100 can serve as a protective housing of a surgical instrument, and in the embodiments herein, as a sterile protective housing of a sealed power unit of an electric anastomat. As shown in Figure 2 , the top of the housing assembly 100 is marked as A, and the bottom is marked as B. The top of the distal housing 110 and the top of the proximal housing 120 are hingedly connected through a rotation shaft 130. Therefore, the distal housing 110 can rotate relative to the proximal housing 120 about the rotation shaft 130, so as to form the distal housing 110 and the proximal housing 120 in a closed state (as shown in Figure 2 ) or an open state (as shown in Figure 1two states, when the housing assembly 100 is in a locked or unlocked state, respectively. When the distal housing 110 and the proximal housing 120 are closed, a cavity (not shown) of the housing assembly 100 is formed, which can be used to accommodate a power unit that can provide power output to the performing portion of the electric anastomat. Because the interior contains electronic components such as circuit boards, batteries, etc., sterilization methods such as ethylene oxide / high-temperature steam cannot be used, and there is a problem of bacterial growth on the reusable power unit. Considering that the power unit is a reusable component, the housing assembly 100 is designed as a sterile protective housing, so that when the distal housing 110 and the proximal housing 120 are in a closed state, the housing assembly 100 is locked to form a sterile barrier, which can block the transmission of bacteria on the power unit out of the disposable housing assembly 100. In an embodiment, the material of the housing assembly 100 is hard plastic, which is disposable, easy to process and ensures the strength of the housing assembly 100. In an embodiment, the material of the housing assembly 100 is transparent, which facilitates the observation of the display screen of the power unit inside the housing assembly 100, and shows the working condition of the anastomat to the operator.

[0033] Figure 3 is Figure 2 a cross-sectional view of the housing assembly 100 along the section line 1, wherein Y-Y is the central axis of the housing assembly 100, Figure 4 is a partial schematic view of the housing assembly 100 in an open state according to an embodiment of the present disclosure, to show the composition of the middle buckle assembly 200. In combination with Figure 1 , Figure 2 and Figure 4 , the middle buckle assembly 200 includes a buckle sheet 210 and a buckle area 220 corresponding to the buckle sheet 210. As shown in Figure 2 , the middle is a region near the middle of the top A and the bottom B. The buckle sheet 210 is provided on the distal housing 110, and the buckle sheet 210 is provided with a groove 212, wherein the groove includes a through hole. In an embodiment, the middle position of the buckle sheet 210 is provided with the groove 212, so as to better buckle the housing assembly 100. The buckle area 220 is provided on the proximal housing 120, and the buckle area 220 is provided with a protrusion 222, which is adapted to the groove 212. In an embodiment, according to actual needs, the buckle sheet 210 is provided on the proximal housing 120, and the buckle area 220 is provided on the distal housing 110. When the distal housing 110 and the proximal housing 120 are closed and the protrusion 222 is embedded in the groove 212, the housing assembly 100 is weakly locked (as shown in Figure 2 ), specifically, the distal housing 110 and the proximal housing 120 are connected in abutment at a position between the top A and the bottom B of the housing assembly. When the protrusion 222 is disengaged from the groove 212, the weak locking of the housing assembly 100 is released (as shown in Figure 1In particular, the distal shell is disengaged from the proximal shell. The middle snap assembly 200 has a certain holding force after the shell assembly 100 is weakly locked, so that a certain resistance needs to be overcome before the shell assembly 100 can be unlocked. In addition, referring to Figure 3 , Figure 3 is Figure 2 is a cross-sectional view of the shell assembly 100 along the section line 1, in particular, the cross-sectional view is a bottom view, so that the connection relationship between the snap piece 210 and the snap area 220 when the shell assembly 100 is in a closed state can be more clearly seen. As can be seen from Figure 3 , the snap piece 120 extends to wrap around the proximal shell 120, so that the snap piece 120 is tightly attached to the snap area 220 and the protrusion 222 is embedded in the groove 212, and the shell assembly 100 is weakly locked. The middle snap assembly 200 according to the embodiment of the present disclosure provides accurate guidance during the closing of the distal shell 110 and the proximal shell 120, and at the same time provides a certain locking effect for the shell assembly. The number of middle snap assemblies 200 can be set according to actual needs, and in one embodiment, the number of middle snap assemblies 200 is two, in particular, one snap piece 210 is arranged on each side of the distal shell 110 along the center axis Y-Y, and one snap area 220 is arranged on each side of the proximal shell 120 along the center axis Y-Y. The snap piece 210 corresponds to the snap area 220 one by one. When the distal shell 110 and the proximal shell 120 are closed and the protrusions 222 on both sides are respectively embedded in the corresponding grooves 212, the shell assembly 100 is better locked. In one embodiment, when the protrusion 222 is embedded in the groove 212, the snap piece 210 is wrapped on the snap area 220, so that the contact between the snap piece 210 and the snap area 220 is more complete, and in turn the shell assembly 100 forms a tight engagement connection. In one embodiment, as shown in Figure 4As shown, the snap region 220 is configured as a recess 126, which is sized to match the size of the snap tab 210, such that when the protrusion 222 is embedded into the groove 212, the snap region 220 better fits with the snap tab 210, thereby making the closure connection of the housing assembly 100 more secure. As mentioned above, in the existing powered stapler, the snap tab 210 is designed on the proximal housing 120, which is inconvenient for the operator to unlock the housing assembly 100 and open the distal housing 110 and the proximal housing 120. Typically, when the operator needs to unlock the housing assembly 100 to replace the power unit, one hand holds the proximal housing 120 and the other hand unlocks the middle snap assembly 200. Specifically, the unlocking operation is to push the snap tab 210 so that the groove 212 of the snap tab 210 is disengaged from the protrusion 222 on the snap region 220. However, since the snap tab 210 is designed on the proximal housing 120, the operator needs to push the snap tab 210 of the proximal housing 120 and turn the distal housing 110 to open the unlocked housing assembly 100, which is inconvenient. According to the housing assembly 100 of the present disclosure, the snap tab 210 is designed on the distal housing 110, so that the operator only needs to perform the unlocking operation on the distal housing 110, thereby solving the problem of the existing powered stapler that the housing assembly 100 is inconvenient to unlock.

[0034] Reference Figure 1 , Figure 5 and Figure 6 In one embodiment, the housing assembly 100 further comprises a bottom snap assembly 300, so that the housing assembly 100 is locked when the distal housing 110 and the proximal housing 120 are closed. By designing the bottom snap assembly 300 on the housing assembly 100, the distal housing 110 and the proximal housing 120 are better closed, thereby providing a secure locking effect to the housing assembly 100. The bottom snap assembly is used in combination with the above-mentioned middle snap assembly to better achieve the locking of the housing assembly.

[0035] Preferably, the bottom snap assembly 300 comprises a bottom snap rib 310 arranged on the distal housing 110 and a bottom snap spring 320 arranged on the proximal housing 120, which are snap-connected to lock the housing assembly 100 when the distal housing 110 and the proximal housing 120 are closed.

[0036] Again referring to Figure 1 and Figure 2The housing assembly 100 includes a cross-connected transverse portion 100a and a longitudinal portion 100b, wherein the transverse portion 100a includes the top of the housing assembly 100, and the longitudinal portion 100b includes a grip portion 100c for gripping, wherein the grip portion 100c includes a distal grip portion (first grip portion) 110c located at the distal housing 110 and a proximal grip portion 120c (second grip portion) located at the proximal housing 120. In one embodiment, the middle buckle assembly 200 is located at the grip portion 100c of the housing assembly 100, the buckle piece 210 is located at the distal grip portion 110c of the distal housing 110, and the buckle area 220 is located at the distal grip portion 110c of the proximal housing 120 (e.g., Figure 1 As shown). As mentioned above, the positioning buckle structure of the existing electric stapler is set on the non-holding part close to the top rotating shaft. For example, the positioning buckle structure is set on the transverse part 100a, which is not easy to completely seal the shell assembly 100. The bacteria on the power unit will be transmitted out of the shell assembly 100, thereby affecting the health of the patient in surgery; at the same time, the power unit is easily caused to fall due to the instantaneous forceful opening of the shell assembly 100, seriously affecting the normal progress of the surgery. According to the embodiment of the present disclosure, the middle buckle assembly 200 is set on the holding part 100c of the shell assembly 100, so as to achieve precise positioning and closure of the distal shell 110 and the proximal shell 120 and ensure a more complete sealing of the shell assembly 100. In addition, the middle buckle assembly 200 is set on the holding part 100c of the shell assembly 100, which is located in the middle position between the rotating shaft 130 and the bottom buckle assembly 300. The rotating shaft 130, the middle buckle assembly 200 and the bottom buckle assembly 300 are arranged along the longitudinal direction of the shell assembly 100 (see Figure 2 In a preferred embodiment, the middle snap assembly is located at 2 / 3 of the longitudinal portion, that is, the distance between the middle snap assembly and the top A is about twice the distance between the middle snap assembly and the bottom B, so that the middle snap assembly has a better holding force after the shell assembly 100 is weakly locked. In a preferred embodiment, the rotating shaft 130, the middle snap assembly 200 and the bottom snap assembly 300 are relatively evenly distributed along the longitudinal direction of the shell assembly 100. In other words, the middle snap assembly 200 is located at 1 / 2 of the distance between the top A of the shell assembly 100 and the bottom B of the shell assembly 100 (as shown in FIG. Figure 1 As shown in FIG, when the middle snap assembly 200 is closed between the distal housing 110 and the proximal housing 120, a uniform sealing position is achieved, effectively limiting the left-right swing of the distal housing 110 and the proximal housing 120. It should be noted that "left-right swing" refers to the left-right misalignment of the distal housing and the proximal housing caused by assembly clearance during installation.

[0037] Figure 5is another schematic view of the housing assembly 100 in the open state according to an embodiment of the present disclosure to show the spring plungers 122. Figure 6 is another schematic view of the housing assembly 100 in the open state according to an embodiment of the present disclosure to show the docking surfaces 112. Figure 7A is a cross-sectional view of the housing assembly 100 in the closed state according to an embodiment of the present disclosure. Figure 7B is Figure 7A is a bottom partial enlarged view of the housing assembly 100 to show the spring plungers 122. In one embodiment, the proximal housing 120 is provided with at least one spring plunger 122, each spring plunger 122 comprising a spring 1222 and a plunger head 1224 connected with the spring 1222, and the distal housing 110 comprises at least one docking surface 112. Preferably, a plurality of spring plungers 122 can be provided at the bottom of the proximal housing 120, as shown in Figure 5 It is to be noted that at least one spring plunger can be provided on the distal housing and at least one docking surface can be comprised on the proximal housing according to actual needs. When the distal housing 110 and the proximal housing 120 are closed, the spring 1222 is in a compressed state and the plunger head 1224 abuts against the docking surface 112 of the distal housing 110. Specifically, after the spring plunger 122 contacts the docking surface 112, the plunger head 1224 is pushed back into the plunger hole 124 of the spring plunger 122 under the abutting force of the docking surface 112, so that the spring plunger 122 is completely inserted into the plunger hole 124 when the distal housing 110 and the proximal housing 120 are closed, as shown in Figure 7B When the operator unlocks the housing assembly 100, opens the bottom buckle assembly 300, and opens the middle buckle assembly 200, the protrusion 222 is disengaged from the groove 212, the force exerted by the spring 1222 on the plunger head 1224 pushes the docking surface to assist in opening the distal housing 110 and the proximal housing 120 by a small distance, and then the distal housing 110 and the proximal housing are completely opened under the external force of the operator. In a preferred embodiment, the proximal housing 120 is provided with a pair of spring plungers 122, and the pair of spring plungers 122 are located on both sides of the proximal housing 120. Such a design facilitates better and faster opening of the housing assembly 100 after unlocking. By providing the spring plungers 122 on the proximal housing 120, the operation of opening the housing assembly 100 is automatically completed without the need to pull the proximal housing 120 and the distal housing 110, which makes it more labor-saving and convenient to disassemble the housing assembly 100. The plurality of spring plungers 122 are provided in the cavity at the bottom of the housing assembly 100, so that the spring 1222 exerts a greater force on the plunger head 1224 to push the distal housing 110 to open.

[0038] The present disclosure also relates to a surgical instrument comprising the housing assembly of any of the above embodiments. In one embodiment, the surgical instrument further comprises a power unit (not shown), and the cavity is configured to accommodate the power unit, as described above.

[0039] The middle buckle assembly of the housing assembly of the embodiments of the present disclosure is located between the top and the bottom of the housing assembly and close to the middle position, and a uniform sealing site is obtained when the middle buckle assembly is closed after the distal housing and the proximal housing, effectively limiting the left and right direction swing of the distal housing and the proximal housing. When the bottom buckle assembly is opened, the middle buckle assembly arranged at this position is beneficial to the distal housing and the proximal housing still being kept together, and the power unit is blocked in the cavity. The operator needs to exert a little more force to open the distal housing and the proximal housing to release the middle buckle assembly, and then the power unit can be taken out, preventing the power unit from directly falling after the bottom buckle assembly is opened. At the same time, since the middle buckle assembly is away from the rotation shaft at a certain distance, the force arm is longer, and the force required by the operator to open the distal housing and the proximal housing is not too large, which improves the practicability and avoids the risk of the power unit falling during the process of the operator opening with force. The middle buckle assembly is arranged in the longitudinal part of the housing assembly, thereby realizing the accurate positioning and closing of the distal housing and the proximal housing and ensuring that the sealing of the housing assembly is more complete. The plurality of spring plungers are arranged at the bottom of the housing assembly, so that the spring exerts greater force on the head to push the distal housing.

[0040] Although examples of the present disclosure are provided in the foregoing description, those skilled in the art can modify and change the examples without departing from the scope and spirit of the present disclosure. For example, it should be understood that the features of the embodiments herein can be applicable to other embodiments described herein. Therefore, the description is intended to be illustrative rather than restrictive. The disclosure is defined by the appended claims, and all changes to the disclosure that fall within the meaning and range of equivalents of the claims will be included in their scope.

Claims

1. A housing assembly, characterized by The housing assembly comprises: a first housing; a second housing, a top of the first housing being rotatably connected to a top of the second housing, such that the first housing and the second housing form a cavity when closed; and a middle snap assembly having a snap tab and a snap area, one of the snap tab and the snap area being provided on the first housing and the other of the snap tab and the snap area being provided on the second housing, the snap tab being provided with a groove, the snap area being provided with a protrusion adapted to the groove, when the first housing and the second housing are closed and the protrusion is embedded in the groove, the first housing and the second housing are hingedly connected at a position between a top and a bottom of the housing assembly, and when the protrusion is disengaged from the groove, the first housing and the second housing are disengaged from the hinged connection.

2. The housing assembly of claim 1, wherein the housing assembly comprises a transverse portion and a longitudinal portion, the transverse portion comprising a top of the housing assembly, the longitudinal portion comprising a gripping portion for gripping, the middle snap assembly being located at the gripping portion; the gripping portion comprises a first gripping portion located at the first housing and a second gripping portion located at the second housing, the snap tab being located at one of the first gripping portion and the second gripping portion, the snap area being located at the other of the first gripping portion and the second gripping portion.

3. The housing assembly of claim 1, wherein, one of the first housing and the second housing is provided with a snap tab on both sides along a central axis, and the other of the first housing and the second housing is correspondingly provided with a snap area on both sides along the central axis.

4. The housing assembly of claim 1, wherein one of the second housing and the first housing is provided with at least one spring plunger, each of the spring plungers comprising a spring and a plunger head connected to the spring, the other of the second housing and the first housing comprises at least one abutting surface, wherein when the first housing and the second housing are closed, the spring is in a compressed state and the plunger head abuts against the abutting surface, and when the protrusion is disengaged from the groove, the force exerted by the spring on the plunger head pushes the abutting surface to assist in opening the first housing and the second housing.

5. The housing assembly of claim 1, wherein, a bottom snap assembly is further included, the bottom snap assembly locking the housing assembly when the first housing and the second housing are closed.

6. The housing assembly of claim 5, wherein, the rotation axis of the first housing and the second housing, the middle snap assembly and the bottom snap assembly are sequentially and spacedly arranged along a longitudinal direction of the housing assembly.

7. The housing assembly of claim 6, wherein, the middle snap assembly is located at a position of 1 / 2 of a distance between the top of the housing assembly and the bottom of the housing assembly.

8. The housing assembly of claim 2, wherein, the middle snap assembly is located at a position of 2 / 3 of the longitudinal portion.

9. A surgical instrument comprising a power unit, characterized in that the surgical instrument comprises the housing assembly according to any one of claims 1-8, the cavity being configured to accommodate the power unit.

Images