High-protection socket and endoscope system
By incorporating a stop structure into the endoscope system, the problem of the plug and socket tilting during repeated insertion and removal is solved, achieving improved reliability and waterproof performance, and meeting the IP67 protection rating.
Patent Information
- Application Number
- CN202423120942.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-17
AI Technical Summary
In existing endoscope systems, the interfaces of plugs and sockets are prone to misalignment during repeated plugging and unplugging, causing the slots to lift up and resulting in poor connection. This makes it difficult to meet the requirements for high reliability, waterproof performance, and mechanical interlocking.
A stop structure is provided on the side of the plug housing facing away from the main circuit board. The stop structure and the main circuit board form a solid connection to prevent the electrical connector protrusion from tilting up, ensuring good insertion of the electrical connector protrusion and the electrical connector slot. It also forms a shield on the outside to improve waterproof, dustproof and shielding performance.
It effectively prevents the connector housing from warping, ensures the stability and reliability of electrical connections, improves waterproof and dustproof performance during insertion and removal, and meets IP67 protection requirements.
Smart Images

Figure CN223665732U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to endoscope technical field, concretely relates to a high protection socket and endoscope system. BACKGROUND
[0002] The existing electronic endoscope system inevitably needs to use the plug and the socket, for example, the plug and the socket are used to realize the connection between the endoscope and the host computer / light source system of the electronic endoscope. In the electronic endoscope system, the interface of the plug and the socket requires high reliability, good shielding performance and good waterproof performance. In addition, the plug and the socket also have certain requirements on the service life, for example, the plug and the socket are required to be plugged and unplugged more than 10000 times, and the plug and the socket have mechanical interlocking, and the safety protection meets the IP67 protection level requirement, and the plug and the socket also have fast transmission signal requirements.
[0003] Therefore, the part forming the insertion slot in the socket applied in the existing electronic endoscope system is generally welded and fixed on the circuit board, so that in the repeated plugging and unplugging process of the socket, the plug and the insertion slot are not accurately connected, the plug is lifted from the circuit board, and the plug and the socket are not connected. UTILITY MODEL CONTENTS
[0004] The utility model discloses a high protection socket and endoscope system, and aims at solving the problem that the part forming the insertion slot in the high protection socket in the traditional endoscope is easily lifted due to repeated plugging and unplugging operation, and the plug and the socket are not connected.
[0005] To achieve the above object, the utility model provides a high protection socket, which comprises:
[0006] The socket shell comprises a plug-in end plate, and the plug-in end plate is provided with an insertion channel.
[0007] The circuit board assembly is arranged in the socket shell and comprises a main circuit board and a plug-in shell connected to the main circuit board, and the plug-in shell is provided with an electrical connector slot on the side facing the insertion channel.
[0008] The stop structure is fixedly arranged on the main circuit board and is arranged on at least one side of the plug-in shell opposite to the main circuit board.
[0009] Optionally, the stop structure is in abutment with the outer wall of the plug-in shell on the side.
[0010] Optionally, the stop structure is arranged close to the slot of the electrical connector slot.
[0011] Optionally, the stop structure is connected and fixed with the plug-in end plate.
[0012] Optionally, the stop structure is integrally formed with the end plate.
[0013] Optionally, the stop structure has a first orthographic projection area on the main circuit board, and the electrical connector has a second orthographic projection area on the main circuit board.
[0014] The first orthographic projection area covers the second orthographic projection area.
[0015] Optionally, the stop structure comprises:
[0016] a first baffle plate arranged on a side of the plug-in shell opposite to the main circuit board; and
[0017] two second baffle plates arranged on opposite sides of the plug-in shell in a direction corresponding to a slot width direction of the electrical connector, and the second baffle plates are connected with the first baffle plate.
[0018] Optionally, the second baffle plates are arranged in a spaced manner from the main circuit board.
[0019] Optionally, the plug-in shell is provided with a mounting groove on a side facing the insertion channel, the plug-in shell is provided with an opening on a side facing the main circuit board, the opening communicates with the mounting groove, at least two rows of electrical connection terminals are arranged in the mounting groove in a spaced manner, the electrical connection terminals are electrically connected with the main circuit board through the opening, and the electrical connector is defined between the two rows of electrical connection terminals.
[0020] The distance between the second baffle plates and the main circuit board is not less than the height of the opening.
[0021] In addition, in order to achieve the above-mentioned purpose, the utility model also provides an endoscope system, comprising:
[0022] two machine bodies;
[0023] an electrical connection plug arranged on one of the machine bodies, the electrical connection plug being provided with an electrical connection protrusion; and
[0024] a high-protection socket as described above arranged on the other machine body, and the electrical connection protrusion and the electrical connector are repeatedly pluggable.
[0025] In the technical scheme provided by the utility model, the stop structure is arranged on a side of the plug-in shell opposite to the main circuit board, the stable connection between the stop structure and the main circuit board can effectively prevent the electrical connection protrusion from being lifted and plugged into the plug-in shell, thereby helping to ensure good electrical plugging between the electrical connection protrusion and the electrical connector; in addition, the stop structure can also form a shield on the outside of the electrical connector, thereby playing a certain auxiliary strengthening role in waterproofing, dustproofing, shielding and the like, and helping to improve the reliability of the electrical connection plug and the high-protection socket during repeated plugging and unplugging. BRIEF DESCRIPTION OF DRAWINGS
[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings described in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained based on the drawings shown without creative labor.
[0027] Figure 1 An embodiment of the high-protection socket provided by the present application is a perspective view in a first view angle;
[0028] Figure 2 For Figure 1 Front view schematic diagram of the medium-high protection socket;
[0029] Figure 3 For Figure 1 Side view schematic diagram of the medium-high protection socket;
[0030] Figure 4 For Figure 1 Perspective view of the medium-high protection socket in a second view angle;
[0031] Figure 5 For Figure 1 Sectional structure schematic diagram of the medium-high protection socket along the vertical direction at the plug-in shell.
[0032] Explanation of the reference signs:
[0033] 100 high-protection socket; 110 socket shell; 111 plug-in end plate; 111a insertion channel; 120 main circuit board; 130 plug-in shell; 131 mounting groove; 131a open mouth; 132 electric connection terminal; 132a electric connection slot; 140 stop structure; 141 first baffle; 142 second baffle.
[0034] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION
[0035] The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.
[0036] It should be noted that if the embodiments of the utility model have directionality indication (such as up, down, left, right, front, back, etc.), the directionality indication is only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), if the specific posture changes, the directionality indication also changes accordingly.
[0037] In addition, if the embodiments of the utility model have descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary technical personnel in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the utility model.
[0038] Please refer to Figures 1 to 5 The utility model provides a kind of high protection socket 100 and the endoscope system applied by it. Among them, in addition to high protection socket 100, endoscope system can also include with electric connection plug matched electric connection plug, and at least two bodies. Among them, electric connection plug and high protection socket 100 are correspondingly arranged at two bodies. The specific type of two bodies is not limited, can be but not limited to: one of the bodies is endoscope, another body is external control host, by the insertion of high protection socket 100 and electric connection plug, the electrical signal intercommunication between endoscope and control host can be realized. Or one of the bodies is endoscope, another body is external light source device, by the insertion of high protection socket 100 and electric connection plug, light emitted by external light source device can be guided to endoscope by optical fiber and inserted into the head end structure of main body.
[0039] For easy understanding, in the following embodiments, the endoscope system as a whole is taken as an example to be described, which has vertical, horizontal and longitudinal directions arranged in cross each other. And in specific application, vertical direction can correspond to gravity direction, with upward and downward directions arranged oppositely.
[0040] Specifically, the high-protection socket 100 provided by the utility model includes a socket shell 110, a circuit board assembly and a stop structure 140. Wherein, the socket shell 110 includes a plug-in end plate 111, and the plug-in end plate 111 is provided with an insertion channel 111a; the circuit board assembly is arranged in the socket shell 110, and includes a main circuit board 120 and a plug-in shell 130 connected at the main circuit board 120, and the plug-in shell 130 is provided with an electric plug-in slot 132a on the side facing the insertion channel 111a; the stop structure 140 is fixedly arranged on the main circuit board 120, and is arranged at least on the side of the plug-in shell 130 away from the main circuit board 120.
[0041] In the technical scheme provided by the utility model, the stop structure 140 is arranged on the side of the plug-in shell 130 away from the main circuit board 120, and the stable connection between the stop structure 140 and the main circuit board 120 can effectively prevent the electric plug-in protrusion from lifting the plug-in shell 130, thereby helping to ensure the good electrical connection between the electric plug-in protrusion and the electric plug-in slot 132a; in addition, the stop structure 140 can also form a shield on the outside of the electric plug-in slot 132a, thereby playing a certain auxiliary strengthening role in waterproofing, dustproofing, shielding and the like, and helping to improve the reliability of the electric connection plug and the high-protection socket 100 during repeated plugging and unplugging.
[0042] Please specifically combine Figures 1 to 5 The socket shell 110 forms an installation cavity inside. The circuit board assembly is at least partially accommodated in the installation cavity. Specifically, the socket shell 110 extends approximately along the longitudinal direction. The longitudinal end wall of the socket shell 110 constitutes the plug-in end plate 111. The socket shell 110 further includes a bottom plate, and the bottom plate and the plug-in end plate 111 are connected and fixed after being integrally formed, or are connected and fixed after being separately formed and then being detachably or non-detachably connected. The bottom plate extends approximately along the longitudinal direction and the transverse direction. The main circuit board 120 in the circuit board assembly also extends approximately along the longitudinal direction and the transverse direction, and is supported and fixed on the bottom plate by means of columnar feet.
[0043] The columnar feet can be provided between the bottom plate and the main circuit board 120, or can be dispersedly arranged, so as to ensure the stable support of the main circuit board 120 on the bottom plate. The columnar feet can be fixed with the bottom plate by means of integral forming, and a detachable connecting piece can be further arranged between the columnar feet and the main circuit board 120, for example, threaded holes are formed at the corresponding positions of the columnar feet and the main circuit board 120, and then a threaded piece is connected with the two threaded holes in sequence, so as to limit the main circuit board 120 on the columnar feet.
[0044] Then, at least one of the longitudinal sides and the lateral sides of the main circuit board 120 can abut against the inner wall of the socket shell 110, and the lateral positioning of the main circuit board 120 is realized by the socket shell 110. Of course, at least one of the longitudinal sides and the lateral sides of the main circuit board 120 can also be spaced apart from the inner wall of the socket shell 110 to form a gap, so that the gap communicates with the space formed between the main circuit board 120 and the bottom plate, thereby forming an annular heat dissipation path for the hot air generated at the main circuit board 120 to circulate.
[0045] The plug-in housing 130 is accommodated in the socket shell 110, and specifically can be arranged at the side of the main circuit board 120 facing away from the bottom plate. It can be understood that the plug-in housing 130 defines an electrical plug-in slot 132a. The plug-in end plate 111 is longitudinally provided with an insertion channel 111a, which communicates with the installation cavity of the socket shell 110 and is opposite and communicates with the slot of the electrical plug-in slot 132a. In this way, when the electrical contact protrusions in the electrical connection plug matched with the high-protection socket 100 translate along the insertion channel 111a, they can be inserted into the electrical plug-in slot 132a under the accurate guidance of the insertion channel 111a.
[0046] Specifically, in an embodiment, the plug-in housing 130 is provided with an installation slot 131 on the side facing the insertion channel 111a, and the slot of the installation slot 131 is opposite and communicates with the channel of the insertion channel 111a. The plug-in housing 130 is vertically spaced apart by at least two rows of electrical terminals 132 in the installation slot 131, and each row of electrical terminals 132 extends along the lateral direction. Each two adjacent rows of electrical terminals 132 define an electrical plug-in slot 132a. When the electrical contact protrusions are inserted into the electrical plug-in slot 132a, the electrical contact protrusions are in contact with the electrical terminals 132, and the electrical connection is completed.
[0047] Further, the plug-in housing 130 can be provided with an opening 131a communicating with the installation slot 131 on the side facing the main circuit board 120. The opening 131a can at least expose part of the electrical terminals 132, so that the electrical terminals 132 realize electrical connection with the predetermined contacts on the main circuit board 120 through the opening 131a.
[0048] The specific form of the plug-in shell 130 is not limited, and the plug-in shell 130 can have different shapes, sizes, materials and the like according to actual needs. For example, the plug-in shell 130 can be directly made of hard insulating material. Alternatively, in an embodiment, the plug-in shell 130 can be made of elastic material as a whole, or at least the part where the mounting groove 131 is formed can be made of elastic material. In this way, when the plug-in direction of the electrical contact protrusion is inclined to exert force on the plug-in shell 130, the plug-in shell 130 can offset the force exerted by the electrical contact protrusion by generating a certain degree of elastic deformation, thereby avoiding that the plug-in shell 130 is driven by the electrical contact protrusion to move vertically away from the main circuit board 120. Moreover, under the action of the electrical contact protrusion, the slot of the mounting groove 131 is deformed to be flared, which can also assist in guiding the electrical contact protrusion into the electrical contact slot 132a.
[0049] In order to achieve tight connection during repeated plugging and unplugging of the electrical contact slot 132a and the electrical contact protrusion, in specific applications, one of the plug housing and the socket housing 110 can be provided with a buckle, and the other can be provided with a buckle hole. When the electrical contact slot 132a and the electrical contact protrusion are inserted into place, the buckle and the buckle hole are buckled and fixed to lock the electrical contact slot 132a and the electrical contact protrusion in the current state of being inserted into place.
[0050] Based on one or more of the above embodiments, further, the stop structure 140 is at least arranged on the side of the plug-in shell 130 away from the main circuit board 120. That is, the stop structure 140 is externally arranged on the plug-in shell 130 and directly stops and limits the plug-in shell 130 in the vertical direction, so that when the electrical contact protrusion exerts a force on the electrical contact slot 132a during plugging and unplugging to move away from the main circuit board 120 in the vertical direction, the stop structure 140 can effectively prevent the plug-in shell 130 from being driven away from the main circuit board 120, thereby ensuring that the electrical connection between the electrical contact terminal 132 and the main circuit board 120 is stable and effective.
[0051] Specifically, the stop structure 140 can be kept at a certain distance from the outer wall of the plug-in shell 130 in the vertical direction, that is, not completely abutting the plug-in shell 130. If a first distance is formed between the stop structure 140 and the plug-in shell 130, when the plug-in shell 130 is driven to move away from the main circuit board 120 in the vertical direction without exceeding the first distance, the stop structure 140 will not abut the plug-in shell 130, and the warping of the plug-in shell 130 within this range will not damage the electrical connection between the electrical contact terminal 132 and the main circuit board 120.
[0052] In this embodiment, the stop structure 140 can abut the outer wall of the plug-in shell 130 in the vertical direction. In this way, as long as the electrical contact protrusion drives the plug-in shell 130 to have a stroke away from the main circuit board 120 in the vertical direction, the stop structure 140 can stop and limit it.
[0053] In the design, the stop structure 140 is arranged as close to the slot of the electrical connector 132a as possible. In this way, the stop structure 140 can play its role of stopping and limiting as soon as the electrical connector is inserted into the electrical connector 132a, until the electrical connector and the electrical connector 132a are inserted into place.
[0054] The stop structure 140 described above can be arranged separately from the plug-in end plate 111, for example, fixedly connected with the bottom plate or any side plate of the socket housing 110. Alternatively, the stop structure 140 is fixedly connected with the plug-in end plate 111, so that the stop structure 140 is as close to the slot of the electrical connector 132a as possible. Specifically, the stop structure 140 and the plug-in end plate 111 can be integrally formed, or can be connected or fixed after being separately formed.
[0055] The stop structure 140 can be arranged on one side of the plug-in housing 130 away from the main circuit board 120. Specifically, when the stop structure 140 has a first orthographic projection area on the main circuit board 120, and the electrical connector 132a has a second orthographic projection area on the main circuit board 120, the first orthographic projection area and the second orthographic projection area at least partially overlap. For example, the first orthographic projection area and the second orthographic projection area overlap in the area close to the plug-in end plate 111, and the overlapping area of the two can reach one-half to two-thirds of the second orthographic projection area.
[0056] Further optionally, the first orthographic projection area can also completely cover the second orthographic projection area, including that the first orthographic projection area just covers the second orthographic projection area, or the first orthographic projection area not only covers the second orthographic projection area but also exceeds the second orthographic projection area. In this way, the stop structure 140 can effectively stop and limit at least in the entire stroke segment of the electrical connector inserted into the electrical connector 132a.
[0057] Of course, the stop structure 140 can also be arranged as at least two. At this time, each of the stop structures 140 is arranged in sequence along the longitudinal direction. At least one of the stop structures 140 is arranged as close to the slot of the electrical connector 132a as possible, and at least another one of the stop structures 140 is arranged as close to the bottom of the electrical connector 132a as possible, and the remaining stop structures 140 can be arranged between the two stop structures 140.
[0058] In addition, the stop structure 140 described above can also be arranged on both sides of the plug-in housing 130 in the transverse direction. Specifically, as shown in FIG. 6, the stop structure 140 is arranged on both sides of the plug-in housing 130 in the transverse direction, and the stop structure 140 arranged on the left side of the plug-in housing 130 is arranged as close to the slot of the electrical connector 132a as possible, and the stop structure 140 arranged on the right side of the plug-in housing 130 is arranged as close to the bottom of the electrical connector 132a as possible. Figures 1 to 5As shown, in an embodiment, the stop structure 140 comprises a first baffle 141 and two second baffles 142. The first baffle 141 is arranged on the side of the plug-in shell 130 opposite to the main circuit board 120. The two second baffles 142 are arranged on opposite sides of the plug-in shell 130 in correspondence with the slot width direction of the electrical plug-in slot 132a, and the second baffles 142 are connected with the first baffle 141. The first baffle 141 and the two second baffles 142 jointly enclose a U-shaped structure, and the plug-in shell 130 can be covered on the main circuit board 120. The first baffle 141 and the second baffle 142 can be integrally formed, or can be connected after being separately formed.
[0059] The second baffle 142 can extend longitudinally to be spaced apart from the butt joint end plate, or can extend longitudinally to be connected and fixed with the butt joint end plate. Similarly, the second baffle 142 and the butt joint end plate can be integrally formed, or can be connected after being separately formed.
[0060] The second baffle 142 can extend vertically to directly abut against the main circuit board 120. Alternatively, in an embodiment, the second baffle 142 extends vertically to be arranged in a spaced apart manner with the main circuit board 120. In this way, the second baffle 142 does not directly contact the main circuit board 120, which can reduce the size design burden of the second baffle 142 and the plug-in shell 130 to some extent, and can effectively reduce the mutual interference between the second baffle 142 and the main circuit board 120. In this way, the second baffle 142 does not occupy the board space of the main circuit board 120, so that the main circuit board 120 can reserve sufficient space for the layout and wiring design of the required electronic components.
[0061] Further, when the mounting groove 131 is opened on the side of the plug-in housing 130 facing the insertion channel 111a as described above, the side of the plug-in housing 130 facing the main circuit board 120 is provided with an opening 131a communicating with the mounting groove 131, and at least two rows of electrical connection terminals 132 are arranged in the mounting groove 131, and the electrical connection terminals 132 are electrically connected to the main circuit board 120 through the opening 131a. The distance between the second baffle 142 and the main circuit board 120 can be specifically designed to be not less than the height of the opening 131a. It can be understood that the opening 131a is opened on the side of the plug-in housing 130 close to the main circuit board 120 in the vertical direction, so as to facilitate the electrical connection terminals 132 to be electrically connected to the preset electronic components on the main circuit board 120 through the opening 131a, or to be wired. In order to make the space of the preset electronic components or wiring on the main circuit board 120 more sufficient, generally, at least one side wall of the plug-in housing 130 is provided with a notch, and the notch can communicate with the mounting groove 131. The height of the opening 131a is equivalent to the width of the notch in the vertical direction. When the distance between the second baffle 142 and the main circuit board 120 is not less than the height of the opening 131a, the above-mentioned notch can be completely exposed, so that on the one hand, the arrangement of the second baffle 142 does not affect the arrangement of the preset electronic components or wiring in the main circuit board 120, and on the other hand, the preset electronic components or wiring in the main circuit board 120 can be seen, which facilitates the user to confirm the state of the preset electronic components or wiring in the main circuit board 120 through the distance and the notch.
[0062] In addition, the stop structure 140 in any of the above embodiments can be made of shielding material, so that when the first baffle 141 and the second baffle 142 in the stop structure 140 cover the outside of the plug-in housing 130, the shielding effect can be achieved at the same time. At this time, the stop structure 140 can further extend to completely cover the plug-in housing 130, achieving a better shielding effect.
[0063] The above description is only preferred embodiments of the present application, and does not limit the patent range of the present application. Any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the present application.
Claims
1. A high protection socket, characterized in that, The utility model relates to a high-protection socket, comprising: a socket shell comprising a plug-in end plate, the plug-in end plate being provided with an insertion channel; a circuit board assembly arranged in the socket shell and comprising a main circuit board and a plug-in housing connected to the main circuit board, the plug-in housing being provided with an electrical plug-in slot on a side facing the insertion channel; and a stop structure fixedly arranged on the main circuit board and arranged to stop at least a side of the plug-in housing opposite to the main circuit board.
2. The high-guard receptacle of claim 1, wherein, The stop structure abuts against an outer wall of the plug-in housing on the side.
3. The high-guard receptacle of claim 1, wherein, The stop structure is arranged close to a slot opening of the electrical plug-in slot.
4. The high-guard receptacle of claim 1, wherein, The stop structure is fixedly connected to the plug-in end plate.
5. The high-guard receptacle of claim 4, wherein, The stop structure is integrally formed with the end plate.
6. The high-guard receptacle of claim 1, wherein, The stop structure has a first orthographic projection area on the main circuit board, and the electrical plug-in slot has a second orthographic projection area on the main circuit board. The first orthographic projection area covers the second orthographic projection area.
7. A high protection socket according to any one of claims 1 to 6, characterized in that The stop structure comprises: a first baffle arranged on the side of the plug-in housing opposite to the main circuit board; and two second baffles arranged on opposite sides of the plug-in housing in a direction corresponding to a slot width direction of the electrical plug-in slot, the second baffles being connected to the first baffle.
8. The high-guard receptacle of claim 7, wherein, The second baffles are arranged spaced apart from the main circuit board.
9. The high-guard receptacle of claim 8, wherein, The plug-in housing is provided with a mounting groove on the side facing the insertion channel, the plug-in housing being provided with an opening on a side facing the main circuit board, the opening communicating with the mounting groove, at least two rows of electrical connection terminals being arranged in the mounting groove in a spaced apart manner, the electrical plug-in slot being defined between the two rows of electrical connection terminals, the electrical connection terminals being electrically connected to the main circuit board through the opening; The distance between the second baffles and the main circuit board is not less than the height of the opening.
10. An endoscope system characterized by comprising: The utility model relates to a high-protection socket, comprising: two machine bodies; an electrical connection plug arranged in one of the machine bodies, the electrical connection plug being provided with an electrical connection protrusion; and the high-protection socket according to any one of claims 1 to 9, the high-protection socket being arranged in the other machine body, and the electrical connection protrusion being repeatedly pluggable with the electrical plug-in slot.