阅读说明：本技术 一种模块化组合式隔离刀闸 (Modular combined isolation switch ) 是由 朱佩龙 欧张力 郑佳 蒲德湘 蒋孝海 于 2021-08-03 设计创作，主要内容包括：本申请公开了一种模块化组合式隔离刀闸,包括绝缘轴架,所述绝缘轴架上沿左右方向开设有多个安装腔室,所述安装腔室内适于固定安装多种触刀模块。所述安装腔室呈框架结构,包括上下布置并沿左右方向延伸的横梁以及前后布置并沿上下方向延伸的方棒,所述方棒适于固定连接所述横梁,所述触刀模块适于安装于所述方棒上。具有标准化程度高,适用性强,装配简便,安全可靠的优点。(The application discloses knife switch is kept apart to modularization combination formula, including insulating pedestal, a plurality of installation cavities have been seted up along the left and right direction on the insulating pedestal, be suitable for the multiple tool touching module of fixed mounting in the installation cavity. The mounting chamber is of a frame structure and comprises a cross beam which is arranged from top to bottom and extends along the left-right direction and a square rod which is arranged from front to back and extends along the up-down direction, the square rod is suitable for being fixedly connected with the cross beam, and the contact knife module is suitable for being mounted on the square rod. The device has the advantages of high standardization degree, strong applicability, simple and convenient assembly, safety and reliability.)

1. The utility model provides a modularization combination formula isolation switch which characterized in that: the tool setting device comprises an insulating shaft frame, wherein a plurality of installation cavities are formed in the insulating shaft frame in the left-right direction, and a plurality of contact cutter modules are fixedly installed in the installation cavities.

2. The modular combined isolating switch of claim 1, further comprising: the mounting cavity is of a frame structure and comprises a cross beam which is arranged up and down and extends along the left-right direction and a square rod which is arranged front and back and extends along the up-down direction, the square rod is suitable for being fixedly connected with the cross beam, and the contact knife module is suitable for being mounted on the square rod.

3. The modular combined isolating switch as claimed in claim 2, wherein: clamping grooves are formed in the front side and the rear side of the cross beam, and the upper end and the lower end of the square rod are suitable for being clamped in the clamping grooves; the square bar is provided with a mounting hole, a fastening component is suitable for penetrating through the mounting hole, and the fastening component is suitable for penetrating through the contact cutter module and mounting the contact cutter module on the square bar; the clamping groove limits the displacement of the square rod along the vertical direction and the left-right direction, and the clamping groove, the fastening assembly and the contact knife module are matched to limit the displacement of the square rod along the front-back direction.

4. A modular combined isolating switch according to claim 3, characterised in that: the touch knife module is of a knife board structure and comprises a plurality of touch knife boards and elastic pre-tightening assemblies, the touch knife boards are distributed along the left and right direction, and the elastic pre-tightening assemblies are arranged on the touch knife boards at two sides and provide clamping force for the touch knife boards along the left and right direction; the mounting hole faces in the left-right direction, and the fastening assembly penetrates through the touch knife plate and the mounting hole in the left-right direction and installs the touch knife module on the square rod.

5. A modular combined isolating switch according to claim 3, characterised in that: the touch knife module is of a touch finger structure and comprises touch finger sheets, a support and plate springs, the touch finger sheets are stacked in the vertical direction and divided into two groups to be mounted on the left side and the right side of the support, and the plate springs are arranged between the touch finger sheets and the support and provide clamping force for the touch finger sheets in the horizontal direction; the mounting hole faces in the front-back direction, and the fastening assembly penetrates through the support and the mounting hole in the front-back direction and mounts the contact knife module on the square rod.

6. The modular combined isolating switch of claim 5, wherein: the support is frame construction, the support includes that two crossbearers and two indulge the frame, the crossbearer is U type structure, two the crossbearer is along upper and lower direction to closing and cladding touch and indicate the piece, indulge the frame and be U type structure, two it is along closing and spacing around indulging the frame the crossbearer, just it is located both sides to indulge the frame touch and indicate between the piece, fastening component passes two in proper order along the direction of back before following indulge the frame, the leaf spring set up in the crossbearer with touch and indicate between the piece.

7. The modular combined isolating switch of claim 6, wherein: the plate spring comprises an arched plate and a plurality of pressure fingers, the arched plate extends along the vertical direction, the pressure fingers are arranged on two sides of the arched plate and extend along the front-back direction, and the pressure fingers are distributed at intervals along the vertical direction and correspond to the contact finger sheets one by one; the outer side of the arched plate is suitable for abutting against the cross frame, and the inner side of the pressing finger is suitable for abutting against the touch finger piece, so that the plate spring can provide clamping force of the touch finger piece along the left-right direction.

8. The modular combined isolating switch of claim 7, wherein: the pressure fingers are gradually reduced from the root to the top.

9. The modular combined isolating switch of claim 7, wherein: the front side and the rear side of the transverse frame are provided with first positioning grooves, and the longitudinal frame is clamped in the first positioning grooves; the upper end and the lower end of the arched plate extend out of positioning convex plates, the upper side and the lower side of the cross frame are provided with second positioning grooves, and the plate spring extends into the second positioning grooves through the positioning convex plates and is mounted on the cross frame; the contact finger piece is provided with a third positioning groove on the outer side, and the plate spring is arranged in the third positioning groove.

10. A modular combined isolating switch according to any one of claims 3 to 9, characterised in that: the square rod is in a cubic column structure, the clamping grooves are in corresponding rectangular groove structures, and the square rod can be turned over by 90 degrees or multiples of 90 degrees and is embedded into the clamping grooves for positioning;

an insulating skirt edge is further arranged between the mounting chambers, and reinforcing ribs are further arranged between the cross beams; and the insulating shaft bracket is also provided with a driving crank arm which is suitable for being connected with the isolation main shaft.

Technical Field

The application relates to the field of power equipment, in particular to an isolation switch.

Background

The isolating switch is an important component in the gas-filled cabinet and is responsible for the important task of electricity distribution, and the isolating knife switch is a key part of the isolating switch. In the prior art, two parallel copper sheets are usually used as an isolation switch, one end of the isolation switch is hinged to a fixed contact, and the other end of the isolation switch is driven by an isolation main shaft to be closed or separated from a movable contact. However, basically, each type of inflatable cabinet needs to design isolation switches with different structures according to parameter requirements such as credit voltage, credit current, protection level and the like, so that the difficulty of design work is increased, and the manufacturing cost of the inflatable cabinet is also increased.

Therefore, how to change the design idea of the existing isolating switch to overcome the above problems is a problem to be solved urgently by those skilled in the art.

Disclosure of Invention

An aim at of this application provides a standardization level height, and the suitability is strong, and the assembly is simple and convenient, safe and reliable's modularization combination formula isolation switch.

In order to achieve the above purposes, the technical scheme adopted by the application is as follows: the utility model provides a modularization combination formula isolation switch which characterized in that: the tool setting device comprises an insulating shaft frame, wherein a plurality of installation cavities are formed in the insulating shaft frame in the left-right direction, and a plurality of contact cutter modules are fixedly installed in the installation cavities.

Preferably, the installation chamber is of a frame structure, the installation chamber comprises a cross beam which is arranged up and down and extends along the left-right direction and a square rod which is arranged back and forth and extends along the up-down direction, the square rod is suitable for being fixedly connected with the cross beam, and the contact knife module is suitable for being installed on the square rod. The frame structure can bear the same vertical load and horizontal load at the same time, so that the stability of the operation of the contact cutter module is ensured; in addition, the square rod and the cross beam are separately arranged, so that the square rod and the cross beam are convenient to disassemble and assemble.

As a specific arrangement of the frame structure, the front side and the rear side of the cross beam are both provided with clamping grooves, and the upper end and the lower end of the square rod are suitable for being clamped in the clamping grooves; the square bar is provided with a mounting hole, a fastening component is suitable for penetrating through the mounting hole, and the fastening component is suitable for penetrating through the contact cutter module and mounting the contact cutter module on the square bar; the clamping groove limits the displacement of the square rod along the vertical direction and the left-right direction, and the clamping groove, the fastening assembly and the contact knife module are matched to limit the displacement of the square rod along the front-back direction.

As an implementation mode, the touch knife module is of a knife plate structure, the touch knife module comprises a plurality of touch knife plates and elastic pre-tightening assemblies, the touch knife plates are distributed along the left-right direction, and the elastic pre-tightening assemblies are arranged on the touch knife plates on the two sides and provide clamping force for the touch knife plates along the left-right direction; the mounting hole faces in the left-right direction, and the fastening assembly penetrates through the touch knife plate and the mounting hole in the left-right direction and installs the touch knife module on the square rod.

As another embodiment, the touch knife module is of a touch finger structure, the touch knife module comprises touch finger sheets, a support and plate springs, the touch finger sheets are stacked along the vertical direction and divided into two groups to be mounted on the left side and the right side of the support, and the plate springs are arranged between the touch finger sheets and the support and provide clamping force for the touch finger sheets along the horizontal direction; the mounting hole faces in the front-back direction, and the fastening assembly penetrates through the support and the mounting hole in the front-back direction and mounts the contact knife module on the square rod.

Preferably, the support is of a frame structure, the support comprises two crossbearers and two longitudinal frames, each crossbearer is of a U-shaped structure, the crossbearers are folded and coated on the touch finger pieces in the vertical direction, each longitudinal frame is of a U-shaped structure, the longitudinal frames are folded and limited in the front and back direction, the longitudinal frames are located on two sides of the touch finger pieces, the fastening assemblies sequentially penetrate through the longitudinal frames in the front and back direction, and the plate springs are arranged between the crossbearers and the touch finger pieces. Similarly, the bracket of the frame structure simultaneously bears the same vertical load and horizontal load, so that the installation stability of the finger touching sheet and the plate spring is ensured; in addition, the transverse frame and the longitudinal frame can be formed by sheet metal after cutting or stamping of a plate, and the transverse frame and the longitudinal frame have the advantages of convenience in processing and low cost; moreover, the involution splicing mode of the transverse frame and the longitudinal frame has the advantage of convenient assembly; it is worth mentioning that the crossbearers and the longitudinal frames are formed by processing metal plates, have certain deformation capacity, can use tools to knock or clamp or punch the crossbearers and the longitudinal frames in the assembling process or after the assembling is completed, so that the crossbearers and the longitudinal frames are matched more tightly, and the contact finger sheets are more reliably fixed.

Preferably, the plate spring comprises an arched plate and pressure fingers, the arched plate extends along the vertical direction, the pressure fingers are arranged on two sides of the arched plate and extend along the front-back direction, and the pressure fingers are distributed at intervals along the vertical direction and correspond to the contact finger sheets one by one; the outer side of the arched plate is suitable for abutting against the cross frame, and the inner side of the pressing finger is suitable for abutting against the touch finger piece, so that the plate spring can provide clamping force of the touch finger piece along the left-right direction. The structure setting of bow-shaped board and pressure finger guarantees that each touches the finger piece and can both receive sufficient elasticity effect, guarantees to touch the holistic clamp force of sword module.

Preferably, the pressure fingers are gradually reduced from the root to the top. The arrangement of the thick root part and the thin top part of the pressure finger enables the elastic deformation to be more uniform, and the elastic strength and the service life of the pressure finger are ensured.

As an improvement, the front side and the rear side of the transverse frame are provided with first positioning grooves, and the longitudinal frame is clamped in the first positioning grooves; the upper end and the lower end of the arched plate extend out of positioning convex plates, the upper side and the lower side of the cross frame are provided with second positioning grooves, and the plate spring extends into the second positioning grooves through the positioning convex plates and is mounted on the cross frame; the contact finger piece is provided with a third positioning groove on the outer side, and the plate spring is arranged in the third positioning groove. The arrangement of the first positioning groove, the second positioning groove and the third positioning groove enables the overall structure of the cutter contact module to be more stable and reliable, and the installation is convenient.

Preferably, the square rod is of a cubic column structure, the clamping groove is of a corresponding rectangular groove structure, and the square rod can be turned over by 90 degrees or multiples of 90 degrees and is embedded into the clamping groove for positioning. The applicability and the installation simplicity of the scheme are further improved by the aid of the arrangement.

As a conventional arrangement, an insulating skirt is arranged between the mounting chambers to ensure the insulating property; reinforcing ribs are arranged between the cross beams to ensure the structural strength; and the insulating shaft bracket is also provided with a driving crank arm which is suitable for being connected with the isolation main shaft.

Compared with the prior art, the beneficial effect of this application lies in: this scheme adopts the insulating pedestal of same specification, can install the feeler tool module of different specifications for this scheme has stronger suitability. Moreover, the insulating shaft bracket with uniform specification can realize standardization, so that the design and manufacturing cost can be reduced on one hand, and the product quality can be ensured on the other hand. In addition, the touch knife module adopts a modular design, and can also realize standardization, for example, touch knife modules with different structures and different specifications can be selected according to different amounts of current without redesigning the touch knife module, so that the design and manufacturing cost can be reduced, and the product quality can be ensured.

It is worth mentioning that the insulation shaft bracket and the contact cutter module which are designed in a standardized way can be produced and reserved in advance and used for balancing the productivity in the busy season and the off season; moreover, the insulating shaft bracket and the contact knife module which are designed in a standardized manner have absolute universality, and can be assembled in different manners such as in-plant assembly, on-site assembly, subsequent modification and the like according to requirements, so that the assembly is more standardized and simpler.

Drawings

FIG. 1 is a schematic perspective view of a preferred embodiment of the present application (including different sized touch blade modules) showing six direction indications, front-back, left-right, up-down, and left-right;

FIG. 2 is a schematic perspective view of a first touch blade module according to a preferred embodiment of the present application;

FIG. 3 is a schematic perspective view of a second contact knife module according to a preferred embodiment of the present application;

FIG. 4 is a schematic perspective view of a third trolley module in accordance with a preferred embodiment of the present application;

FIG. 5 is a schematic perspective view of a fourth trolley module in accordance with a preferred embodiment of the present application;

FIG. 6 is a schematic view of the mounting of a touch blade module of a blade structure according to a preferred embodiment of the present application;

FIG. 7 is a schematic view of the mounting of a contact knife module of a contact finger configuration according to a preferred embodiment of the present application;

FIG. 8 is a front view of a contact knife module of a contact finger structure according to a preferred embodiment of the present application;

FIG. 9 is a schematic illustration of an exploded state of a contact knife module of a contact finger configuration in accordance with a preferred embodiment of the present application;

FIG. 10 is a perspective view of an insulating pedestal according to a preferred embodiment of the present application;

FIG. 11 is a front view of a finger tab according to a preferred embodiment of the present application;

FIG. 12 is a side view of a leaf spring according to a preferred embodiment of the present application;

FIG. 13 is a front view of a leaf spring according to a preferred embodiment of the present application;

FIG. 14 is an enlarged view at A of FIG. 13 in accordance with a preferred embodiment of the present application;

fig. 15 is a schematic structural view of a conventional press finger according to the present application.

In the figure: 1. an insulating shaft bracket; 2. a touch knife module; 2a, a first contact cutter module; 2b, a second contact cutter module; 2c, a third contact cutter module; 2d, a fourth touch knife module; 3. a fastening assembly; 4. driving the crank arm; 10. installing a chamber; 11. a cross beam; 12. a square bar; 13. a card slot; 14. an insulating skirt; 15. reinforcing ribs; 121. mounting holes; 21. a cutter touching plate; 22. an elastic pre-tightening component; 23. a finger touch sheet; 24. a support; 25. a plate spring; 241. a cross frame; 242. a longitudinal frame; 2411. a first positioning groove; 2412. a second positioning groove; 231. a third positioning groove; 251. an arcuate plate; 252. pressing fingers; 2511. and positioning the convex plate.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1, a preferred embodiment of the present application includes an insulating shaft bracket 1, three mounting cavities 10 are opened on the insulating shaft bracket 1 along the left-right direction, and a contact knife module 2 is suitable for being fixedly mounted in the mounting cavities 10. The key point is that the insulating shaft bracket 1 of the present embodiment adopts a unified specification, the contact blade module 2 of the present embodiment adopts a standardized and modularized design, and lists four specifications, namely a first contact blade module 2a with a rated current of 630A, a second contact blade module 2b with a rated current of 1250A, a third contact blade module 2c with a rated current of 2000A, and a fourth contact blade module 2d with a rated current of 2500A.

As shown in fig. 2, it is a schematic view of a three-dimensional structure when the first contact module 2a is mounted on the insulating shaft bracket 1; as shown in fig. 3, it is a schematic perspective view of the second contact module 2b when it is mounted on the insulating shaft bracket 1; as shown in fig. 4, it is a schematic perspective view of the third contact module 2c when it is mounted on the insulating shaft bracket 1; as shown in fig. 5, it is a schematic perspective view of the fourth contact module 2d when it is mounted on the insulating shaft bracket 1.

On the basis of the above modular structure, the embodiment further optimizes and improves the specific combination manner, which is specifically as follows:

as shown in fig. 1 to 6 and 10, the installation chamber 10 is a frame structure, the installation chamber 10 includes a cross beam 11 disposed up and down and extending in the left-right direction, and a square bar 12 disposed back and forth and extending in the up-down direction, the square bar 12 is adapted to be fixedly connected to the cross beam 11, and the feeler-cutter module 2 is adapted to be installed on the square bar 12. As a concrete arrangement of the frame structure, the front side and the rear side of the beam 11 are both provided with a clamping groove 13, and the upper end and the lower end of the square rod 12 are suitable for being clamped in the clamping grooves 13; the square bar 12 is provided with a mounting hole 121, the mounting hole 121 is internally suitable for being penetrated by the fastening component 3, and the fastening component 3 is suitable for being penetrated by the contact knife module 2 and mounting the contact knife module 2 on the square bar 12; the clamping groove 13 limits the displacement of the square rod 12 along the up-down direction and the left-right direction, and the clamping groove 13, the fastening component 3 and the contact knife module 2 are matched to limit the displacement of the square rod 12 along the front-back direction. The square rod 12 is in a cubic column structure, the clamping groove 13 is in a corresponding rectangular groove structure, and the square rod 12 can be turned for 90 degrees or multiples of 90 degrees and is embedded into the clamping groove 13 for positioning.

In the present embodiment, the fastening member 3 is preferably a bolt and nut combination, but the present application does not exclude other general structures that can be fastened. Since the bolt-nut combination is common knowledge, the present embodiment does not describe the specific structure and the specific installation manner, but this does not prevent the technical features from being implied in the present application.

As an insulating design, insulating skirts 14 are also provided between the mounting chambers 10. As strength setting, reinforcing ribs 15 are also arranged between the cross beams 11; as a general arrangement, the insulating shaft bracket 1 is also provided with a driving crank arm 4, and the driving crank arm 4 is suitable for being connected with an isolation main shaft.

As shown in fig. 2 and 3, the first contact blade module 2a and the second contact blade module 2b are both of blade plate structures, and the difference between the two is as follows: the first touch knife module 2a is provided with a group of knife boards on one phase, and the second touch knife module 2b is provided with two groups of knife boards which are distributed up and down on one phase.

As shown in fig. 6, the touch knife module 2 of the knife plate structure includes a plurality of touch knife plates 21 and elastic pre-tightening assemblies 22, the touch knife plates 21 are distributed along the left and right direction, and the elastic pre-tightening assemblies 22 are arranged on the touch knife plates 21 at two sides and provide clamping force for the touch knife plates 21 along the left and right direction; at this time, the mounting hole 121 is oriented in the left-right direction, the fastening assembly 3 passes through the touch blade plate 21 and the mounting hole 121 in the left-right direction and mounts the touch blade module 2 on the square bar 12.

It should be noted that the elastic pre-tightening assembly 22 generally includes a compression bolt, a compression nut, a contact spring, a spacer sleeve, etc., and since the above structures are common knowledge, the present embodiment does not describe the specific structure and the specific installation manner, but does not prevent the technical features from being implied by the present application.

As shown in fig. 4 and 5, the third contact module 2c and the fourth contact module 2d are both in a contact finger structure, and the difference is as follows: the finger tabs 23 of the fourth feeler-knife module 2d are stacked more than the finger tabs 23 of the third feeler-knife module 2 c.

As shown in fig. 7 to 9, the feeler block 2 of the feeler structure includes a feeler piece 23, a bracket 24, and a plate spring 25, the feeler pieces 23 are stacked in the up-down direction and divided into two groups to be installed at the left and right sides of the bracket 24, and the plate spring 25 is disposed between the feeler piece 23 and the bracket 24 and provides a clamping force of the feeler piece 23 in the left-right direction; at this time, the mounting hole 121 is oriented in the front-rear direction, the fastening member 3 passes through the bracket 24 and the mounting hole 121 in the front-rear direction, and the touch blade module 2 is mounted on the square bar 12.

Compare with the installation of the contact knife module 2 of the cutting board structure, only need to rotate the square rod 12 by 90 degrees, change the orientation of the mounting hole 121, just can install the contact knife module 2 of the contact finger structure on the insulating pedestal 1 and the square rod 12 of the same structure, realize higher commonality.

Similarly, the support 24 is also in a frame structure, the support 24 includes two transverse frames 241 and two longitudinal frames 242, the transverse frames 241 are in a U-shaped structure, the two transverse frames 241 are folded and cover the finger touching sheets 23 along the vertical direction, the longitudinal frames 242 are in a U-shaped structure, the two longitudinal frames 242 are folded and combined along the front and back direction to limit the transverse frames 241, the longitudinal frames 242 are located between the finger touching sheets 23 on the two sides, the fastening component 3 sequentially penetrates through the two longitudinal frames 242 along the front and back direction, and the plate spring 25 is disposed between the transverse frames 241 and the finger touching sheets 23.

As shown in fig. 9, 12 and 13, the plate spring 25 of the present embodiment includes an arcuate plate 251 and pressure fingers 252, the arcuate plate 251 extends in the up-down direction, the pressure fingers 252 are provided on both sides of the arcuate plate 251 and extend in the front-rear direction, and a plurality of pressure fingers 252 are distributed at intervals in the up-down direction and correspond to the finger contact pieces 23 one by one; the outer side of the arched plate 251 is adapted to abut against the cross frame 241, and the inner side of the pressing finger 252 is adapted to abut against the finger piece 23, so that the plate spring 25 can provide a clamping force of the finger piece 23 in the left-right direction.

As shown in fig. 14, the pressure finger 252 of the present embodiment is gradually reduced from the root to the tip. The arrangement of the thick root and the thin top of the pressure finger 252 makes the elastic deformation more uniform, and ensures the elastic strength and the service life. In addition, the press fingers 252 are arranged in a circular arc shape, so that abrasion to the contact finger piece 23 can be reduced, and the service life of the press fingers is also ensured.

As shown in fig. 15, the pressing finger 252 is a conventional constant-width structure, and it is found in product use that the pressing finger 252 of the structure is easily broken at the root. For this reason, the applicant has designed thick-top thin pressure fingers 252, and has performed service life tests on the pressure fingers 252 of the two structures (i.e., continuously applying reciprocating pressure to the tops of the pressure fingers 252 until the roots of the pressure fingers are broken), respectively, to obtain that the thick-top thin pressure fingers 252 have a longer service life than the equal-width pressure fingers 252.

As for the positioning arrangement, as shown in fig. 7 to 9, the front and rear sides of the transverse frame 241 are provided with first positioning grooves 2411, and the longitudinal frame 242 is clamped in the first positioning grooves 2411; as shown in fig. 7 to 9 and 13, the upper and lower ends of the arched plate 251 extend out of the positioning convex plate 2511, the upper and lower sides of the cross frame 241 are provided with the second positioning grooves 2412, and the plate spring 25 is installed on the cross frame 241 by extending into the second positioning grooves 2412 through the positioning convex plate 2511; as shown in fig. 7 to 9 and 11, a third positioning groove 231 is formed on the outer side of the finger piece 23, and the plate spring 25 is disposed in the third positioning groove 231. The first positioning groove 2411 is provided so that the holder 24 has a stable and reliable frame structure, the positioning boss 2511 and the second positioning groove 2412 cooperate to restrict the displacement of the leaf spring 25 in all directions, and the leaf spring 25 and the third positioning groove 231 cooperate to restrict the displacement of the finger piece 23 in the front-rear direction. Generally speaking, the first positioning groove 2411, the second positioning groove 2412, the positioning convex plate 2511 and the third positioning groove 231 are mutually matched, so that the overall structure of the touch knife module 2 is more stable and reliable, and the touch knife module also has the advantage of convenient installation.

As shown in fig. 8, the finger tabs 23 are generally stacked in a parallelogram configuration for contact of the contacts, and therefore the leaf springs 25 are also preferably provided in a corresponding parallelogram configuration.

The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.