CN221041576U - Wiring structure - Google Patents

Abstract

The utility model belongs to the technical field of low-voltage electrical appliances, and discloses a wiring structure, which comprises a base and a wiring seat, wherein the base is provided with a slot along a first direction, the slot comprises a limiting surface which is oppositely arranged along a second direction, a limiting block is arranged on the limiting surface, and the limiting block comprises a protruding part; the connection terminal comprises a limiting groove which is arranged relatively along the second direction, a clamping groove which is arranged corresponding to the protruding portion is arranged on the inner surface of the limiting groove, the connection terminal can be detachably inserted into the slot, two limiting faces are clamped and form limiting along the second direction, the limiting block is inserted into the corresponding limiting groove to form limiting along the third direction, and the protruding portion and the corresponding clamping groove are clamped to form limiting along the first direction. The wiring structure provided by the utility model can effectively prevent the wiring seat from falling off from the base, and is convenient to assemble and disassemble.

Description

Wiring structure

Technical Field

The utility model relates to the technical field of piezoelectric devices, in particular to a wiring structure.

Background

At present, in order to meet various wiring requirements, such as wiring requirements of board rear wiring, plug-in wiring and the like, a wiring terminal structure of the plastic-case circuit breaker generally adopts a split type structural design with the circuit breaker.

In the prior art, the wiring terminal structure comprises a wiring seat, the wiring seat is arranged below a base of the circuit breaker, a wiring screw is connected with the wiring seat above the base, and the wiring seat is generally fixed with the base through tight fit, but the installation mode has higher requirements on the production process. If the wiring seat is not tightly matched with the base, the wiring seat can fall off from the lower part of the base and even be lost; if the wire holder is too tightly matched with the base, the base can be cracked when the wire holder is knocked off, and the rejection rate is higher.

Disclosure of utility model

The utility model aims to provide a wiring structure which can effectively prevent a wiring seat from falling off from a base and is convenient to assemble and disassemble with the base.

To achieve the purpose, the utility model adopts the following technical scheme:

Provided is a wiring structure including:

The base is provided with a slot along a first direction, the slot comprises limiting surfaces which are oppositely arranged along a second direction, a limiting block is arranged on each limiting surface, and each limiting block comprises a protruding part;

The wire holder comprises a limit groove which is oppositely arranged along a second direction, the inner surface of the limit groove is provided with a clamping groove which is correspondingly arranged with the protruding part, the wire holder is detachably inserted into the slot, the two limit faces are clamped with the wire holder and form a limit along the second direction, the limit block is inserted into the corresponding limit groove to form a limit along a third direction, and the protruding part and the corresponding clamping groove are clamped with each other to form a limit along the first direction.

Optionally, at least one of two side surfaces of stopper along the relative setting of third direction is echelonment, including first face, second face and set up in first face with the ladder face between the second face, the second face is located along first direction the first face is away from slot tank bottom one side, the second face with form between the ladder face the bellying.

Optionally, the method further comprises:

The connecting plate is arranged in the base and is positioned at the top of the wire holder along the third direction;

The wire holder is provided with a holding groove along the top of the third direction, and the holding groove is internally provided with the fastening nut;

And the fastening screw penetrates through the connecting plate and is in threaded connection with the fastening nut.

Optionally, the connector further comprises a heat dissipation plate, a mounting cavity is formed between the connecting plate and the wire holder, the heat dissipation plate is arranged in the mounting cavity, and the fastening screw penetrates through the connecting plate and the heat dissipation plate and is in threaded connection with the fastening nut.

Optionally, ribs extending along the third direction are arranged on the inner side wall of the accommodating groove.

Optionally, the method further comprises:

The connecting plate is arranged in the base, is positioned at the top of the wire holder along the third direction and is provided with a mounting cavity with the wire holder;

The heat dissipation plate is arranged in the mounting cavity;

and the fastening screw penetrates through the connecting plate and is in threaded connection with the heat dissipation plate.

Optionally, the top of connection terminal is provided with the groove of stepping down, the heating panel seted up can with fastening screw threaded connection's screw hole, just the heating panel in screw hole department is provided with the turn-ups, the turn-ups peg graft in the inslot of stepping down.

Optionally, a dimension H of the mounting cavity along the third direction is greater than a thickness H of the heat dissipation plate along the third direction.

Optionally, the wire holder is provided with a chamfer or a rounded corner at an end opening of the limit groove facing the slot bottom along the first direction, and/or

And one end of the protruding part, which is away from the slot bottom in the first direction, is provided with a chamfer surface or a rounded corner surface.

Optionally, the base is provided with a plurality of inter-electrode separators at intervals along the second direction, and an inter-electrode cavity is formed between adjacent inter-electrode separators;

The base is provided with slots which are communicated with the interelectrode cavities in a one-to-one correspondence manner along the two ends of the first direction, and each slot is internally inserted with the wire holder.

The beneficial effects are that:

According to the wiring structure provided by the utility model, the wiring seat is inserted into the slot of the base along the first direction, the two limiting faces are clamped with the wiring seat, the limiting blocks are inserted into the corresponding limiting grooves, the protruding parts are clamped with the corresponding clamping grooves, further, the limitation of the base on the wiring seat along the first direction, the second direction and the third direction is realized, the falling off of the wiring seat on the base is effectively prevented, and the mounting and the dismounting are convenient.

Drawings

Fig. 1 is a schematic structural diagram of a wiring structure according to a first embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a wire holder according to a first embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a connection base before plugging with a base according to a first embodiment of the present utility model;

FIG. 4 is a partial cross-sectional view of one implementation of a wiring structure provided in accordance with an embodiment of the present utility model;

FIG. 5 is a partial cross-sectional view of another implementation of a wiring structure provided in accordance with an embodiment of the present utility model;

FIG. 6 is an enlarged schematic view of the structure shown in FIG. 5 according to an embodiment of the present utility model;

FIG. 7 is a partial cross-sectional view of one implementation of a wiring structure provided in accordance with a second embodiment of the present utility model;

Fig. 8 is a partial cross-sectional view of another embodiment of a wiring structure provided in accordance with the second embodiment of the present utility model.

In the figure:

100. a base; 101. a slot; 1011. a limiting surface; 102. a groove; 110. a limiting block; 1101. a first face; 1102. a second face; 1103. a step surface; 111. a boss; 120. a connecting column; 130. a boss; 140. an interelectrode separator;

200. A wire holder; 201. a limit groove; 202. a clamping groove; 203. a receiving groove; 2031. ribs; 204. a relief groove; 205. a heat dissipation cavity; 206. a mounting cavity; 210. surrounding edges; 220. a baffle;

300. a coupling plate;

400. a fastening nut;

500. A fastening screw;

600. A gasket;

700. A heat dissipation plate; 701. perforating; 702. a threaded hole; 710. and (5) flanging.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Example 1

Referring to fig. 1 to 3, the present embodiment provides a wiring structure including a base 100 and a wire holder 200.

The base 100 is provided with a slot 101 along a first direction, the slot 101 comprises a limiting surface 1011 oppositely arranged along a second direction, a limiting block 110 is arranged on the limiting surface 1011, and the limiting block 110 comprises a protruding part 111; the wire holder 200 includes the spacing groove 201 that sets up relatively along the second direction, and the internal surface of spacing groove 201 is provided with the draw-in groove 202 that corresponds the setting with bellying 111, and wire holder 200 can dismantle grafting in slot 101, and two spacing faces 1011 are the centre gripping form to wire holder 200 and form spacing along the second direction, and stopper 110 grafting forms the spacing along the third direction in corresponding spacing groove 201, and bellying 111 and the spacing along the first direction of corresponding draw-in groove 202 joint formation.

In fig. 1, the direction a may be a first direction, the first direction may be a length direction of the base 100, the direction b may be a second direction, the second direction may be a width direction of the base 100, the direction c may be a third direction, and the third direction may be a height direction of the base 100.

In this embodiment, the wire holder 200 is inserted into the slot 101 of the base 100 along the first direction, the two limiting surfaces 1011 clamp the wire holder 200, the limiting block 110 is inserted into the corresponding limiting groove 201, and the protruding portion 111 is clamped with the corresponding clamping groove 202, so that the base 100 is limited along the first direction, the second direction and the third direction to the wire holder 200, the wire holder 200 is effectively prevented from falling off the base 100, and the disassembly and assembly are convenient.

In one possible embodiment, at least one of two side surfaces of the stopper 110 opposite to each other along the third direction is stepped, and includes a first surface 1101, a second surface 1102, and a stepped surface 1103 disposed between the first surface 1101 and the second surface 1102, where the second surface 1102 is located on a side of the first surface 1101 facing away from the slot 101 bottom along the first direction, and a protrusion 111 is formed between the second surface 1102 and the stepped surface 1103. In order to stabilize the connection between the protruding portion 111 and the clamping groove 202, a step adapted to the limiting block 110 is formed between the clamping groove 202 and the limiting groove 201. In this embodiment, when the wire holder 200 is inserted into the slot 101 of the base 100, first, the second surface 1102 abuts against the inner surface of the limiting slot 201, which can be understood as that the second surface 1102 is in interference fit with the inner surface of the limiting slot 201; then, the second surface 1102 slides into the card slot 202, at this time, the fit between the second surface 1102 and the inner surface of the card slot 202 is a clearance fit, and the stepped surface 1103 forms a limit with the card slot 202, so as to prevent the wire holder 200 from being separated from the base 100 along the first direction. Illustratively, the base 100 and the wire holder 200 have a certain elasticity, so as to facilitate assembly and disassembly.

Illustratively, the upper side of the stopper 110 along the third direction is stepped.

Illustratively, to facilitate removal of the connector holder 200 from the base 100, the first surface 1101 is at an angle α of 90 ° or more from the stepped surface 1103.

Illustratively, the wire holder 200 is made of an electrically insulating material to prevent the wire structure from being electrically leaked to create a hazard.

In a possible embodiment, the terminal block 200 is provided with a chamfer or a rounded corner at an end opening of the limit groove 201 facing the bottom of the slot 101 along the first direction, or one end of the protrusion 111 facing away from the bottom of the slot 101 along the first direction, or the terminal block 200 is provided with a chamfer or a rounded corner at an end opening of the limit groove 201 facing the bottom of the slot 101 along the first direction, and one end of the protrusion 111 facing away from the bottom of the slot 101 along the first direction, so as to facilitate the insertion of the terminal block 200 into the slot 101 of the base 100.

In the present embodiment, referring to fig. 1 to 4, the wiring structure further includes a coupling plate 300, a fastening nut 400, and a fastening screw 500. The connecting plate 300 is disposed in the base 100, and the connecting plate 300 is located at the top of the wire holder 200 along the third direction; the top of the wire holder 200 along the third direction is provided with an accommodating groove 203, and a fastening nut 400 is arranged in the accommodating groove 203; the fastening screw 500 penetrates the coupling plate 300 and is in threaded connection with the fastening nut 400, and the fastening screw 500 is matched with the fastening nut 400, so that the coupling plate 300 and the wire holder 200 form position fixation along the first direction, and the wire holder 200 is further effectively prevented from being separated from the base 100 along the first direction.

Specifically, the base 100 and the coupling plate 300 may be coupled by screw fastening. Illustratively, at least one connection post 120 is provided on the base 100, and the link plate 300 may be supported by the connection post 120 to limit the link plate 300. The screw may be threaded through the connection post 120 and the coupling plate 300, or the screw may be threaded through the coupling plate 300 and connected with the connection post 120 or a nut. Illustratively, the slot 101 is provided with a boss 130 at the bottom thereof so that a screw may be inserted through the coupling plate 300 and be screwed with the base 100 at the top in the third direction in a region where the boss 130 is provided at the slot 101 at the bottom thereof, wherein the wire holder 200 is provided with a first recess matched with the boss 130.

Specifically, at least one receiving groove 203, for example, two receiving grooves 203 are formed on the wire holder 200, one fastening nut 400 is respectively disposed in each receiving groove 203, and the fastening nuts 400 are in one-to-one correspondence with the fastening screws 500.

Specifically, the bottom of the accommodating groove 203 is provided with a relief groove 204 capable of relieving the fastening screw 500, so as to prevent the fastening screw 500 from interfering with the wire holder 200.

Illustratively, in order to secure the fastening between the fastening screw 500 and the fastening nut 400 stably, a washer 600 is provided between the head of the fastening screw 500 and the coupling plate 300. Such as flat washers 600 and/or spring washers 600.

In one possible embodiment, as shown in fig. 2, ribs 2031 extending in the third direction are provided on the inner side wall of the receiving groove 203, and the fastening nut 400 is tightly fitted with the fastening nut 400 by the ribs 2031 to prevent the fastening nut 400 from being separated from the receiving groove 203. Illustratively, the cross-sections of the fastening nut 400 and the receiving groove 203 are polygonal, such as hexagonal, wherein at least one set of diagonal corners of the receiving groove 203 are respectively provided with ribs 2031, and the fastening nut 400 is clamped by the ribs 2031 to prevent the fastening nut 400 from being separated from the receiving groove 203.

In one possible embodiment, as shown in fig. 2 and 3, a peripheral edge 210 is disposed on a bottom peripheral side of the wire holder 200, and a groove 102 capable of receiving the peripheral edge 210 is disposed on a bottom of the base 100, so as to ensure tightness between the wire holder 200 and the base 100. The limiting groove 201 may extend to the peripheral edge 210 along the second direction.

In one possible embodiment, as shown in fig. 2, the top of the wire holder 200 along the third direction is provided with a plurality of heat dissipation cavities 205, so as to provide a heat dissipation space for the connection plate 300, and effectively reduce the temperature of the connection plate 300.

In one possible embodiment, as shown in fig. 5, the connection structure further includes a heat dissipation plate 700, a mounting cavity 206 is formed between the connection plate 300 and the connection seat 200, the heat dissipation plate 700 is disposed in the mounting cavity 206, and the fastening screw 500 penetrates the connection plate 300 and the heat dissipation plate 700 and is in threaded connection with the fastening nut 400, so that the heat dissipation plate 700 is attached to the connection plate 300, and the connection plate 300 reduces its temperature by contacting with the heat dissipation plate 700 to exchange heat. Wherein the heat dissipation plate 700 is provided with a second recess matching the boss 130.

Specifically, the heat sink 700 is provided with a through hole 701 through which the fastening screw 500 is inserted. Illustratively, taking two accommodating grooves 203 formed on the wire holder 200 as an example, two through holes 701 for the fastening screws 500 to pass through are formed on the heat dissipation plate 700.

Specifically, the top of the wire holder 200 along the third direction is provided with a flange, the flange encloses a U-shaped limiting space, the opening of the U-shaped limiting space faces the bottom of the slot 101 along the first direction, and the baffle 220 is matched with the bottom surface of the slot 101 and the connecting plate 300, so that the heat dissipation plate 700 can be effectively prevented from being separated from the wire holder 200. Illustratively, the flange may extend to the hitch plate 300, i.e., the flange may surround the hitch plate 300. Illustratively, the hitch plate 300 may be disposed to protrude from the flange in the third direction to prevent the flange from interfering with the wiring.

In one possible embodiment, as shown in fig. 5 and 6, the dimension H of the mounting cavity 206 in the third direction is greater than the thickness H of the heat dissipation plate 700 in the third direction, which effectively prevents the formation of positional interference between the coupling plate 300 and the heat dissipation plate 700, i.e., prevents the coupling plate 300 from tilting or excessively pressing the heat dissipation plate 700. In this embodiment, when the fastening screw 500 is tightened, the fastening screw 500 pushes the heat dissipation plate 700, so that the heat dissipation plate 700 moves toward the connection plate 300 along the third direction until the heat dissipation plate 700 is attached, i.e. a gap is formed between the heat dissipation plate 700 and the wire holder 200, which is beneficial to heat dissipation.

Illustratively, a side of the heat dissipation plate 700 facing the wire holder 200 in the third direction may be embossed (not shown), or a plurality of grid sheets (not shown) may be disposed at intervals in the third direction on a side of the heat dissipation plate 700 facing the wire holder 200 to increase a heat dissipation area.

Illustratively, the material of the connection plate 300 may be a material with good electrical conductivity, such as metallic copper.

Illustratively, the heat dissipation plate 700 is made of a material with high thermal conductivity and high specific heat capacity, such as metallic aluminum, aluminum alloy, with good thermal conductivity and low cost, and with a specific heat capacity much larger than the coupling plate 300, and with a slow temperature rise, can effectively conduct the temperature of the coupling plate 300, and reduce the temperature rise of the coupling plate 300.

In this embodiment, referring to fig. 1, a plurality of inter-electrode spacers 140 are disposed on the base 100 along the second direction at intervals, inter-electrode cavities are formed between adjacent inter-electrode spacers 140, slots 101 in one-to-one correspondence with the inter-electrode cavities are respectively disposed at two ends of the base 100 along the first direction, and a wire holder 200 is inserted into each slot 101. Wherein, two connecting plates 300 are respectively arranged in each interelectrode cavity, so that the wiring structure can be applied to multiphase wiring, and the applicability is improved. Illustratively, the number of inter-electrode spacers 140 may be two, three, four, or five, with one, two, three, or four corresponding inter-electrode cavities, respectively. Of course, the inter-electrode separator 140 may be provided in other numbers, and the present application is not limited thereto.

Example two

The heat dissipating plate 700 in the wiring structure provided in this embodiment is different from the first embodiment, in this embodiment, referring to fig. 7, the through hole 701 of the heat dissipating plate 700 is a threaded hole 702 that can be screwed with the fastening screw 500, and the fastening nut 400 is not provided in the wiring structure in this embodiment. Specifically, the heat dissipation plate 700 is installed in the installation cavity 206 formed between the connection plate 300 and the wire holder 200, and the fastening screw 500 penetrates through the connection plate 300 and is in threaded connection with the heat dissipation plate 700, it can be understood that the fastening screw 500 directly pulls the heat dissipation plate 700 toward the connection plate 300 and is attached to the connection plate 300, and the forming structure of the wire holder 200 can be effectively simplified, that is, the top of the wire holder 200 along the third direction is directly provided with the relief groove 204 without the accommodating groove 203. Of course, the receiving groove 203 of the wire holder 200 may remain, and when the screw hole 702 of the heat radiating plate 700 damages the slider, the fastening nut 400 may be installed to improve applicability.

In a possible embodiment, as shown in fig. 8, a flange 710 is disposed at the position of the heat dissipation plate 700 at the threaded hole 702, and the flange 710 is inserted into the relief groove 204, so that the heat dissipation plate 700 is effectively prevented from sliding with the fastening screw 500 under the condition of being thinner, and the connection between the fastening screw 500 and the heat dissipation plate 700 is effectively ensured to be stable. In the present embodiment, the flange 710 may be attached to the yielding groove 204, so that a position between the connecting plate 300 and the wire holder 200 along the first direction is fixed, and the wire holder 200 is more effectively prevented from being separated from the base 100 along the first direction.

Other structures of the wiring structure provided in this embodiment are the same as those of the first embodiment, and detailed descriptions thereof are omitted.

It can be understood that the wiring structures provided in the first embodiment and the second embodiment are applicable to not only circuit breakers but also other low-voltage appliances, and the present application is not limited thereto.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. A wiring structure, characterized by comprising:

The base (100) is provided with a slot (101) along a first direction, the slot (101) comprises limiting surfaces (1011) which are oppositely arranged along a second direction, a limiting block (110) is arranged on the limiting surfaces (1011), and the limiting block (110) comprises a protruding part (111);

The wiring seat (200) comprises limiting grooves (201) which are oppositely arranged along a second direction, clamping grooves (202) which are correspondingly arranged with the protruding portions (111) are formed in the inner surfaces of the limiting grooves (201), the wiring seat (200) is detachably inserted into the slot (101), two limiting surfaces (1011) are clamped with the wiring seat (200) and form limiting along the second direction, the limiting blocks (110) are inserted into the corresponding limiting grooves (201) to form limiting along the third direction, and the protruding portions (111) are clamped with the corresponding clamping grooves (202) to form limiting along the first direction.

2. The connection structure according to claim 1, wherein at least one of two side surfaces of the stopper (110) which are oppositely disposed along the third direction is stepped, and includes a first surface (1101), a second surface (1102), and a stepped surface (1103) disposed between the first surface (1101) and the second surface (1102), the second surface (1102) being located on a side of the first surface (1101) facing away from a bottom of the slot (101) along the first direction, and the protruding portion (111) being formed between the second surface (1102) and the stepped surface (1103).

3. The wiring structure of claim 1, further comprising:

A connection plate (300) arranged in the base (100), wherein the connection plate (300) is positioned at the top of the wire holder (200) along the third direction;

a fastening nut (400), wherein an accommodating groove (203) is formed in the top of the wire holder (200) along the third direction, and the fastening nut (400) is arranged in the accommodating groove (203);

And a fastening screw (500) penetrating the coupling plate (300) and being screwed with the fastening nut (400).

4. A wiring structure according to claim 3, further comprising a heat dissipating plate (700), wherein a mounting cavity (206) is formed between the coupling plate (300) and the wire holder (200), the heat dissipating plate (700) is disposed in the mounting cavity (206), and the fastening screw (500) penetrates through the coupling plate (300) and the heat dissipating plate (700) and is in threaded connection with the fastening nut (400).

5. A wiring structure according to claim 3, characterized in that ribs (2031) extending in the third direction are provided on an inner side wall of the accommodation groove (203).

6. The wiring structure of claim 1, further comprising:

The connecting plate (300) is arranged in the base (100), and the connecting plate (300) is positioned at the top of the wire holder (200) along the third direction and a mounting cavity (206) is formed between the connecting plate and the wire holder (200);

A heat dissipation plate (700) disposed in the installation cavity (206);

And a fastening screw (500) penetrating the coupling plate (300) and screwed with the heat dissipation plate (700).

7. The wiring structure according to claim 6, wherein a relief groove (204) is formed in the top of the wiring seat (200), a threaded hole (702) capable of being in threaded connection with the fastening screw (500) is formed in the heat dissipation plate (700), a flange (710) is formed at the position of the heat dissipation plate (700) at the threaded hole (702), and the flange (710) is inserted into the relief groove (204).

8. The wiring structure according to claim 4 or 6, wherein a dimension H of the mounting cavity (206) in the third direction is larger than a thickness H of the heat dissipation plate (700) in the third direction.

9. The connection structure according to claim 1, wherein the wire holder (200) is provided with chamfer or rounded corner surfaces at the end opening of the limit groove (201) toward the groove bottom of the slot (101) in the first direction, and/or

The protruding portion (111) is provided with a chamfer or a rounded corner along one end of the first direction, which is away from the bottom of the slot (101).

10. The wiring structure according to claim 1, wherein the base (100) is provided with a plurality of inter-electrode spacers (140) at intervals along the second direction, and an inter-electrode cavity is formed between adjacent inter-electrode spacers (140);

The base (100) is provided with slots (101) which are communicated with the interelectrode cavities in a one-to-one correspondence manner along the two ends of the first direction, and each slot (101) is respectively inserted with the wire holder (200).