CN220710146U - Switch structure - Google Patents

Abstract

The utility model discloses a switch structure, which belongs to the technical field of electrical equipment and comprises a cassette, a bracket, a power supply box and a panel module, wherein the power supply box comprises a box body and a box cover, a first buckling structure is arranged at the front side of the box body, a second buckling structure corresponding to the first buckling structure is arranged at the periphery of the box cover, a clamping part corresponding to the first buckling structure is arranged on a bracket, the box cover is fixed at the front side of the box body through the cooperation of the second buckling structure and the first buckling structure, and the power supply box is fixed on the bracket through the cooperation of the first buckling structure and the clamping part. The first buckle structure is not only used for realizing the fixation between the box cover and the box body, but also used for realizing the fixation between the power supply box and the bracket, and the buckle structure of the power supply box is reasonably simplified on the premise of meeting the installation requirement, so that the structure of the box body can be reasonably simplified, the forming difficulty of the box body is reasonably reduced, and the production cost is reasonably reduced.

Description

Switch structure

Technical Field

The utility model relates to the technical field of electrical equipment, in particular to a switch structure.

Background

In intelligent house ornamentation field, control panel can be used for controlling light, scene, (window) curtain, switch etc. very big convenience of customers' control to household appliances. Prior art CN213752420U discloses an intelligent switch panel, including metal mounting panel, base upper cover, base lower cover, the metal mounting panel is equipped with first card hole, and the base upper cover is equipped with first buckle, and first card hole and first buckle joint are with fixed metal mounting panel and base upper cover, and the base upper cover is equipped with the second card hole, and the base lower cover is equipped with the second buckle, and second card hole and second buckle joint are with unable adjustment base upper cover and base lower cover. Because the base upper cover needs to be fixed with the metal mounting plate and the base lower cover simultaneously, the base upper cover needs to be provided with two clamping structures which are matched with the metal mounting plate and the base lower cover respectively simultaneously, the structure of the base upper cover is complex, the molding difficulty of the base upper cover is large, and the reasonable production cost reduction is not facilitated.

Disclosure of Invention

In order to solve the defects and shortcomings in the prior art, the utility model provides the switch structure, wherein the first buckle structure can be matched with the second buckle structure to fix the box body and the box cover, can be matched with the clamping part to fix the power box and the bracket, and can reasonably simplify the structure of the power box, thereby reducing the forming difficulty of the box body and being beneficial to reasonably reducing the production cost.

In order to achieve the technical purpose, the switch structure comprises a cassette, a bracket fixed on the front side of the cassette, a power box fixed on the bracket and positioned in the cassette, and a panel module fixed on the front side of the bracket and electrically connected with the power box, wherein the power box comprises a box body with an open front side and a box cover fixed on the front side of the box body, a first fastening structure is arranged on the front side of the box body, a second fastening structure corresponding to the first fastening structure is arranged on the periphery of the box cover, a fastening part corresponding to the first fastening structure is arranged on the bracket, the box cover is fixed on the front side of the box body through the cooperation of the second fastening structure and the first fastening structure, and the power box is fixed on the bracket through the cooperation of the first fastening structure and the fastening part.

Preferably, the first buckle structure comprises a first front buckle provided with a first clamping groove, the second buckle structure comprises a second buckle corresponding to the first front buckle and matched with the first clamping groove, and the second buckle is mutually clamped with the first front buckle through the first clamping groove.

Preferably, the first fastening structure comprises a fastening hole which is arranged at the first front fastening position and communicated with the first fastening groove, the second fastening structure comprises a fastening block which protrudes outwards from the second fastening and is matched with the fastening hole, and the fastening block is embedded into the first front fastening through the fastening hole.

Preferably, the bracket is provided with a stop block which is positioned behind the clamping block and abuts against the clamping block; and/or, the clamping block is perpendicularly outwards protruded relative to the second clamping buckle.

Preferably, the first fastening structure includes a first rear fastener disposed on an outer wall of the box body and located behind the first front fastener, and the fastening portion of the bracket includes a front fastening slot matched with the first front fastener and a rear fastening slot matched with the first rear fastener.

Preferably, the first buckle structure comprises a cantilever integrally formed with the box body, and the first rear buckle is arranged on the cantilever and protrudes outwards relative to the outer wall of the box body.

Preferably, the support is provided with a convex rib positioned at the periphery of the power supply box, the front clamping groove is formed in the front side of the convex rib, and the rear clamping groove is formed in the rear side of the convex rib.

Preferably, the power supply boxes are provided with at least two, the brackets are provided with mounting holes which are consistent in number with the power supply boxes and distributed at intervals, and each power supply box is respectively inserted into each mounting hole; or, the power supply boxes are provided with at least two, the bracket is provided with a mounting hole, and each power supply box is inserted in the mounting hole side by side.

Preferably, the panel module comprises a mounting frame, and a clamping and matching structure is arranged between the mounting frame and the bracket; and/or the panel module comprises a mounting frame, and a magnetic attraction matching structure is arranged between the mounting frame and the bracket.

Preferably, the panel module comprises an operation panel arranged on the front side of the mounting frame, a pin is arranged on the rear side of the operation panel, an electric contact corresponding to the pin is arranged on the front side of the power box, and the pin abuts against the electric contact to enable the operation panel to be electrically connected to the power box.

After the technical scheme is adopted, the utility model has the following advantages:

1. according to the switch structure provided by the utility model, the box body of the power box is provided with the first buckling structure, the box cover of the power box is provided with the second buckling structure, the support is provided with the buckling part, the box cover is fixed on the front side of the box body through the cooperation of the second buckling structure and the first buckling structure, and the power box is fixed on the support through the cooperation of the first buckling structure and the buckling part. The first buckle structure is not only used for realizing the fixation between the box cover and the box body, but also used for realizing the fixation between the power supply box and the bracket, and reasonably simplifies the buckle structure of the power supply box on the premise of meeting the installation requirement, can reasonably simplify the structure of the box body, is favorable for reasonably reducing the molding difficulty of the box body, and is favorable for reasonably reducing the production cost.

2. The first buckle structure is including the first buckle that is equipped with the draw-in groove, and the second buckle structure includes the second buckle with draw-in groove complex, and the second buckle passes through draw-in groove and the mutual block of buckle before first, makes the lid install in the front side of box body, rationally sets up the concrete structure of first buckle structure and second buckle structure, is favorable to reducing the assembly degree of difficulty between lid and the box body.

3. The first front buckle department sets up the draw-in hole, and the second buckle sets up outwards convex fixture block, and the fixture block inserts in the draw-in hole and makes the lid receive the positioning action, makes the lid can be fixed in the front side of box body, avoids the lid to rock the condition around taking place for the box body when receiving external force, improves the assembly stability between lid and the box body.

4. The support sets up the backstop piece that is located the fixture block rear, and the fixture block is contradicted with the backstop piece, makes the fixture block receive the positioning action through the backstop piece, can further improve the structural stability of lid. The fixture block is for the perpendicular outwards protrusion of second buckle, rationally sets up the mutual positional relationship of fixture block and second buckle, rationally reduces the cooperation degree of difficulty of fixture block and draw-in hole when reducing the fixture block shaping degree of difficulty.

5. The first buckle structure is including being located the first back buckle at buckle rear before first, and the block portion includes preceding block groove and back block groove, and first preceding buckle is mutually supported with preceding block groove, and first back buckle is mutually supported with back block groove, makes the power pack can be fixed in on the support through the cooperation in buckle and front and back block groove around, rationally sets up the concrete structure of first buckle structure and block portion, rationally reduces the assembly degree of difficulty between power pack and the support when satisfying the assembly requirement between power pack and the support.

6. The first rear buckle is arranged on the cantilever of the box body and protrudes outwards relative to the outer wall of the box body, and the cantilever can enable the first rear buckle to elastically deviate during assembly, so that the first buckle structure and the clamping part can be smoothly matched in place, and meanwhile, the situation that the first rear buckle breaks due to stress during assembly is avoided.

7. The support sets up the protruding muscle that is located the power pack periphery, can suitably increase the cooperation area between power pack and the support through protruding muscle, is favorable to rationally improving the structural stability of power pack installation on the support. The front clamping groove is arranged on the front side of the convex rib, the rear clamping groove is arranged on the rear side of the convex rib, and the distribution positions of the front clamping groove and the rear clamping groove are reasonably arranged, so that the clamping part can be smoothly matched with the first clamping structure.

8. The mounting bracket can be installed on the front side of the bracket through the clamping fit structure, and also can be installed on the front side of the bracket through the magnetic attraction fit structure, so that the connection structure between the mounting bracket and the bracket is reasonably arranged, and the assembly difficulty is reasonably reduced while the assembly requirement is met.

9. The operation panel is electrically connected with the power supply box through the cooperation of the pin header and the electric contact, so that the stability of electric connection can be ensured while the difficulty of electric connection between the operation panel and the power supply box is reasonably reduced.

Drawings

FIG. 1 is a front side view of a switch structure according to an embodiment;

FIG. 2 is a rear side view of a switch structure according to an embodiment;

FIG. 3 is an exploded view of a switch structure according to an embodiment;

FIG. 4 is an enlarged view of FIG. 3 at A;

FIG. 5 is a block diagram of a power supply box in a switch structure according to an embodiment;

FIG. 6 is an exploded view of a power supply box in a switch structure according to an embodiment;

FIG. 7 is a block diagram of a bracket in a switch structure according to an embodiment;

FIG. 8 is a rear side view of a panel module in a switch structure according to an embodiment;

fig. 9 is a vertical cross-sectional view of a power box and a panel assembled together in a switch structure according to an embodiment.

In the figure, 1-bracket, 11-mounting hole, 12-front clamping groove, 13-rear clamping groove, 14-convex rib, 15-groove, 16-stop block, 17-positioning groove, 18-fixing hole, 2-power box, 21-box body, 211-first front buckle, 212-clamping groove, 213-clamping hole, 214-first rear buckle, 215-cantilever, 22-box cover, 221-second buckle, 222-avoidance groove, 223-clamping block, 224-inclined plane, 225-lug, 23-electric contact, 3-panel module, 31-mounting bracket, 311-concave cavity, 312-bulge, 313-avoidance hole and 32-operation panel.

Detailed Description

The utility model will be further described with reference to the drawings and the specific examples. It is to be understood that the terms "upper," "lower," "left," "right," "longitudinal," "transverse," "inner," "outer," "vertical," "horizontal," "top," "bottom," and the like, as used herein, are merely based on the orientation or positional relationship shown in the drawings and are merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the devices/elements referred to must have or be configured and operated in a particular orientation and therefore should not be construed as limiting the utility model.

Example 1

Referring to fig. 1 to 9, the switch structure provided by the utility model comprises a cassette (not shown in the drawings), a bracket 1 fixed on the front side of the cassette, a power box 2 fixed on the bracket 1 and positioned in the cassette, and a panel module 3 fixed on the front side of the bracket 1 and electrically connected to the power box 2, wherein the power box 2 comprises a box body 21 with an open front side and a box cover 22 fixed on the front side of the box body 21, the front side of the box body 21 is provided with a first fastening structure, the periphery of the box cover 22 is provided with a second fastening structure corresponding to the first fastening structure, the bracket 1 is provided with a fastening part corresponding to the first fastening structure, the box cover 22 is fixed on the front side of the box body 21 through the cooperation of the second fastening structure and the first fastening structure, and the power box 2 is fixed on the bracket 1 through the cooperation of the first fastening structure and the fastening part.

The first buckle structure is not only used for realizing the fixation between the box cover 22 and the box body 21, but also used for realizing the fixation between the power box 2 and the bracket 1, and reasonably simplifies the buckle structure of the power box 2 on the premise of meeting the installation requirement, can reasonably simplify the structure of the box body 21, is favorable for reasonably reducing the molding difficulty of the box body 21, and is favorable for reasonably reducing the production cost.

Referring to fig. 1, 2 and 3, in this embodiment, at least two power supply boxes 2 are provided, the bracket 1 is provided with mounting holes 11 which are consistent in number with the power supply boxes 2 and distributed at intervals, and each power supply box 2 is respectively inserted into each mounting hole 11. Specifically, the power supply boxes 2 are three, the bracket 1 is provided with three mounting holes 11 distributed at intervals along the length direction, and each power supply box 2 is inserted into the corresponding mounting hole 11. It will be appreciated that the power supply boxes 2 may be arranged in other reasonable numbers, such as two, four, etc., and accordingly, the number of the mounting holes 11 on the bracket 1 is consistent with the number of the power supply boxes 2 and is distributed at intervals along the length direction of the bracket 1.

Referring to fig. 5 and 6, in this embodiment, the first fastening structure includes a first front fastening 211 provided with a fastening slot 212, the second fastening structure includes a second fastening 221 corresponding to the first front fastening 211 and matched with the fastening slot 212, and the second fastening 221 is fastened to the first front fastening 211 through the fastening slot 212, so that the box cover 22 is mounted on the front side of the box body 21. Specifically, the first front buckle 211 protrudes outwards from the front edge of the box body 21 perpendicular to the outer wall of the box body 21, and the clamping groove 212 is formed in one side of the first front buckle 211 facing the center of the box body 21. The periphery of the box cover 22 is provided with an avoidance groove 222 corresponding to the first front buckle 211, and the second buckle 221 is arranged in the avoidance groove 222.

In order to improve the structural stability of lid 22 installed in box body 21 front side, first buckle structure is including locating the card hole 213 of first preceding buckle 211 department and with draw-in groove 212 intercommunication, the second buckle structure includes from the outside protrusion of second buckle 221 and with card hole 213 complex fixture block 223, fixture block 223 passes through in the first preceding buckle 211 of card hole 213 embedding, make lid 22 receive the positioning action in the fore-and-aft direction through the cooperation of fixture block 223 and card hole 213, make lid 22 can be fixed in the front side of box body 21, avoid lid 22 to rock the condition about the box body 21 emergence when receiving external force. In this embodiment, the clamping block 223 protrudes outwards from the second buckle 221 perpendicularly, in order to reduce the difficulty of inserting the clamping block 223 into the clamping hole 213, the rear side of the clamping block 223 is provided with a slope 224, the clamping block 223 is wedge-shaped through the slope 224, and the wedge-shaped clamping block 223 can be easily inserted into the clamping hole 213 during assembly.

Combining fig. 5 and 6, the first fastening structure includes a first rear fastening 214 disposed on the outer wall of the box body 21 and located behind the first front fastening 211, and combining fig. 4, the fastening portion of the bracket 1 includes a front fastening groove 12 matched with the first front fastening 211 and a rear fastening groove 13 matched with the first rear fastening 214, the first front fastening 211 is mutually matched with the front fastening groove 12, the first rear fastening 214 is mutually matched with the rear fastening groove 13, the power box 2 can be fixed on the bracket 1 through the cooperation of the front fastening and the rear fastening and the front fastening grooves, the specific structure of the first fastening structure and the fastening portion is reasonably set, and the assembly difficulty between the power box 2 and the bracket 1 is reasonably reduced while the assembly requirement between the power box 2 and the bracket 1 is satisfied. Referring to fig. 7, in this embodiment, the bracket 1 is provided with ribs 14 protruding backward around each mounting hole 11, the front engaging groove 12 is disposed at the front edge of the ribs 14, the rear engaging groove 13 is disposed at the rear edge of the ribs 14, and the distribution positions of the front and rear engaging grooves are reasonably set, so that the engaging portion can be smoothly matched with the first fastening structure. The matching area between the power supply box 2 and the bracket 1 can be properly increased through the convex ribs 14, so that the structural stability of the power supply box 2 arranged on the bracket 1 is improved reasonably.

Referring to fig. 6, in order to avoid the situation that the first rear buckle 214 is broken when being stressed during assembly, the first buckle structure includes a cantilever 215 integrally formed with the box 21, and the first rear buckle 214 is disposed on the cantilever 215 and protrudes outwards relative to the outer wall of the box 21. The cantilever 215 can enable the first rear buckle 214 to elastically deviate during assembly, so that the first buckle structure and the clamping part can be smoothly matched in place, and the condition that the first rear buckle 214 is broken due to stress during assembly is avoided.

Referring to fig. 7 and 9, in order to further improve the structural stability of the box cover 22, the inner wall of the mounting hole 11 is provided with a stop block 16 located behind the front engaging groove 12, and when the power box 2 is inserted into the mounting hole 11, the stop block 16 is located at the rear side of the clamping block 223 and abuts against the stop block 16, and the clamping block 223 is positioned by the stop block 16, so that the box cover 22 is prevented from shaking back and forth due to external force. It will be appreciated that the stop 16 may be omitted, and the latch 223 may be positioned against the slot wall of the front engaging slot 12.

Referring to fig. 5, 6 and 7, in this embodiment, the top edge and the bottom edge of the front side of the box body 21 are provided with a plurality of first fastening structures distributed at intervals, and correspondingly, the top edge and the bottom edge of the box cover 22 are provided with second fastening structures corresponding to the first fastening structures, and the top wall and the bottom wall of each mounting hole 11 are provided with fastening parts corresponding to the first fastening structures. In order to improve the stability of the power supply box 2 inserted into the mounting hole 11, the left and right edges of the box cover 22 are provided with protruding blocks 225 which are fixed on the front side of the box body 21 and protrude out of the box body 21, the inner walls of the left and right sides of the mounting hole 11 are provided with grooves 15 matched with the protruding blocks 225, and when the power supply box 2 is mounted in the corresponding mounting hole 11, the protruding blocks 225 are mutually matched with the grooves 15, so that the power supply box 2 is limited. It will be appreciated that the projection 225 may be provided on the outer wall of the case 21, and that the positions of the projection 225 and the recess 15 may be interchanged.

Referring to fig. 3 and 8, the panel module 3 includes a mounting frame 31 and an operation panel 32 disposed on the front side of the mounting frame 31, a clamping and matching structure is disposed between the mounting frame 31 and the bracket 1, and the mounting frame 31 is mounted on the front side of the bracket 1 through the clamping and matching structure. In this embodiment, the rear side of the mounting frame 31 is provided with a concave cavity 311 matched with the support frame 1, the mounting frame 31 is provided with a plurality of protrusions 312 which are distributed along the circumferential interval of the concave cavity 311 and face the center of the mounting frame 31, the edge of the support frame 1 is provided with a positioning groove 17 matched with the protrusions 312, the support frame 1 is embedded into the concave cavity 311 of the rear side of the mounting frame 31, and the protrusions 312 are matched with the positioning groove 17, so that the mounting frame 31 can be fixedly assembled on the front side of the support frame 1. It will be appreciated that the snap fit arrangement may be provided in other reasonable ways.

Referring to fig. 5 and 8, a pin header is disposed at the rear side of the operation panel 32, an electrical contact 23 extending out of the power box 2 is disposed at the front side of the power box 2, a hole 313 corresponding to the electrical contact 23 is disposed on the mounting frame 31, the electrical contact 23 passes through the hole 313 and abuts against the pin header, and the operation panel 32 is electrically connected to the power box 2.

Referring to fig. 7, the cassette is embedded in a fixture such as a wall, the bracket 1 is fixed to the front side of the cassette by screws, the bracket 1 is provided with fixing holes 18 through which the screws pass, the cassette is provided with fastening holes through which the screws are screwed, and the screws pass through the fixing holes 18 and are screwed into the fastening holes to fix the bracket 1 to the front side of the cassette.

During installation, the cassette is pre-buried in a wall or other fixed objects, then the bracket 1 is fixed on the front side of the cassette, then the power supply box 2 is inserted into the installation hole 11 of the bracket 1, the first front buckle 211 is matched with the front clamping groove 12, the first rear buckle 214 is matched with the rear clamping groove 13, the lug 225 is matched with the groove 15, and finally the panel module 3 is buckled on the front side of the bracket 1.

The operation panel 32 may be used for controlling electrical equipment such as a lamp and an air conditioner, and of course, the operation panel 32 is not limited to being used for realizing intelligent control of the electrical equipment, and the operation panel 32 may be a push switch, a jack panel into which a plug is inserted, or the like.

When the operation panel 32 adopts weak current, a transformation module for transforming strong current into weak current is disposed in the power box 2, and the specific structure of the transformation module can refer to the prior art, which is not described herein.

When the operation panel 32 is used for implementing intelligent control on the electrical equipment, a control module is disposed in the power supply box 2, the control module can be used for implementing on-off control, power control and the like of the electrical equipment, and the specific structure of the control module can refer to the prior art, which is not described herein.

It will be appreciated that the protrusions 312 may be provided only at the top wall of the cavity 311, or may be provided at both the top wall and the bottom wall of the cavity 311.

Example two

In the present embodiment, the number of the power supply boxes 2 is at least two, and the bracket 1 is provided with only one mounting hole 11, and each power supply box 2 is inserted in the mounting hole 11 side by side.

It is understood that the number of the power supply boxes 2 may be set to two, three, etc. reasonable numbers.

It will be appreciated that each power supply box 2 may be inserted into the mounting hole 11 of the bracket 1 after one power supply module is formed in advance.

Other structures of the second embodiment are the same as those of the first embodiment, and will not be described in detail here.

Example III

In this embodiment, a magnetic attraction matching structure is arranged between the mounting frame 31 and the bracket 1, and the mounting frame 31 is arranged on the front side of the bracket 1 through the magnetic attraction matching structure. Specifically, the magnet is arranged in the bracket 1, the mounting frame 31 is provided with a ferromagnetic block corresponding to the magnet, and the mounting frame 31 is positioned and mounted on the front side of the bracket 1 through the magnetic attraction between the ferromagnetic block and the magnet.

It can be understood that only the clamping and matching structure in the first embodiment or the magnetic attraction and matching structure in the third embodiment may be provided between the mounting frame 31 and the bracket 1, or the clamping and matching structure in the first embodiment and the magnetic attraction and matching structure in the third embodiment may be provided at the same time.

It will be appreciated that the positions of the ferromagnetic blocks and magnets may be interchanged.

It will be appreciated that the third embodiment may be combined with the second embodiment.

In addition to the above preferred embodiments, the present utility model has other embodiments, and various changes and modifications may be made by those skilled in the art without departing from the spirit of the utility model, which shall fall within the scope of the utility model as defined in the appended claims.

Claims (10)

1. The utility model provides a switch structure, includes the magazine, is fixed in the support of magazine front side, is fixed in the power pack of just being located the magazine on the support, is fixed in the support front side and the panel module of electricity in the power pack, its characterized in that, the power pack includes the open box body of front side and is fixed in the lid of box body front side, and the front side of box body is equipped with first buckle structure, and the week of lid is equipped with the second buckle structure that corresponds with first buckle structure, and the support is equipped with the block portion that corresponds with first buckle structure, and the lid is fixed in the front side of box body through the cooperation of second buckle structure and first buckle structure, and the power pack is fixed in on the support through the cooperation of first buckle structure and block portion.

2. The switch structure of claim 1, wherein the first latch structure includes a first front latch having a slot, and the second latch structure includes a second latch corresponding to the first front latch and engaged with the slot, the second latch being engaged with the first front latch via the slot.

3. The switch structure of claim 2, wherein the first fastening structure includes a fastening hole disposed at the first front fastening part and communicated with the fastening slot, and the second fastening structure includes a fastening block protruding outwards from the second fastening part and cooperating with the fastening hole, and the fastening block is embedded into the first front fastening part through the fastening hole.

4. A switch structure according to claim 3, wherein the bracket is provided with a stop located behind the latch and against the latch; and/or, the clamping block is perpendicularly outwards protruded relative to the second clamping buckle.

5. The switch structure of claim 2, wherein the first latch structure includes a first rear latch disposed on an outer wall of the case and located behind the first front latch, and the latch portion of the bracket includes a front latch slot for mating with the first front latch and a rear latch slot for mating with the first rear latch.

6. The switch structure of claim 5, wherein the first latch structure comprises a cantilever integrally formed with the housing, and the first rear latch is disposed on the cantilever and projects outwardly relative to the housing outer wall.

7. The switch structure of claim 5, wherein the bracket is provided with a rib at the outer periphery of the power box, the front engaging groove is provided at the front side of the rib, and the rear engaging groove is provided at the rear side of the rib.

8. The switch structure according to claim 1, wherein the power supply boxes are provided with at least two, the brackets are provided with mounting holes which are consistent in number with the power supply boxes and are distributed at intervals, and each power supply box is respectively inserted into each mounting hole; or, the power supply boxes are provided with at least two, the bracket is provided with a mounting hole, and each power supply box is inserted in the mounting hole side by side.

9. The switch structure of claim 1, wherein the panel module comprises a mounting frame, and a clamping and matching structure is arranged between the mounting frame and the bracket; and/or the panel module comprises a mounting frame, and a magnetic attraction matching structure is arranged between the mounting frame and the bracket.

10. The switch structure of claim 9, wherein the panel module includes an operation panel disposed on a front side of the mounting frame, a pin header is disposed on a rear side of the operation panel, an electrical contact corresponding to the pin header is disposed on a front side of the power box, and the pin header abuts against the electrical contact to electrically connect the operation panel to the power box.