CN103958982A - Indoor unit of air conditioner - Google Patents

Abstract

The invention provides an indoor unit of an air conditioner. An electrical box (20) of an indoor unit of an air conditioner has a box body (22) for detachably housing a circuit board (21) and a terminal block (24) to which an electric wire (23) is connected. The terminal block (24) is disposed on the front side of the case (22). The insertion port (30) of the electric wire (23) and the connection port (31) of the terminal block (24) are positioned on a straight line. A pair of front and rear holding sections (40, 41) for holding the circuit board (21) are provided in the case (22), the front holding section (40) being movable relative to the circuit board (21), and the rear holding section (41) holding the circuit board (21) so as to be movable. When the front holding portion (40) moves to release the holding of the front side of the circuit board (21), the circuit board (21) is held by the rear holding portion (41) and is in an inclined state. The circuit board (21) can be moved in and out from the front of the case (22) while avoiding the terminal block (24). By facilitating the entry and exit of the circuit board (21) from the electrical box (20), the connection operation of the electric wire (23) to the terminal block (24) is facilitated, and the electrical box is miniaturized.

Description

Indoor unit of air conditioner

technical field

The present invention relates to an indoor unit of an air conditioner in which an electrical box for detachably accommodating a circuit board is built in a housing.

Background technique

The case of the indoor unit of the air conditioner has a fan and a heat exchanger built into it. The fan is disposed below the heat exchanger, and the heat exchanger is arranged to surround the fan. In addition, an electrical box for driving electric components such as a fan and controlling the operation of the air conditioner is provided in the cabinet. The fan and the heat exchanger are arranged in the center of the case in the left-right direction, and the electrical box is arranged outside the fan and the heat exchanger.

The electrical box is provided with a terminal base, and the terminal base is used for connecting cables connected to the outdoor unit, power cables and other wires. The terminal base is disposed on the upper front side of the electrical box. The electric wires are looped from the rear side to the front side in the case, inserted through the insertion port of the electrical box, and connected to the terminal block. In addition, a circuit board for driving electric components is accommodated in the electrical box.

The refrigerant piping of the heat exchanger and the fan motor protrude toward the electrical box. In order to avoid the refrigerant piping of the heat exchanger and the fan motor, the structure of the electrical box becomes complicated. In other words, the circuit board of the electrical box is positioned outside the terminal block to avoid adhesion of moisture. The circuit board is detachably installed in the electrical box, and when the air conditioner breaks down, the circuit board may be detached from the electrical box. At this time, the circuit board enters and exits from the front side of the electrical box. On the other hand, the position of the insertion port of the electrical box cannot be changed due to obstacles such as fan motors. Here, the position of the terminal block may be changed, but the terminal block has to be arranged close to the center so that the terminal block does not interfere with the entry and exit of the circuit board. Therefore, the offset in the left-right direction of the terminal base and the insertion opening is not eliminated.

According to the electrical box described in Patent Document 1, the terminal block is arranged on the front side relative to the circuit board, is arranged near the center in the left-right direction, and is arranged obliquely outward. An insertion port for electric wires is formed in a lower portion of the electrical box, and the insertion port is located outside the terminal block in the left-right direction. Wires are routed obliquely from the insertion port to the terminal block. Thereby, it is not necessary to bend and connect the electric wires, and the connection work becomes easy.

Patent Document 1: Japanese Patent Laid-Open Publication No. 2011-58778

The connection of electric wires becomes easy in the above-mentioned electric box. However, the width of the electrical box in the left-right direction becomes larger, and the storage space of the electrical box in the housing increases.

Contents of the invention

In view of the above problems, an object of the present invention is to provide an indoor unit of an air conditioner equipped with an electric box that not only facilitates the connection work of electric wires to the terminal block, but also has a structure that can realize miniaturization .

In the indoor unit of the air conditioner of the present invention, an electrical box is provided in a cabinet provided with electric components. The electrical box has a box body and a terminal block to which electric wires are connected, and the box houses a circuit board for driving the electric components. It can be assembled and disassembled, and the terminal block is arranged on the front side of the box. At least one pair of holding parts for holding the circuit board is provided on the case, one holding part is movable relative to the circuit board, and the other holding part holds the circuit board in a movable manner.

When one of the holding parts moves, the holding of the circuit board is released. Thereby, the circuit board can be moved. The other holding portion allows the circuit board to move while holding the circuit board. When the circuit board moves in and out, the circuit board moves around the side held by the other holding portion. For example, while the front or rear side of the circuit substrate is still held, the opposite side of the circuit substrate moves. In addition, the other holding part may be made movable. By moving the other holding portion while still holding the circuit board, the circuit board is held movably.

That is, it is preferable that when one holding part moves to release the holding of the circuit board, the circuit board is moved toward a direction different from the front-back direction while still being held by the other holding part, and the circuit board can be moved from the case The state of taking out the body. Here, the terminal block protrudes toward the front of the box and becomes an obstacle when the circuit board is taken in and out. By moving the circuit board in a direction different from the front-rear direction, the circuit board can be moved in and out while avoiding the terminal block positioned at the front. Therefore, the other holding portion only needs to hold the front side or the rear side of the circuit board. In addition, one holding portion holds the opposite side of the circuit board to the other holding portion, or holds both sides or one side of the circuit board in an up-down, left-right direction different from the front-back direction. In addition, one holding portion is not limited to one, but may be two or more.

Preferably, the box has a detachable cover, and the cover restricts movement of the one holding part by abutting against the one holding part. When the cover is removed from the case, the cover is separated from one holding portion. The restriction of the one holding part by the cover is released, and the one holding part is in a movable state.

Preferably, one holding portion hooks and holds the circuit board, and the other holding portion pinches the one holding portion side that holds the circuit board. When one holding part moves, the circuit board is no longer hooked. The holding of the circuit board by the holding portion is released. By clamping the circuit board by the other holding portion, the circuit board can be allowed to move slightly.

Preferably, the other holding portion has a gap for sandwiching the inserted circuit board, the gap is tapered, and the other holding portion holds the circuit board in an inclined state so that the one holding portion side is separated from the terminal block. Use the tapered gap to make the circuit board in an inclined state. That is, the circuit board is allowed to move obliquely. Here, by inclining the circuit board around the other holding portion side of the circuit board, the circuit board can be taken out of the case. When the circuit board is taken in and out, the terminal block can be avoided, and the circuit board can be taken in and out easily.

Preferably, the electronic components are mounted on the circuit board, and the tall electronic components are arranged on one side of the holding portion of the circuit board. When the circuit board is tilted, one holding portion side of the circuit board moves more largely than the other holding portion side. That is, the front side or the rear side of the case corresponding to one holding part side of the circuit board secures a space sufficient for the circuit board to move. Therefore, a tall electronic component can be arranged on the side of one holding portion of the circuit board.

Preferably, an insertion port for electric wires is formed on the electrical box, and the connection port between the insertion port and the terminal base is located on a straight line. Even if the terminal block protrudes to the front of the box, it will not become an obstacle for the entry and exit of the circuit board. Accordingly, since the entire terminal base can be displaced toward the case side, the width of the electrical box can be narrowed, and the size of the electrical box can be reduced. In addition, since the connection port is also displaced toward the case side, the connection port and the insertion port can be arranged on a straight line. Wires can be routed straight from the insertion port to the connection port, making the connection work easier.

Preferably, electric components such as fans and louvers are arranged in the center of the case in the left-right direction, the electrical box is arranged outside the electric components, the box is located outside the terminal block, and the circuit board when stored is located behind the terminal block. The circuit board moves in and out of the box body at a position avoiding the movement of the terminal base. In the space without the terminal block, the circuit board can enter and exit from any direction of the front, top, bottom, and outside directions of the box.

According to the present invention, the position of the terminal block and the position of the case can be partially overlapped by allowing the circuit board to be easily taken in and out of the case while avoiding the terminal block. Thereby, the electric wire can be arranged straightly with respect to the electric box, and the connection work of the electric wire to the terminal block becomes easy. In addition, the width of the electrical box is narrowed, realizing the miniaturization of the electrical box.

Description of drawings

Fig. 1 is a perspective view of an indoor unit of an air conditioner according to the present invention.

Fig. 2 is a sectional view of the indoor unit.

Fig. 3 is a perspective view of the indoor unit with the front cover removed.

Fig. 4 is a perspective view of the indoor unit with the front panel removed.

Fig. 5 is a perspective view of the electrical box with the cover removed.

Fig. 6 is a front view of the electrical box with the cover removed.

Fig. 7 is a perspective view of the electrical box with the cover removed.

Fig. 8 is a sectional view of the electrical box with the cover removed.

Fig. 9 is a cross-sectional view of the electrical box when the circuit board is carried in and out.

Fig. 10 is a perspective view of the electrical box when the circuit board is carried in and out.

Fig. 11 is a perspective view of an electrical box that does not house a circuit board.

Explanation of reference signs

1 heat exchanger

2 fans

3 Chassis

4 Suction port

5 outlet

7 filter

20 electrical box

21 circuit substrate

22 cabinets

23 wires

24 terminal block

29 insert channel

30 Insertion port

31 connection port

32 Holder

33 cover

40 Front holding part

41 Holder on the rear side

42 claws

45 clearance

46 ribs

47 Pedestals

51 Tablets

Detailed ways

1 and 2 have shown the indoor unit of the air conditioner of this embodiment. The indoor unit includes a heat exchanger 1 and a fan 2 built in a cabinet 3 . The cabinet 3 elongated in the left-right direction is installed on the upper part of the indoor wall so as to form a gap with the ceiling.

As shown in FIG. 2 , a suction port 4 is formed on the upper surface of the cabinet 3 . An air outlet 5 is formed on a curved surface from the front surface to the bottom surface of the cabinet 3 . An air supply passage 6 is formed inside the cabinet 3 from the suction port 4 to the air outlet 5 , and the heat exchanger 1 and the fan 2 are arranged in the air supply passage 6 . The filter 7 is detachably provided between the suction port 4 and the heat exchanger 1 . The heat exchanger 1 surrounds the front and the top of the fan 2 .

As shown in FIGS. 3 and 4 , the chassis 3 is composed of a back panel 10 and a front panel 11 . The heat exchanger 1 and the fan 2 are installed on the back panel 10 . The front panel 11 is detachably attached to the back panel 10 . The upper surface, the front surface and the curved surface of the front panel 11 are open, and the opening on the upper surface is the suction port 4 .

The front cover 12 covers the opening of the front surface of the front panel 11 , and the front cover 12 is attached to the front panel 11 so as to be openable and detachable. A grill-shaped filter guide 13 is provided above the opening on the front surface and on the opening on the upper surface, and holds the filter 7 . When the front cover 12 is opened, the filter 7 is exposed so that the filter 7 can be attached and detached.

A drain pan unit 14 is provided on the opening of the curved surface. The drain pan unit 14 is mounted on the back panel 10 . The air outlet 5 is formed in the drain pan unit 14 , and the drain pan unit 14 is provided with not only a wind guide panel 15 for opening and closing the air outlet 5 but also a wind direction plate 16 .

The heat exchanger 1 and the fan 2 are arranged in the left-right direction in the casing 3 . An electrical box 20 is arranged inside the case 3 . In the left-right direction, a storage space for the electrical box 20 is formed on the right side when viewed from the front. Part of the refrigerant piping of the heat exchanger 1 and the fan motor enter the storage space. That is, the fan 2 as an electric component is disposed at the center of the case 3 in the left-right direction, and the electrical box 20 is disposed outside the fan 2 . The electrical box 20 is mounted on the back panel 10 and covered by the front panel 11 . When the front panel 11 is removed, the electrical box 20 is exposed. In the following description, the outer side means the right side in the left-right direction. In addition, as shown in each figure, the width direction of the housing 3 viewed from the front is defined as the left-right direction, the depth direction of the housing 3 is defined as the front-rear direction, and the height direction of the housing 3 is defined as the vertical direction.

As shown in Figures 5 to 7, the electrical box 20 includes: a circuit board 21, which is used to drive electric components such as the fan 2, and controls the operation of the air conditioner; a box body 22, which accommodates the circuit board 21 so that it can be assembled and disassembled; and terminals Seat 24 is connected with electric wire 23.

The box body 22 and the terminal base 24 are integrally formed, the box body 22 is arranged along the front-rear direction, and the terminal base 24 is located at the front side of the box body 22 . In addition, the box body 22 is located outside the terminal block 24 in the left-right direction. In the space surrounded by the case 22 and the terminal block 24, a fan motor, piping for drainage, and the like are disposed.

A room temperature detector 25 is provided in the electrical box 20 . The room temperature detector 25 is incorporated in a bracket 27 formed with a vent hole 26 , and the bracket 27 is attached to the terminal block 24 . The bracket 27 is disposed inwardly of the electrical box 20 in the left-right direction. A room temperature detector 25 is located between the filter 7 and the front surface of the heat exchanger 1 . The inhaled room air passes through the bracket 27 after passing through the filter 7 . Therefore, the room temperature detector 25 is exposed to clean air, and dust and the like do not adhere to sensor elements such as thermistors and the bracket 27 . In addition, the bracket 27 can be opened and closed, the sensor element can be attached and detached, and maintenance such as replacement and cleaning of the sensor element can be easily performed.

A display panel 28 including LEDs is provided on the lower side of the terminal block 24 . On the rear side of the display panel 28 and on the lower side of the box body 22 , an insertion channel 29 through which the electric wire 23 passes is formed. The rear side of the insertion passage 29 is an insertion opening 30 , and the insertion passage 29 is a passage formed by walls surrounding the upper, lower and left sides, and is formed obliquely upward and forward from the insertion opening 30 . A connection port 31 is formed in the terminal base 24 , and the connection port 31 and the insertion port 30 are located on a straight line.

Wires 23 such as connection wires, signal wires, and power cables from the outdoor unit are inserted through the insertion port 30 , and the wires 23 reach the terminal block 24 straight through the insertion channel 29 , and the wires 23 are connected to the terminals through the connection port 31 . Therefore, it is not necessary to bend and wire the electric wires 23, and the connection work of the electric wires 23 is facilitated.

The box body 22 has a holding box 32 that holds the circuit board 21 and a cover 33 that closes the holding box 32 . The front side of the box body 22 is opened, and the holding box 32 is provided on the rear side. The cover 33 covers the opening on the front side, and is detachably attached to the holding box 32 . The circuit board 21 is mounted in the front-rear direction.

As shown in FIG. 8 , a pair of holding portions 40 and 41 for holding the circuit board 21 are provided on the case 22 . One holding portion 40 is movable relative to the circuit board 21 , and the other holding portion 41 holds the circuit board 21 in a movable manner. The respective holding portions 40 , 41 are provided on the front side and the rear side of the holding box 32 , respectively. The holding part 40 which is the front side of one holding part hooks and holds the front side of the circuit board 21 . The holding portion 40 includes a bendable claw 42 . Stands 43 are respectively formed on the holding box 32 to face the pair of upper and lower claws 42 formed on the box body 22 . The front side of the circuit board 21 is held by the claw 42 pressing the circuit board 21 in contact with the holder 43 . The claw 42 is elastically supported and bent in the front-rear direction. That is, the holding portion 40 on the front side is movable relative to the circuit board 21 . By bending and moving the claw 42 to the front side, the claw 42 is separated from the circuit board 21 , and the holding of the circuit board 21 by the holding portion 40 on the front side is released.

The rear side holding portion 41 which is the other holding portion sandwiches and holds the rear side of the circuit board 21 . The holding portion 41 has a gap 45 sandwiching the rear side of the inserted circuit board 21 . The gap 45 is formed by ribs 46 and pedestals 47 which are arranged opposite to each other in the left-right direction. The rib 46 is located on the outside of the base 47 . The surface of the rib 46 that faces the seat 47 is inclined, and the gap 45 is tapered. As shown in FIG. 9 , when the rear side of the circuit board 21 is fitted into the gap 45 , if the holding of the front side of the circuit board 21 is released, the circuit board 21 can move to a state inclined outward. When the circuit substrate 21 is tilted, the front side of the circuit substrate 21 is separated from the terminal block 24 . That is, the holding portion 41 on the rear side allows the tilting movement of the circuit board 21 .

The upper side and the lower side of the circuit board 21 are held by the upper and lower guide walls 48 provided on the holding box 32 . In the case 22 , the circuit board 21 is fixed at a predetermined position by the front and rear holding portions 40 and 41 and the upper and lower guide walls 48 .

The cover 33 of the box body 22 covers the upper surface, the lower surface, the front surface, and the right side of the opening of the box body 22 . The outer wall 50 is formed opposite to the opening wall 49 on the front side of the holding box 32 , and the rear side of the cover 33 is sandwiched between the opening edge 49 and the outer wall 50 . The front side of the cover 33 is clamped by the claw 42 and the pressing piece 51 formed opposite to the claw 42 . The cover 33 is attached to the holding box 32 by sandwiching the front side and the rear side of the cover 33 .

The front side of the cover 33 is inserted between the cover 33 and the pressing piece 51 . Thus, the claw 42 is pressed toward the circuit board 21 . The movement of the claw 42 is restricted, which prevents the claw 42 from being separated from the circuit substrate 21, so that the circuit substrate 21 does not shake.

Electronic components such as connectors are mounted on the circuit board 21 . The connector is connected with wires from the terminal block 24 and wires towards the fan motor. The wires are looped back from the outside of the box body 22 and connected to the connectors in the box body 22 . Guide holes 52 for passing wires are formed on the front and lower surfaces of the cover 33 . A wire support 53 protrudes outward from the terminal base 24 . A plurality of wires from the terminal block 24 are bundled by the bracket 53 and inserted into the box body 22 through the guide hole 52 of the cover 33 .

In addition, a part of the terminal block 24 is located in front of the case 22 . By arranging the terminal block 24 toward the outside, the width of the electrical box 20 in the left-right direction becomes smaller, and the storage space can be reduced. And the insertion channel 29 is formed corresponding to the position of the box body 22 to determine the position of the insertion port 30 . Since the terminal block 24 can protrude to the front of the case 22, the connection port 31 can be arranged toward the outside. Therefore, the connection port 31 and the insertion port 30 of the terminal block 24 can be located on a straight line. The electric wires 23 can be routed straight, which facilitates the connection work of the electric wires 23 .

The terminal base 24 protrudes to the front of the box body 22 . Therefore, the terminal block 24 exists in front of the circuit board 21 at the time of storage. The circuit board 21 may be taken out from the case 22 for repair or the like. Here, the circuit board 21 can be moved in and out while avoiding the terminal block 24 by utilizing the empty space on the front side of the box body 22 .

When the front panel 11 is removed from the cabinet 3 and the cover 33 is removed from the case body 22 , empty spaces are opened toward the front side, the upper side, and the outer side. The circuit board 21 deviates from the stored position and moves outward. Thereby, when the circuit board 21 goes in and out, the terminal block 24 does not become an obstacle. The circuit board 21 can enter and exit from any of the front, upper, lower, and outer directions through the empty space. There are no obstacles in any direction when entering or exiting. For example, there is no obstacle such as the wire support 53 above the box body 22 . The operator can smoothly move the circuit board 21 in and out of the case 22 from the direction where the work is easy according to the position of the operator.

Electronic components having different heights are mounted on the circuit board 21 . There is an empty space on the front side of the box body 22 . Therefore, tall electronic components such as transformers, capacitors, and noise filters are arranged on the front side of the circuit board 21 . Low-profile electronic components are mainly arranged on the rear side of the circuit board 21 . Since large electronic components can be arranged in an empty space, heat generated from the electronic components can be dissipated without being accumulated.

When an operator takes out the circuit board 21 , first, the front panel 11 is removed, and the cover 33 is removed from the case 22 . As shown in FIG. 5, a circuit substrate 21 is presented. When the cover 33 is removed, the restriction on the claw 42 is released. When the operator moves the claw 42 forward, the claw 42 is separated from the circuit board 21 .

As shown in FIGS. 9 and 10 , the worker tilts the circuit board 21 outward. In a state where the rear side of the circuit board 21 is fitted in the gap 45 as it is, the front side of the circuit board 21 is inclined outward. The circuit board 21 is separated from the upper and lower guide walls 48 . Since tall electronic components are mounted on the front side of the circuit board 21, the electronic components do not touch the holding box 32 even if the circuit board 21 is tilted. Thereby, the circuit board 21 becomes the state which can be taken out from the case 22. As shown in FIG.

The operator moves the front side of the circuit board 21 outward, and takes out the circuit board 21 forward. The rear side of the circuit board 21 is pulled out from the gap 45 to take out the circuit board 21 from the holding case 32 . Thereby, the movement of the circuit board 21 can avoid the terminal block 24 located ahead, and the operation|movement of the circuit board 21 becomes easy.

When mounting the circuit board 21 , the circuit board 21 is inserted from the front of the case 22 , and the rear side of the circuit board 21 is inserted into the gap 45 . When the circuit board 21 inclined outward is pressed inward, the claw 42 is bent by the circuit board 21 , and the front side of the circuit board 21 passes over the claw 42 and finally gets stuck on the claw 42 . After the cover 33 is attached to the holding box 32 , the claws 42 are pressed, and the circuit board 21 is firmly fixed and accommodated in the box body 22 .

In addition, the present invention is not limited to the above-described embodiments, and it is needless to say that various modifications and changes can be made to the above-described embodiments within the scope of the present invention. The holding portion on the front side may hold the front side of the circuit board movably, and the holding portion on the rear side may be movable. At this time, the holding box is provided on the front side of the circuit substrate, and the cover is provided on the rear side of the circuit substrate. In addition, a slidable claw may be used as the movable holding portion. The claw is moved toward the circuit board by biasing the claw with the spring.

The entry and exit directions of the circuit board may be upward, downward, and outward directions other than the front. However, the holding box becomes an obstacle when the insertion and withdrawal direction of the circuit board is the outer direction. Here, the holding box is reduced and the cover is enlarged. Accordingly, the circuit board can be smoothly taken out in the outward direction.

Not only the holding part on the front side can be moved, but also the holding part on the rear side can be made movable. For example, ribs forming tapered gaps are movably provided on the holding box. The ribs are movable by spring bias. When the cover is removed, the restriction on the front holding portion is released, and when the front holding portion moves, the rear ribs holding the circuit board are moved by the urging force of the spring. For example, the rib is lifted and moved left and right or slid up and down. Accordingly, by moving the circuit board in a direction different from the front-rear direction, the circuit board is in a state where it can be easily taken out of the case.

At least one front and rear pair of holding parts is sufficient, but there may be three or more holding parts. And, at least one of the plurality of holding portions holds the front side or the rear side of the circuit board. The other holding portion holds one or more of the opposite side of the circuit board in the front-back direction, the lower side of the circuit board, and the upper side of the circuit board.

In the above-mentioned embodiments, the electrical box is disposed on the right side of the chassis, but the electrical box may also be disposed on the left side of the chassis. At this time, the structure of the electrical box can be reversed left and right.

Claims (8)

1. the indoor set of an air conditioner, it is characterized in that, the cabinet that is provided with electrical components is built-in with electrical box, the terminal base that electrical box has casing and is connected with electric wire, described casing will can be installed and removed for driving the circuit substrate of electrical components to be accommodated, and terminal base is configured in the front side of casing, is provided with at least one pair of maintaining part of holding circuit substrate on casing, one side's maintaining part can move with respect to circuit substrate, and the opposing party's maintaining part is held in circuit substrate can move.

2. the indoor set of air conditioner according to claim 1, it is characterized in that, when a side maintaining part moves and removes the maintenance to circuit substrate, circuit substrate moves towards the direction different from fore-and-aft direction under the state still being kept by the opposing party's maintaining part, and circuit substrate becomes the state that can take out from casing.

3. the indoor set of air conditioner according to claim 1 and 2, is characterized in that, casing has the lid that can install and remove, and lid limits one maintaining part by being connected to a side maintaining part moves.

4. according to the indoor set of the air conditioner described in any one in claim 1～3, it is characterized in that, a side maintaining part hook holding circuit substrate, the opposing party's maintaining part is clamped holding circuit substrate.

5. according to the indoor set of the air conditioner described in any one in claim 2～4, it is characterized in that, the opposing party's maintaining part has the gap that the circuit substrate of insertion is clamped, gap forms taper, and the opposing party's maintaining part keeps leaving with a side maintaining part side the circuit substrate of the mode heeling condition of terminal base.

6. according to the indoor set of the air conditioner described in any one in claim 1～5, it is characterized in that, circuit substrate is mounted with electronic component, and highly high electronic component arrangements is in a side's of circuit substrate maintaining part side.

7. according to the indoor set of the air conditioner described in any one in claim 1～6, it is characterized in that, in electrical box, be formed with the insert port of electric wire, the connector of insert port and terminal base is positioned on straight line.

8. according to the indoor set of the air conditioner described in any one in claim 1～7, it is characterized in that, electrical components is configured in the central authorities of the left and right directions of cabinet, electrical box is configured in the outside of electrical components, casing is positioned at the outside of terminal base, circuit substrate while taking in is positioned at the rear of terminal base, and the position of circuit substrate after avoiding terminal base and moving be enterprising goes out casing.