JPH0229748Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a connection structure of an electronic circuit board in a junction block.

[Conventional technology]

Conventionally, electrical or electronic components such as relays and fuse circuit breakers installed in automobiles, etc.
As a junction block (hereinafter simply referred to as JB) that is incorporated with a printed circuit board-like bus bar, the one shown in a partial perspective view in FIG. 4 is usually used. That is, in the conventional JBa, the above-mentioned various parts are put together into units b for each function and housed in a housing c, and are housed in a housing d that accommodates rising terminals (not shown) from the bus bar incorporated in the JBa. Since the structure is such that the lock pieces e and f provided on each unit are fitted together to be installed, each unit has a large number of parts, which not only complicates the installation work but also makes the external structure complicated. There were some shortcomings.

[Problem that the invention attempts to solve]

This invention was developed by focusing on the shortcomings associated with connections with various units in conventional JBs. To provide a connection structure that enables a PCB to be smoothly mounted on a JB with a slight insertion force without causing any stress, and further enables reliable connection to a busbar terminal of the JB.

[Means for solving problems]

The present invention will be described below with reference to the accompanying drawings showing embodiments.

The connection structure of the PCB in the JB of this invention is
It mainly consists of a holder A for locking and holding the PCB, and a mounting part B for mounting the holder holding the PCB (hereinafter referred to as PCB holding holder) onto the JB main body cover C.
A cover D is mounted on the mounting portion B to protect the mounted PCB.

Figure 1a is a perspective view of the PCB holder A according to the present invention, Figure 1b is a perspective view of the JB main body cover C that has the attachment part B of the PCB holding holder, and Figure 1c is a perspective view of the JB main body cover C attached to the PCB holder A. A perspective view of an example of a PCB is shown.

In general, PCBs, as shown in Figure 1c,
Various electronic components A, B, C, D, etc. are installed on the divided printed circuit boards E ₁ , E ₂ according to their functions, and wiring (not shown) connecting these electronic components is installed on the printed circuit boards E ₁ , E 2 . It is applied to the back of ₂ , and
Terminals M ₁ and M ₂ connected to the wiring are arranged vertically in a hook shape at the ends of the substrates E ₁ and E ₂ with their electrical contact portions facing toward the front edges of the substrates E ₁ and E ₂ . It is something. The PCB holder A according to the present invention is a holder for mounting such a plurality of divided PCBEs, and has a configuration as described below.

That is, in FIG. 1a, on the periphery of the rectangular plate-shaped bottom plate 1 except for the front edge in the longitudinal direction and on the bottom plate 1,
A support base 3 having flexible locking pieces 2, 2' erected thereon is provided, and a wall 4 is erected at the front edge of the bottom plate 1. Further, insertion guides 5 are provided outwardly at both ends of the rear edge of the bottom plate 1 facing the wall 4, and furthermore, the bottom plate 1 on the side of the wall 4 has a support surface at the same height as the support base 3. A support stand 6 having a locking step 6' is provided upright, and a slit 7 is opened in the bottom plate 1 along the wall 4.

The support base 3 and the support base 6 are for stably holding and fixing the PCB, and the locking pieces 2, 2' are arranged so that the locking portions 2a of the locking pieces 2, 2' face inward, corresponding to the edges of the respective PCBs.

Furthermore, the height of the wall 4 erected on the front edge of the bottom plate 1 is slightly higher than the height of the plurality of busbar terminals F (see Fig. 1b) protruding in series on the JB main body cover C. The upper edge of the wall 4 is formed with a projection 8 toward the inside and a projection 9 toward the outside. In addition, the insertion guide 5 is attached to the holder A in the mounting part B.
It serves as a guide when inserting the holder A, as well as a support shaft for rotatably mounting the holder A in the mounting portion B, and is formed of something like a circular plate fixed to the tip of a cylindrical shaft.

Next, as shown in FIG. 1b, the JB main body cover C has a connector 11 for terminal connection with the JB main body (not shown) and a relay fitting part 12 on the upper plate 10, as well as a plurality of bus bars formed upright from the bus bar. Terminals (female terminals in the illustration) F are protruded in series,
In the present invention, on the upper plate 10 including the terminal F,
Mounting part B of PCB holder A is formed.

The mounting portion B is defined by side plates 13 that stand on both sides of the group of terminals F and face the row of terminals F in a direction perpendicular to the terminals F. However, the upper edge of the side plate 13 of the lever is sloped 14 gradually lower than the terminal F side.

The side plate 13 on the terminal F side is formed higher than the terminal F and the wall 4 of the PCB holder A, and a protective piece 15 is formed on the side end in the direction of the terminal F, and the side plate 13 on the opposite side A reinforcing piece 16 is provided as necessary. Further, a groove 17 in which the insertion guide 5 of the PCB holder A is supported is bored in the lower upper edge of the side plate 13.

Above the PCB holder mounting part B having the above structure, a unit cover D for protecting the PCB unit is rotatably mounted on the rear edge of the mounting part B by means of a hinge or the like. Thus, lock portions 20 and 21 are formed on the front end surface 18 of the unit cover D and the front end surface 19 of the corresponding JB main body cover C, respectively, and the front end surface 18 of the unit cover D is provided with the lock portions 20 and 21, respectively.
A recess 22 corresponding to the protrusion 9 formed on the wall 4 of the PCB holder A is formed.

[Effect]

Next, the operation of the present invention having the above structure will be explained based on the operation explanatory diagrams of FIGS. 2 and 3.

Figure 2 is a schematic diagram of the PCB holder A shown in Figure 1, viewed from the side.The PCBE with electronic circuit components A, B, C, etc. installed is mounted on the PCB holder A in the order of Figure 2 a, b, and c. . That is, as shown in FIG. 2a, first, the PCBE male terminals M ₁ and M ₂ for the board are hooked onto the protrusion 8 on the upper edge of the wall 4 of the holder A from below.
When the front ends of the PCB boards E ₁ and E ₂ are aligned with the stepped part 6' of the support stand 6 and the rear ends are pushed in the direction of the arrow P ₁ , the side edges of the PCB boards E ₁ and E ₂ will correspond. It comes into contact with the locking piece 2 on the side of the holder A and bends it outward. If you continue to press the back of the boards E ₁ and E ₂ ,
As shown in Figure 2b of the base 2, the rear edge of the holder A comes into contact with the locking piece 2' on the rear edge of the holder A, and the locking piece 2' also bends outward. then
When the rear edges of the PCB boards E ₁ and E ₂ pass the protrusions of the locking pieces 2', they come into contact with the support plate 3 and insertion is stopped, and the locking pieces 2 and 2' return to their original states. As shown in Figure 2c, the peripheral edges of the PCB boards E ₁ and E ₂ are connected to the locking pieces 2
At the same time, the male terminals M ₁ , M 2 of the PCB are fitted into the locking parts 2 a of the PCB 2', and the male terminals M 1 , M ₂ of the PCB are connected to the protrusions 8 of the wall 4, and the male terminals M ₁ , M ₂ of the PCB are connected to the protrusions 8 of the wall 4,
The front end of the PCBE is placed in engagement with the support base 6, and the PCBE is securely held within the holder A.

Next, the PCB holding holder A' formed as described above is attached to the attachment part B shown in Fig. 1b.
This mounting is carried out in the order shown in FIGS. 3a, c, d, and e.

That is, as shown in FIG. 3a, first place the insertion guide 5 of the PCB holding holder A' on the side plate 13 of the mounting part B, and place the front end on the protective piece 15 of the side plate 13. Insert obliquely in the direction of arrow _P2 .
In this case, since the height of the protective piece 15 is formed sufficiently higher than the bus bar terminal F, the PCB holding holder A' is inserted without its bottom portion 1a coming into contact with the terminal F.

Note that FIG. 3b shows a partial side view of the state shown in FIG. 3a.

Next, as shown in FIG. 3c, when the insertion guide 5 of the PCB holding holder A' is engaged with the groove 17 on the rear upper edge of the side plate 13, the bottom surface 1a is separated from the protective piece 15, and the PCB holding holder A' is removed. It rotates in the direction of arrow _P3 using the insertion guide 5 as a fulcrum. As the rotation in the _P3 direction further progresses, the outer surface of the locking piece 2 of the holder A comes into contact with the inner surface of the side plate 13, as shown in FIG. 3d, and the return of the locking piece 2 is completed. When the PCBE is completely held, the bus bar terminal F is inserted through the slit 7 of the holder A into the upper surface of the bottom plate 1.

Next, when the PCB holding holder A' is further pushed in the direction of the arrow _P4 , the rotation about the insertion guide 5 further progresses, and the male terminal M of the PCBE and the bus bar terminal F are fitted and connected. In this case, PCBE is holder A
The male terminal is fully retained as described above and the male terminal
Since the upper ends of M ₁ and M ₂ are also engaged with the protrusion 8 of the wall 4, the terminals can be smoothly inserted and connected to each other.

Next, close the unit cover D shown in Figure 1b, and attach the lock part 20 of the unit cover D to the JB main body cover C.
By engaging the lock portion 21 of the PCBE, the PCBE unit can be safely protected.

Note that the insertion operation of the PCB holding holder A' from FIG. It may be performed simultaneously with the lid closing operation in D.

[Effect of idea]

Since the connecting portion structure of the present invention has the configuration and operation described in detail above, various advantages and effects as listed below can be obtained.

(1) Insertion force of PCB holding holder A' into mounting part B
F ₀ (in the direction of arrows P ₃ and P ₄ ) is defined by the insertion force of the terminals M ₁ and M ₂ into the terminal F in Fig. 3e as P, and the fulcrum 5 and the front edge pressing part of the PCB holding holder A'. If the distance to a certain protrusion 9 is l ₀ and the distance between the fulcrum 5 and the terminal F is l ₁ , then the following formula F ₀ = l ₁ · P/l ₀ is established, and since l ₀ > l ₁ , it is installed. Insertion force into the section
F ₀ is very small compared to the actual insertion force P between the terminals,
Multiple units can be attached to the junction block at the same time with little force.

(2) There is no need to lock the unit housing for each function as in the past, and the shape can be simplified and the number of parts can be reduced.

(3) Since the PCB holding holder is mounted on the slanted side plate via the insertion guide, mounting becomes smooth and the space for the mounting section can be minimized.

(4) The terminal connection part is protected from being exposed to the outside by the wall of the holder, the side plate of the attachment part, and the unit cover, so deformation due to external force is prevented.

(5) Since the electronic circuit board is independently locked and held in the holder, it is easy to maintain.
Therefore, it is possible to prevent damage and incomplete holding and fixing when mounting on the mounting section.

(6) Connection between PCB terminal and busbar terminal
Part of the force applied to the PCB terminal is applied to the holder, so the PCB terminal can be stably held against the PCB board.

[Brief explanation of the drawing]

FIG. 1a is a perspective view of an electronic circuit board holding holder according to the present invention, FIG. A perspective view showing an example of an electronic circuit board mounted on a circuit board holder;
Figures 2 a to c are explanatory diagrams of the operation when the electronic circuit board is mounted on the holding holder shown in Figure 1 a, and Figures 3 a to
Fig. 4e shows an explanatory diagram of the operation when a holding holder with an electronic circuit board mounted thereon is mounted on the mounting portion of the junction block main body cover, and Fig. 4 shows a partial perspective view of a conventional junction block. A...electronic circuit board holding holder, B...mounting part, C...junction block body cover,
D...Unit cover, E...Electronic circuit board, 1...
... Bottom plate, 2 ... Locking piece, 3 ... Support stand, 4 ... Wall, 5 ... Insertion guide, 7 ... Slit, 8, 9
...Protrusion, 10...Substrate, 13...Side plate, 15...
...Protective piece, 17...Groove, 20, 21...Lock portion, F...Busbar terminal, _M1 , _M2 ...Terminal.

Claims (1)

[Claims for Utility Model Registration] (1) In a junction block consisting of an electronic circuit board connected to a plurality of bus bar terminals protruding from the cover of the junction block body, A support stand having flexible locking pieces erected thereon is disposed corresponding to the periphery of the electronic circuit board, and a wall body having a protrusion on the inner side of the upper edge and formed higher than the busbar terminal is provided on the front edge. An electronic circuit board holder is provided with insertion guides on both ends of the rear edge facing the wall, and a slit is formed in the bottom plate along the wall; The busbar includes a side plate that is formed higher than the wall body, has a protective piece facing the busbar terminal at the higher side end, and has a groove for engaging the insertion guide at the lower upper edge. Connection of an electronic circuit board in a junction block, characterized in that the mounting part of the electronic circuit board holder is formed so as to stand upright from both sides of the terminal and face each other on the junction block main body cover. Department structure. (2) The connecting portion of the electronic circuit board in the junction block according to claim 1 of the utility model registration claim, characterized in that a cover provided with a locking means is mounted on the mounting portion of the electronic circuit board holder. structure.