JP3745976B2 - Terminal block - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a terminal block used for a printed circuit board of a lighting circuit mainly used for a lighting fixture.
[0002]
[Prior art]
Conventionally, since the number of poles of a terminal block is determined by the hushing shape, each terminal block having a fixed number of poles must be manufactured individually, and the number of poles cannot be changed freely.
[0003]
On the other hand, as shown in FIG. 13, there is a terminal block in which the number of poles can be increased by connecting a plurality of housings 100 mounted on the printed circuit board 101 (for example, Japanese Utility Model Laid-Open No. 6-21157).
[0004]
[Problems to be solved by the invention]
However, since the connecting method is performed by press-fitting the columnar protrusion and the hole, a jig or the like is required for the assembly, and the coupling force is weak, so that there is a possibility that it is easily detached. Furthermore, due to a problem in manufacturing accuracy, if the positions of the protrusions and the holes are shifted even a little, a large shift occurs in a large number of connections, and a gap 103 is formed between the printed circuit board 101 and the terminal block 100, which makes mounting difficult. .
[0005]
In addition, there is a terminal device in which the assembling method is a slide type connection (for example, Japanese Patent Laid-Open No. 5-182700), but since it is a slide type, it is easily detached in the sliding direction.
[0006]
Accordingly, an object of the present invention is to provide a terminal block that can be easily assembled and reliably connected.
[0007]
[Means for Solving the Problems]
The terminal block according to claim 1 is a terminal block for connecting an electric wire directly attached to a printed circuit board, and includes a plurality of housings having the same shape in which a connection conductor is accommodated,
Each of the housings is a thin rectangular box connected to each other in the thickness direction, and opens a storage space for storing the connection conductor on one side in the thickness direction, and is connected to one corner portion on the circumferential side. Form an insertion hole to insert the connecting wire in the angular direction,
Furthermore, the latching claw which consists of an elastic piece which protrudes from the opening part which opens the said storage space of these housings, and the same axis | shaft of the connection direction with the said latching claw on the one side opposite to the said one surface with the said opening part A hole for inserting the locking claw of the housing adjacent to the housing, and a step portion for locking the locking claw to the hole ,
And an end cover for closing the openings of the housings arranged at the ends of the plurality of housings, a hole for inserting the locking claw into the end cover, and a stepped portion for locking the locking claw to the hole. Provided,
The locking claws are arranged on both sides of the locking spring with respect to the insertion direction of the connecting wire into the insertion hole,
The connection conductor is formed by bending a conductive plate into a substantially oval shape, one end of which is a lock spring for holding the connection electric wire, and the other end is a contact piece, and the lock spring is opposed to the inner surface of the contact piece. .
[0008]
According to the terminal block of claim 1, the number of poles can be changed by connecting a plurality of housings of the same shape, and the housings are connected to each other by the locking claws, so that the connection strength is strong and the connection is ensured. Can do. Further, even if the number of connections is increased, since it is not necessary to press-fit, the connection can be made almost straight, and the stepped portion for hooking the locking claw is provided in the hole, so that it is not easily removed by an external force.
[0012]
Further, since the locking claws are provided on both sides of the locking spring, the force applied to the locking claws is almost equal to the insertion of the electric wire, so that there is no wide gap on one side.
[0013]
A terminal block according to a second aspect is the terminal block according to the first aspect , wherein the locking claw is provided in the vicinity of the insertion hole.
[0014]
According to the terminal block of the second aspect , in addition to the same effect as the first aspect , even when the electric wire is twisted, the housings or the housing and the end cover are fixed by the locking claws near the insertion hole. So it does not come off easily.
[0015]
According to a third aspect of the present invention, the terminal block according to the first or second aspect has a plurality of the locking claws, and the protruding directions thereof are substantially the same direction.
[0016]
According to the terminal block of the third aspect, in addition to the same effect as that of the first or second aspect , since the protruding directions of all the locking claws are the same, the clearance between the locking claws and the locking portions is reduced. It can be provided, and the shift at the time of connection can be finely adjusted.
[0017]
A terminal block according to a fourth aspect is the terminal block according to the third aspect , wherein all the protruding directions of the claw tips of the locking claw are substantially parallel to the terminal block mounting surface.
[0018]
According to the terminal block of the fourth aspect, the same effect as the third aspect is obtained.
[0019]
The terminal block according to a fifth aspect is the terminal block according to the third aspect , wherein all protruding directions of the claw tips of the locking claw are substantially perpendicular to the terminal block mounting surface.
[0020]
According to the terminal block of the fifth aspect, the same effect as the third aspect is obtained.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention will be described with reference to FIGS. That is, the terminal block used for this printed circuit board has a plurality of housings 1 and 2, an end cover 3, and a connection conductor 4.
[0022]
The plurality of housings 1 and 2 have the same shape in which the connection conductor 4 is accommodated. Each of the housings 1 and 2 includes a locking claw 18 made of an elastic piece provided on one side in the connecting direction of the housings 1 and 2, and a housing adjacent on the same axis with respect to the connecting direction on one side opposite to the one side. A hole 19 for inserting the locking claw 18 and a step portion 19a for locking the locking claw 18 to the hole 19 are provided (see, for example, FIG. 9). The housings 1 and 2 have a storage space 6 for housing the locking spring 13 of the connection conductor 4 opened on the front surface, and have an insertion hole 7 for inserting the connection electric wire 25 on the side surface, from the opening 5 side of the storage space 6. The locking claw 18 protrudes. In particular, the locking claws 18 are disposed on both sides of the locking spring 13 with respect to the insertion direction of the connecting wire 25. A part of the locking claw 18 is provided in the vicinity of the insertion hole 7 of the connection electric wire 25. Furthermore, the protruding directions of the toes of all the plurality of locking claws 18 are substantially the same direction, and all the protruding directions of the toes of the locking claws 18 are substantially parallel to the terminal block mounting surface 2a (see FIG. 8, see FIG.
[0023]
In the embodiment, the housings 1 and 2 are thin box bodies, the opening 5 is formed on one surface in the thickness direction, the housing space 6 is provided inside, and the peripheral side of the opening 5 is rectangular, for example, approximately It has a square shape. A plurality of positioning and projecting ridges for securing an insulation distance between a plurality of, for example, three locking claws 18 and the housing outer surface of the connection conductor 4 toward the opening direction at the peripheral edge of each opening 5 of the housing 1, 2. 22 is formed. On the back side of the housing 2, a hole 19 for locking to the locking claw 18 and a concave line 23 for fitting the stepped portion 19 a and the protrusion 22 are formed. Further, a positioning fitting recess 27 is formed to be fitted to the protrusion 6b. However, since the housings 1 and 2 have the same structure, the housing 1 also has a hole 19, a stepped portion 19 a, and a recessed portion 23.
[0024]
The insertion hole 7 is formed diagonally in one corner portion, and an electric wire unlocking hole 9 is provided on the upper surface adjacent to the insertion hole 7, and the unlocking button 10 is inserted into the electric wire unlocking hole 9, A retaining claw 11 provided on the locking button 10 is locked to the back side of the wire unlocking hole 9. The lead extraction holes 8 are formed at two locations, for example, approximately the center position and one side position, on the lower surface substantially opposite to the insertion hole 7, that is, the joint surface 2a with the printed circuit board as the terminal block mounting surface. The housings 1 and 2 overlap in the same direction, but the housing 2 closes the opening 5 of the housing 1 on the back surface.
[0025]
The end cover 3 closes the opening 5 of the housing 2 aligned with the ends of the housings 1 and 2, and the end cover has a hole 19 for inserting the locking claw 18 and a step for locking the locking claw 18 to the hole 19. The part 19a and the recessed parts 23 and 27 are provided.
[0026]
The connection conductor 4 has a quick-connection structure having a lock spring 13 for holding the connection electric wire 25, and has a lead portion 12 drawn out from the lead extraction hole 8 of each of the housings 1 and 2 and is stored in the storage space 6. Has been. In the embodiment, the conductive plate is bent into a substantially oval shape, one end thereof is a lock spring 13, the other end is a contact piece 14, the lock spring 13 is opposed to the inner surface of the contact piece 14 in an inclined posture, and the contact piece A notch 15 is formed on one side of 14, the tip 10 a of the unlocking button 10 is passed through the notch 15, and the tip 10 a is in contact with the lock spring 13. The lead portion 12 connected to the printed board is integrally formed by cutting and raising at the middle portion of the conductive plate, and protrudes outward. The lead portion 12 is inserted into the lead extraction hole 8 and the leading end of the lock spring 13 is disposed inward of the insertion hole 7 so that the conductive member 4 is placed in the storage space 6. Positioning is performed by the peripheral wall to be formed and the convex portions 6 a and 6 b provided in the storage space 6. In order to shift the positions of the lead portions 12 drawn out from the housings 1 and 2, the cut and raised positions of the lead portions 12 are changed, and the lead portion 12 of the conductive member 4 housed in the housing 1 is a lead portion drawing hole in the center portion. 8, the lead portion 12 of the conductive member 4 housed in the housing 2 is inserted into the lead portion drawing hole 8 on the side portion.
[0027]
In the arrangement of the lock spring 13 as in the embodiment, the engagement claw 18 can be set large, so that the connection strength is further improved.
[0028]
In this terminal block, the conductive members 4 are housed in the housings 1 and 2 to which the unlocking buttons 10 are mounted, respectively, and the lead portions 12 are pulled out. The housing 2 is overlaid on the opening 5 of the housing 1, and the locking claw 18 of the housing 1 is inserted into the hole 19 of the housing 2 and hooked on the stepped portion 19 a. Similarly, the cover 3 is overlaid on the opening 5 of the housing 2, and the locking claw 18 is hooked on the stepped portion 19 a of the hole 19, thereby completing the assembly.
[0029]
8 and 9, the lead 12 of the terminal block is inserted into the hole of the printed circuit board 32, the mounting surface 2a is mounted on the printed circuit board 32, and soldering 33 is performed. Since the locking claw 18 is an elastic piece, a clearance 35 in the locking direction of the locking claw 18 is provided between the locking claw 18 and the clearance 36 between both side surfaces of the locking claw 18 and the opposite surface of the hole 19. Can be provided. For this reason, the mutual alignment of the housings 1 and 2 can be adjusted.
[0030]
FIG. 10 shows a configuration in which a plurality of terminal blocks P and Q are mounted on a printed circuit board 32, an electronic component 39 is mounted, housed in a case body 37, and covered with a case cover 38.
[0031]
FIG. 11 shows a form in which five identical housings 41 to 43 are added and a total of five are connected. The number of poles can be increased by connecting and connecting a set of one pole (housing, connection conductor 4, release button 10). Further, since the connecting direction and the assembly direction are the same, the assembly is easier than the conventional slide type.
[0032]
A second embodiment of the present invention will be described with reference to FIG. In the first embodiment, the protruding directions of the claw tips of all the locking claws 18 are substantially perpendicular to the terminal block mounting surface 2a. The mounting surface 2a is placed on the printed circuit board 32, and the lead portion 12 is inserted into the hole and soldered 33 is mounted. At this time, fine adjustment between the housings 1 and 2 can be made using the clearance 34 between the opposite side surfaces of the locking claw 18 and the opposing surface of the hole 19 and the clearance in the elastic deformation direction of the locking claw 18. 2 can be aligned to the surface position.
[0033]
Three or more housings may be stacked. In addition, although the locking claw 18 is provided on the opening 5 side of the housings 1 and 2, the cover 3 and the housing 2 may be provided on the back side, and a hole may be provided on the periphery of the opening 5. Further, the terminal block of the present invention can be constituted by only the cover 3 and the housing 2. Furthermore, although the terminal was a quick connection type, it is not restricted to this.
[0034]
【The invention's effect】
According to the terminal block of claim 1, the number of poles can be changed by connecting a plurality of housings of the same shape, and the housings are connected to each other by the locking claws, so that the connection strength is strong and the connection is ensured. Can do. Further, even if the number of connections is increased, since it is not necessary to press-fit, the connection can be made almost straight, and the stepped portion for hooking the locking claw is provided in the hole, so that it is not easily removed by an external force.
[0036]
Further , since the locking claws are provided on both sides of the locking spring, the force applied to the locking claws is almost equal to the insertion of the electric wire, so that there is no wide gap on one side.
[0037]
According to the terminal block of the second aspect , in addition to the same effect as the first aspect , even when the electric wire is twisted, the housings or the housing and the end cover are fixed by the locking claws near the insertion hole. So it does not come off easily.
[0038]
According to the terminal block of the third aspect , in addition to the same effect as that of the first or second aspect , since the protruding directions of all the locking claws are the same, the clearance between the locking claws and the locking portions is reduced. It can be provided, and the shift at the time of connection can be finely adjusted.
[0039]
According to the terminal block of the fourth aspect, the same effect as the third aspect is obtained.
[0040]
According to the terminal block of the fifth aspect, the same effect as the third aspect is obtained.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a first embodiment of the present invention.
FIG. 2 is a perspective view of the whole.
3 is a perspective view seen from the opposite direction to FIG. 2. FIG.
FIG. 4 is a front view of the housing with the electric wire inserted in a state where the end cover is opened.
FIG. 5 is a front view of a state where the electric wire of FIG. 4 is not connected.
FIG. 6 is an exploded perspective view.
7 is an exploded perspective view seen from the opposite side to FIG. 6. FIG.
FIG. 8 is a rear view of a state where the printed circuit board is mounted.
9 is a cross-sectional view taken along line AA in FIG.
FIG. 10 is a perspective view of a state in which a printed circuit board is incorporated in a case.
FIG. 11 is a perspective view showing connection of housings.
FIG. 12A is a rear view of a state where it is mounted on a printed circuit board according to the second embodiment, and FIG.
FIG. 13 is a partial perspective view of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Housing 2 Housing 3 End cover 4 Connection conductor 5 Opening part 6 Storage space 7 Insertion hole 8 Lead extraction hole 12 Lead part 13 Locking spring 18 Locking claw 19 Hole 19a Step part 20 Communication part 25 Connection electric wire 32 Printed circuit board

Claims (5)

A terminal block for connecting an electric wire directly attached to a printed circuit board, comprising a plurality of housings of the same shape containing connection conductors,
Each of the housings is a thin rectangular box connected to each other in the thickness direction, and opens a storage space for storing the connection conductor on one side in the thickness direction, and is connected to one corner portion on the circumferential side. Form an insertion hole to insert the connecting wire in the angular direction,
Furthermore, the latching claw which consists of an elastic piece which protrudes from the opening part which opens the said storage space of these housings, and the same axis | shaft of the connection direction with the said latching claw on the one side opposite to the said one surface with the said opening part A hole for inserting the locking claw of the housing adjacent to the housing, and a step portion for locking the locking claw to the hole ,
And an end cover for closing the openings of the housings arranged at the ends of the plurality of housings, a hole for inserting the locking claw into the end cover, and a stepped portion for locking the locking claw to the hole. Provided,
The locking claws are arranged on both sides of the locking spring with respect to the insertion direction of the connecting wire into the insertion hole,
The connection conductor is a terminal block in which a conductive plate is bent into a substantially oval shape, one end of which is a lock spring for holding the connection wire, and the other end is a contact piece and the lock spring is opposed to the inner surface of the contact piece . Terminal blocks of the locking claw is claim 1, wherein provided in the vicinity of the insertion hole. The terminal block according to claim 1, wherein a plurality of the locking claws are provided, and the protruding directions are substantially the same direction. The terminal block according to claim 3, wherein all protruding directions of the claw tips of the locking claw are substantially parallel to the terminal block mounting surface. The terminal block according to claim 3, wherein all protruding directions of the claw tips of the locking claw are substantially perpendicular to the terminal block mounting surface.

Images