JP4611850B2 - Terminal block - Google Patents

Description

  The present invention relates to a terminal block such as a power supply terminal block for connecting a power source to an electronic circuit built in, for example, a guide light lighting device or an emergency light lighting device.

  As a conventional terminal block having a grounding terminal, there is a grounding terminal protruding on the mounting surface, positioning protrusions on both sides of the grounding terminal, and a screwing mounting hole in the vicinity of the grounding terminal (for example, a patent) Reference 1).

As another terminal block, there is one in which a grounding terminal protrudes at a position deviating from two attachment portions and a line connecting them.
Japanese Patent Laid-Open No. 5-307979

  These ground terminals must correspond to the ground terminal contact portion such as a grounding hole in consideration of the plate thickness and processing tolerance of the mounting plate, but in the former example, the former has a positioning projection, but is a one-point stop. In the latter case, due to the distance between the mounting portion and the ground terminal, it is impossible to apply sufficient pressure to the ground terminal. For this reason, in many cases, the ground terminal itself has a spring structure and has a long terminal structure with a sharp tip and a long protrusion from the terminal block in order to cope with the tolerance of the ground hole.

  However, since it is necessary to make the appliance thin in terms of design in the guide lamp lighting fixture, it is necessary to shorten the allowance of the ground terminal.

  Therefore, an object of the present invention is to provide a terminal block that can reliably contact the ground terminal contact portion without lengthening the ground terminal.

The terminal block according to the present invention is a terminal block to be attached to the attachment receiving portion of the attached body provided with a ground contact portion , two attachment receiving portions and a recess, and has a mounting surface to be attached to the attached body on the bottom surface. And a housing having a pair of attachment portions attached to the attachment receiving portion on both sides, and a plurality of terminals housed in the housing and connected to the electric wires,
The plurality of terminals are quick connection terminals, and the ground terminals connected to at least one of the plurality of terminals and in contact with the ground contact portion intersect with a line connecting the pair of mounting portions of the mounting surface. Projecting from the housing
The housing has a wire insertion hole corresponding to the quick connection terminal, and a blade partially exposed at the front end portion of the housing so as to be pressure-connected to a connector provided separately from the quick connection terminal A terminal holding piece abutting on an upper end of the blade-shaped terminal, the mounting portion and the ground terminal being arranged closer to the blade-shaped terminal side, and the blade-shaped terminal than the mounting portion A convex portion that fits into the concave portion of the attached body is provided on the side.

  The said structure WHEREIN: The said earthing terminal is provided in the position shifted | deviated to one of the said attaching parts between the said attaching parts.

According to the terminal block of the present invention, since the grounding terminal is arranged on the line of the mounting surface connecting the mounting part, sufficient pressure can be applied to the grounding terminal, and the lifting due to the twisting of the terminal block or the instrument is reduced, so that conduction is ensured. can do. Because the mounting part is further moved toward the blade terminal, even if a large external force is applied to the housing via the electric wire, the connection part of the blade terminal is not damaged and the connection of the ground terminal is stabilized. Can do.

  Since the ground terminal is brought closer to one of the mounting portions, it is possible to reduce the floating due to the twist of the terminal block or the instrument.

  A power terminal block according to an embodiment of the present invention will be described with reference to FIGS. That is, this power terminal block houses terminals such as the quick connection terminal 2 in the housing 1 provided with the ground terminal 38.

  The housing 1 includes a resin body 3 and a resin cover 4. The body 3 has a shallow bottom box shape, and its periphery is composed of a front end wall 5, a rear end wall 6, and both side walls 7 and 8, and an outer surface of the bottom portion is a mounting surface 3a. The rear end wall 6 and the side walls 7 and 8 have the same height, but the front end wall 5 forms a step 9 that protrudes outwardly to the same height as the other walls. Further, a support wall 10 is erected from the tip of each of them. In the body 3, a plurality of strips 11, for example, four strips 11 are provided so as to connect the front end wall 5 and the rear end wall 6, and the center of the grooves formed between the partition walls 11 and the side walls 7, 8 is provided. The four strips excluding the grooves serve as terminal storage grooves 12. Terminal support slits 13 are formed in the support wall 10 so as to be positioned in these terminal storage grooves 12. Further, a recess 14 that narrows the width of the front end wall 5 is formed near the front end wall 5 of the one side wall 8. Further, cover mounting claws 15 are provided on both side walls 7 and 8 respectively.

  The cover 4 has a similar shape that meshes with the body 3, and is provided with a terminal pressing piece 16 that projects forward without covering the front surface of the front end wall 5. A connecting hole 46 for fitting the cover mounting claws 15 is formed on both side walls of the cover 4, and the mounting portion 17 is located above the opening end of the cover 4 and projects outward. A line A connecting the attachment portions 17 is disposed closer to the front end wall 5 than a center line B passing through the center of the attachment surface 3a. Reference numeral 18 denotes a screw insertion hole. Reference numeral 19 denotes a convex portion, which is used for positioning to prevent the displacement at the mounting portion 17 of the power terminal block due to the difference between the diameter of the screw insertion hole 18 and the diameter of the screw inserted therethrough. This reliably prevents the power supply terminal block from being moved by an external force applied when the electric wire is inserted into or removed from the quick connection terminal 2 and prevents deformation such as twisting when the blade-shaped terminal 36, which will be described later, is inserted. The purpose is to do.

  The upper surface of the cover 4 is formed in a waveform from the front end to the rear end. There are two corrugated peaks, and electric wire insertion holes 24a to 24d and 25a to 25d are formed on the inclined surfaces 20 and 22 of the inclined surfaces 20 to 23 facing the terminal pressing piece 16 respectively. These wire insertion holes 24 a to 24 d and 25 a to 25 d are formed so as to face the four terminal storage grooves 12 of the body 3. In this case, identification protrusions 26 are provided between the wire insertion holes 24c and 24d and in the wire insertion holes 25c and 25d. The identification protrusion 26 indicates that the wire insertion holes 24d and 25d located at the ends are for ground terminals, and facilitates identification from the power supply terminal wire insertion holes 24a to 24c and 25a to 25c. The other inclined surfaces 21 and 23 of the cover 4 are integrally formed with a wire release portion 28 so as to straddle the adjacent terminal storage grooves 12 of the body 3. Each electric wire release part 28 releases simultaneously the electric wire of the quick connection terminal 2 accommodated in the terminal storage groove 12 adjacent to each other.

  The quick connection terminal 2 is formed by an elongated conductive plate 30 stored in each terminal storage groove 12. The conductive plates 30 housed in the terminal housing grooves 12 on both sides of the body 3 are respectively provided with two terminal portions 31 corresponding to the corrugated peaks of the cover 4 on the sides opposite to the side walls 7 and 8 on opposite sides. Raised. The terminal portion 31 is formed with a locking piece 32, an electric wire connection portion 33 and an electric wire contact portion 34. The wire insertion portion between the locking piece 32 and the wire connection portion 33 is inclined so as to oppose the wire insertion holes 24 a, 24 d, 25 a, 25 d, and the inclined surfaces 21, 23 with the wire release portions 28 of the cover 4. Located inside. Therefore, when an electric wire is inserted from the electric wire insertion holes 24a, 24d, 25a, and 25d, the tip of the electric wire is inserted between the locking piece 32 and the electric wire connecting portion 33, and a connected state is brought into contact with the electric wire contact portion 34. . Further, when the electric wire release portion 28 is pushed in this state, the locking piece 32 is pressed, the biting of the locking piece 32 into the electric wire is released, and the electric wire can be pulled out.

Further, the blade terminal 36 is bent so as to rise from a side portion of one end portion accommodated on the front end wall 5 side of the body 3 of the conductive plate 30 . The blade terminal 36 extends forward in an inverted L shape from the front end of the conductive plate 30. The blade terminal 36 is inserted through the slit 13 of the support wall 10 in a state where the conductive plate 30 is housed in the terminal housing groove 12, and is positioned and prevented from being deformed. Further, a longitudinally long rib 37 is formed at the tip of the blade-shaped terminal 36, and the lower end of the rib 37 is located slightly above the lower end of the blade-shaped terminal 36, that is, the insertion end, that is, closer to the rear end, and the upper end is the blade-shaped terminal 36. It extends to the upper end (rear end).

The quick connection terminal 2 and the blade-shaped terminal 36 are raised from the same side portion of the conductive plate 30, and every other conductive plate 30 of the four conductive plates 30 arranged from the same side portion of the conductive plate 30. The terminal portion 31 and the blade-shaped terminal 36 are raised, and the terminal portion 31 and the blade-shaped terminal 36 of the adjacent conductive plate 30 are raised from the opposite side portion of the conductive plate 30 to have a symmetrical shape. Of the quick connection terminals 2, those stored in the terminal storage grooves 12 adjacent to the recesses 14 are for grounding, and others are for power supply or for feeding.

Further, the ground terminal of the quick connection terminals 2 is formed by bending a ground terminal 38 on the conductive plate 30 and projecting outside the mounting surface 3a through a slit 39 formed at the bottom of the body 7, and the body 7 is made of a metal mounting plate. At the time of attaching to the grounding plate, it is inserted into the grounding hole 60 to be the grounding terminal contact portion formed on the mounting plate and is press-contacted. The ground terminal 38 is disposed at a position close to one of the attachment portions 17 on the line A connecting the attachment portions 17 of the attachment surface 3a. For this reason, floating due to torsion of the power terminal block and the mounting plate 55 described later is reduced, and the ground terminal 38 can be reliably pressed into the ground hole 60. The grounding hole 60 is formed with a slit 76 at the edge where the grounding terminal 38 does not come into contact, thereby giving elasticity to the edge of the hole.

  The power terminal block is assembled by housing the quick connection terminal 2 in the body 3, passing the blade-shaped terminal 36 through the slit 13, passing the ground terminal 38 through the slit 39, and closing the cover 4 to the body 3. At this time, the lower surface of the terminal pressing piece 16 of the cover 4 is in contact with the upper end of the blade-shaped terminal 36. Here, if the protrusion 47 is provided on the lower surface of the terminal pressing piece 16 and the upper end side surface of the blade terminal 36 is supported by the side surface of the protrusion 47, the deformation of the blade terminal 36 can be prevented more reliably.

  The power supply terminal block is attached to the attachment plate 55 so as to be connected to the connector 40 of the printed circuit board provided on the metal attachment plate 55 of the vessel body to be attached. The positioning portions 50 are formed at substantially the center near the front and rear end portions of the body 3, respectively. The positioning portion 50 is formed by a hole, and the positioning receiving portion 56 of the mounting plate 55 is formed by a pin (not shown) that fits into the hole. The positioning portion 50 starts to be fitted to the positioning receiving portion 56 before the blade-shaped terminal 36 is inserted into the receiving portion (receiving blade) 41 of the connector 40, and the power terminal block is positioned to the mounting plate 55. While being positioned, the blade terminal 36 is inserted into the receiving portion 41 of the connector 40, the mounting surface 3 a of the body 3 is placed on the mounting plate 55, and the mounting plate 55 passes through the screw insertion hole 18 of the mounting portion 17 after the blade terminal 36 is pressed. Tighten the screw to the screw hole of the base-shaped mounting receiving part. At this time, by pressing the terminal pressing piece 16 of the cover 4, the blade-shaped terminal 36 can be reliably inserted into the receiving portion 41. Corresponding to the convex portion 19, a side wall is provided on the connector 40 or the mounting plate 55, and a concave portion for positioning the convex portion 19 is formed on the side wall.

  6 to 9 show a guide light luminaire. Reference numeral 65 denotes a body that can be attached to the ceiling or wall of a guide light illuminator, 66 is a circuit block mounted on the printed circuit board 66a, 67 is an attachment hole for wall attachment, and 68 is a wire insertion hole. As the diameter of the electric wire increases, it becomes difficult to perform the bending process. However, forming the electric wire insertion hole obliquely facilitates insertion. Reference numeral 77 denotes a side wall provided on the connector 40 or the mounting plate 55 and positioned on the front end side portion of the power terminal block and having a concave portion in which the convex portion 19 is positioned and fitted.

It is the perspective view which looked at the power terminal block of one embodiment of this invention from the back side. It is a bottom view of a power terminal block. It is a perspective view from the upper part of a power terminal block. It is a disassembled perspective view. (A) is a partial cross-sectional side view of the state before connection of a blade-shaped terminal, (b) is a perspective view showing a ground terminal and a grounding hole. It is an external appearance perspective view of a guide light lighting fixture. It is sectional drawing of the state which opened the cover of the container. It is a top view. It is a fragmentary perspective view which shows a circuit block and a power supply terminal block.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 2 Fast connection terminal 17 Attachment part 24a-24d Electric wire insertion hole 25a-25d Electric wire insertion hole 36 Blade-shaped terminal 38 Ground terminal 40 Connector 55 Mounting plate 60 Grounding hole

Claims (2)

A terminal block to be attached to the attachment receiving portion of the attached body provided with an earth contact portion , two attachment receiving portions and a recess, and has a mounting surface to be attached to the attached body on the bottom surface and is attached to the attachment receiving portion. A housing having a pair of mounting portions on both sides, and a plurality of terminals that are housed in the housing and connect electric wires,
The plurality of terminals are quick connection terminals, and the ground terminals connected to at least one of the plurality of terminals and in contact with the ground contact portion intersect with a line connecting the pair of mounting portions of the mounting surface. Projecting from the housing
The housing has a wire insertion hole corresponding to the quick connection terminal, and a blade partially exposed at the front end portion of the housing so as to be pressure-connected to a connector provided separately from the quick connection terminal A terminal holding piece abutting on an upper end of the blade-shaped terminal, the mounting portion and the ground terminal being arranged closer to the blade-shaped terminal side, and the blade-shaped terminal than the mounting portion The terminal block which provided the convex part fitted to the said recessed part of the said to-be-attached body in the side .   The terminal block according to claim 1, wherein the ground terminal is provided at a position shifted to one of the attachment portions between the attachment portions.

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