Electric wire insertion terminal board

Abstract

To provide an electric wire insertion terminal board in which a terminal is not easily deformed.SOLUTION: A terminal board 10 can insert an electric wire W. The terminal board 10 comprises: an insertion terminal 1; and a base housing 2. The insertion terminal 1 includes: a flat top plate part 11; and a front surface part 12 that is bent from one end part of the flat top plate part 11. Moreover the insertion terminal 1 is inverted from an end part of the front surface part 12 in a U-shape, and includes a pair of inversion parts 13 and 13 divided into two parts, and a square-like pressing part 14 formed on a tip end side of each inversion part 13. The base housing 2 includes a first mounting part 21m in a concave part 2d. In a state where an electric wire W is inserted into between a back surface of the top plate part 11 and the pressing part 14, a rear end part of the pressing part 14 exceeds a top of the first mounting part 21m, and a tip end edge of the rear end part of the pressing part 14 is contacted to an inclination surface 21s of the first mounting part 21m when the electric wire is pulled off, and the pulling-off of the electric wire W is prevented.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an electric wire insertion terminal block, and more particularly to a structure of an electric wire insertion terminal block in which an end of an electric wire is directly inserted between a plate spring and a conductor plate. [Background technology]

[0002] To facilitate electrical connection between multiple conductors, including electric wires, there is known an electric wire insertion terminal block that is designed to connect, relay, and branch electric wires by directly inserting the ends of the electric wires between a plate spring and a conductor plate (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-169332 A Summary of the Invention [Problem to be solved by the invention]

[0004] The wire insertion terminal block (hereinafter referred to as the terminal block) according to Patent Document 1 claims that when an electric wire is inserted between a conductive fixed terminal and an inclined spring terminal, the tip edge of the spring terminal presses the electric wire against the fixed terminal, thereby locking the electric wire.

[0005] The terminal block according to Patent Document 1 has a stopper (barrier) provided on the rear side of the tip end side of the spring terminal to prevent the tip end side of the spring terminal from being excessively displaced when a force is applied in the direction of pulling out the electric wire.

[0006] However, in the terminal block of Patent Document 1, there is a considerable distance between the tip side of the spring terminal and the abutment surface of the stopper, and there is a concern that the tip side of the spring terminal may be deformed if the electric wire is pulled out with a great deal of force.

[0007] There is a need for an electric wire insertion terminal block in which the electric wire can be easily inserted and in which the spring terminal is not easily deformed when the electric wire is pulled out.

[0008] The present invention has been made in consideration of such problems, and has an object to provide an electric wire insertion terminal block in which the electric wire can be easily inserted and the spring terminal is not easily deformed when the electric wire is pulled out. [Means for solving the problem]

[0009] The inventors conceived the idea that by molding the plug-in terminal as a single unit so that an electric wire can be inserted between the back surface of the top plate and the square pressing portion that presses against the top plate, and by providing the housing that holds the plug-in terminal with a mountain-like protruding ridge that protrudes from the bottom surface of the recess, when the electric wire is inserted, the rear end of the pressing portion overcomes the top of the ridge, and when the electric wire is pulled out, the tip edge of the rear end of the pressing portion abuts against the sloping surface of the ridge to prevent the electric wire from being pulled out, thereby preventing the plug-in terminal from easily deforming, and thus completed a new wire plug-in terminal block that solves the above-mentioned problems.

[0010] (1) An electric wire plug-in terminal block into which an end of an electric wire can be plugged, comprising a bellows-shaped plug-in terminal formed by bending a belt-shaped metal plate, and a rectangular parallelepiped base housing in which the plug-in terminal is mounted in a recess, the plug-in terminal having a flat top plate portion with a convex opening at the center in the width direction on one end side, a front portion bent at a substantially right angle from one end of the top plate portion, a pair of inverted portions inverted into a U-shape from the end of the front portion and branched into two, and a pair of inverted portions inclined upward from the ends of these inverted portions toward the top plate portion, with leading edges a pressing portion that presses the back surface of the top plate portion, the pressing portion having a rectangular shape that expands in the width direction from the inverted portion; the base housing has a first ridge portion that is formed in the center of the width direction of the recess and protrudes like a mountain; when an electric wire is inserted between the back surface of the top plate portion and the pressing portion, the rear end portion of the pressing portion overcomes the top of the first ridge portion; and when a force is applied to pull the electric wire out of the base housing, the tip edge of the rear end portion of the pressing portion abuts against the inclined surface of the first ridge portion, preventing the electric wire from being pulled out.

[0011] (2) The wire insertion terminal block described in (1) further comprises a cover housing that covers the recess of the base housing and engages with the base housing, the cover housing having a pair of wire insertion holes that open toward the area between the back surface of the top plate portion and the pressing portion.

[0012] (3) The wire insertion terminal block according to (1) or (2), wherein the base housing further has a pair of second ridges formed on both sides of the first ridge, and these second ridges cooperate with the first ridge to prevent the wire from being pulled out.

[0013] (4) The wire insertion terminal block described in (2) above, wherein the cover housing further has an unlocking lever supported at one end by a pair of elastic arms, and the unlocking lever passes through an opening in the top plate portion and has a convex portion formed on the back surface at the tip side that can press down on the pair of pressing portions. Effect of the Invention

[0014] In the electric wire plug terminal block of the present invention, when an electric wire is pulled out, the leading edge of the rear end of the square pressing portion abuts against the inclined surface of the peak portion to prevent the electric wire from being pulled out, thereby suppressing deformation of the plug terminal. [Brief description of the drawings]

[0015] [Figure 1] 1 is a perspective view showing a configuration of an electric wire insertion terminal block according to an embodiment of the present invention; [Diagram 2] FIG. 2 is an exploded perspective view showing the configuration of the electric wire insertion terminal block according to the embodiment. [Diagram 3] FIG. 2 is a perspective view showing the configuration of the electric wire insertion terminal block according to the embodiment, as viewed from the front side. [Figure 4] FIG. 2 is a perspective view showing the configuration of the electric wire insertion terminal block according to the embodiment, as viewed from the rear side. [Diagram 5] 5A and 5B are diagrams showing the configuration of a base housing provided in the wire insertion terminal block according to the embodiment, where FIG. 5(A) is a front view of the base housing, FIG. 5(B) is a plan view of the base housing, FIG. 5(C) is a bottom view of the base housing, FIG. 5(D) is a right side view of the base housing, and FIG. 5(E) is a perspective view of the base housing. [Figure 6] 6A and 6B are diagrams showing the configuration of a plug-in terminal provided in an electric wire plug-in terminal block according to the embodiment, in which FIG. 6(A) is a front view of the plug-in terminal, FIG. 6(B) is a plan view of the plug-in terminal, FIG. 6(C) is a bottom view of the plug-in terminal, FIG. 6(D) is a right side view of the plug-in terminal, and FIG. 6(E) is a perspective view of the plug-in terminal. [Figure 7] 7A to 7E are diagrams showing the configuration of a cover housing provided in the wire insertion terminal block according to the embodiment, where FIG. 7A is a front view of the cover housing, FIG. 7B is a plan view of the cover housing, FIG. 7C is a bottom view of the cover housing, FIG. 7D is a right side view of the cover housing, and FIG. 7E is a perspective view of the cover housing. [Figure 8]8(A) and 8(B) are cross-sectional views showing the configuration of the wire insertion terminal block according to the embodiment, where FIG. 8(A) corresponds to the A'-A' cross-section of FIG. 7(A), FIG. 8(B) corresponds to the B'-B' cross-section of FIG. 7(A), FIG. 8(C) corresponds to the C'-C' cross-section of FIG. 7(A), and FIG. 8(D) corresponds to the D'-D' cross-section of FIG. 7(B). [Figure 9] 9(A) is a cross-sectional view showing the configuration of the electric wire insertion terminal block according to the embodiment, FIG. 9(A) is a state diagram showing the state where the tip side of the lock release lever is pressed down from the state shown in FIG. 7(A), FIG. 9(B) is a state diagram showing the state where the tip side of the lock release lever is pressed down from the state shown in FIG. 7(B), FIG. 9(C) is a vertical cross-sectional view of the electric wire insertion terminal block, and FIG. 9(D) is a horizontal cross-sectional view of the electric wire insertion terminal block. [Figure 10] FIG. 13 is a perspective view showing a configuration of an electric wire insertion terminal block according to a modified example. [Figure 11] 13 is a perspective view showing a configuration of a base housing provided in a modified electric wire insertion terminal block. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. [Configuration of the electric wire insertion terminal block] First, the configuration of an electric wire insertion terminal block according to an embodiment of the present invention will be described.

[0017] (Overall composition) 1 to 4, an electric wire plug-in terminal block (hereinafter, simply referred to as terminal block) 10 according to an embodiment of the present invention is capable of plugging in two electric wires. The terminal block 10 includes a bellows-type plug-in terminal 1, a rectangular parallelepiped base housing 2, and a cover housing 3.

[0018] 2 to 6, the plug-in terminal 1 is formed by bending a strip-shaped metal plate. The plug-in terminal 1 is mounted in a recess 2d of the base housing 2 (see FIG. 2). The cover housing 3 covers the recess 2d of the base housing 2 and can be fitted to the base housing 2.

[0019] (Plug-in terminal configuration) Next, the configuration of the plug-in terminal 1 will be described. Referring to Fig. 2 or 6, the plug-in terminal 1 is made of a conductive metal plate, and a desired shape of the plug-in terminal can be obtained by folding and forming a stamped, strip-shaped developed plate (not shown). The plug-in terminal 1 is preferably made of a conductive metal plate such as a copper alloy, but is not limited to a copper alloy.

[0020] 2 or 6, plug-in terminal 1 has a flat top plate portion 11 and a front surface portion 12. Plug-in terminal 1 also has a pair of bifurcated inverted portions 13 / 13 and rectangular pressing portions 14 / 14. Plug-in terminal 1 further has a connecting portion 11c to which an electric wire is connected.

[0021] 2 or 6, flat top plate 11 has a convex opening 11a at the center in the width direction on one end side. The wide portion of opening 11a extends to front plate 12. Front plate 12 is bent at a substantially right angle from one end of top plate 11. A pair of inverted portions 13·13 are inverted in a U-shape from the end of front plate 12 and branch into two.

[0022] 2 or 6, the pressing portion 14 is inclined upward from the end of the inverted portion 13 toward the back surface of the top plate portion 11. The tip edge of the pressing portion 14 presses the back surface of the top plate portion 11. The pressing portion 14 also expands in a rectangular shape in the width direction from the inverted portion 13.

[0023] 2 or 6, in the embodiment, the connection portion 11c has a bellows shape that presses against a contact surface provided on the connection body to which the electric wire is connected, but the connection portion 11c may be provided with a female screw to which a crimp terminal can be attached, or may be a solder terminal for connection to a printed circuit board.

[0024] (Base housing configuration) Next, a description will be given of the configuration of the base housing 2. Referring to Fig. 2 or 5, the base housing 2 is made of an insulating synthetic resin, and the base housing 2 can be obtained in a desired shape by molding the insulating synthetic resin.

[0025] 2 or 5, the base housing 2 has a first mountain portion 21m that protrudes in a mountain shape. The first mountain portion 21m is formed in the center of the recess 2d in the width direction. The first mountain portion 21m forms an inclined surface 21s against which the tip edge of the rear end portion of the pressing portion 14 abuts when a force is applied to pull out the electric wire W from the base housing 2 (see FIG. 5(D) or FIG. 5(E)).

[0026] The base housing 2 has a pair of U-shaped locking portions 22 / 22 opening on both side surfaces (see FIG. 2 or FIG. 5(E)). The pair of locking portions 22 / 22 are arranged facing opposite directions. These locking portions 22 / 22 can be engaged with a pair of lances 3r / 3r (see FIG. 7(A) or FIG. 7(C)) provided on the cover housing 3, thereby locking the cover housing 3 to the base housing 2 (see FIG. 3).

[0027] (Cover housing configuration) Next, a description will be given of the configuration of the cover housing 3. Referring to Fig. 2 or 7, the cover housing 3 is made of an insulating synthetic resin, and the cover housing 3 having a desired shape can be obtained by molding the insulating synthetic resin.

[0028] 2 to 5, the cover housing 3 can be fitted to the base housing 2. The cover housing 3 can cover the recess 2d of the base housing 2. Referring to FIG. 3 or FIG. 7(A) and FIG. 8(C), the cover housing 3 has an electric wire insertion hole 3h that opens to the front. An electric wire W can be inserted into the electric wire insertion hole 3h. The electric wire insertion hole 3h opens toward the space between the back surface of the top plate portion 11 and the pressing portion 14 (see FIG. 8(A)).

[0029] 7(A) or 8(A) and 8(B), the cover housing 3 has a pair of U-shaped lances 3r protruding from the inner walls of both side surfaces. These lances 3r are arranged opposite each other. Referring to FIG. 2, when the cover housing 3 is pushed into the recess 2d of the base housing 2, both side surfaces of the cover housing 3 expand slightly and the pair of lances 3r fit into the locking portions 22 (see FIG. 2 or FIG. 5(E)), thereby fitting the cover housing 3 to the base housing 2.

[0030] (Unlock lever configuration) 2, 3 and 7, the cover-housing 3 has an unlocking lever 32 formed on its upper portion. The unlocking lever 32 is cantilevered on the upper portion of the cover-housing 3 by a pair of elastic arms 32a (see FIG. 8(A)).

[0031] 4, 8(B), and 9(B), the unlocking lever 32 has a protrusion 32c formed on the reverse side of the tip end. When the tip end of the unlocking lever 32 is pressed down, the protrusion 32c passes through the opening 11a (see FIG. 2) of the top plate 11 and is configured to be able to press down the pair of pressing portions 14, 14. This allows the electric wire W to be easily pulled out from the terminal block 10.

[0032] [Function of the electric wire insertion terminal block] Next, the function and effect of the terminal block 10 will be described while explaining the operation of the terminal block 10. Referring to Fig. 3, when an electric wire W is inserted into a pair of electric wire insertion holes 3h·3h, the electric wire W is guided by the electric wire insertion holes 3h and can be inserted between the back surface of the top plate portion 11 and the pressing portion 14. This allows the electric wire W and the plug-in terminal 1 to be electrically connected.

[0033] Since the pair of pressing portions 14·14 are displaced independently of each other, it is possible to insert only one electric wire W into one pair of electric wire insertion holes 3h·3h. However, inserting a pair of electric wires W·W into the terminal block 10 ensures a more reliable connection between the electric wire W and the plug-in terminal 1. Being able to insert two electric wires W does not necessarily mean using two electric wires W. The terminal block 10 according to the embodiment can be practically used with a single electric wire W without any problems, and by using two electric wires W, when one electric wire W is broken, the other electric wire W can be used as a backup.

[0034] Referring to Figure 9(A), when an electric wire W is inserted between the back surface of the top plate portion 11 and the pressing portion 14, the rear end portion of the pressing portion 14 climbs over the top of the first peak portion 21m (see Figure 5(E)) and tilts (see Figure 9(A)).

[0035] When a force is applied to pull out the electric wire W from the state shown in Fig. 9(A), the pressing portion 14 moves parallel to the insertion direction of the electric wire W, so that the leading edge of the rear end of the pressing portion 14 abuts against the inclined surface 21s of the first mountain portion 21m (see Fig. 9(B)). This makes it possible to prevent the electric wire W from being pulled out. In the terminal block 10 according to the embodiment, the pressing portion 14 is sandwiched between the electric wire W and the inclined surface 21s of the first mountain portion 21m and is subjected to compressive stress, which has the effect that the pressing portion 14 is not easily deformed.

[0036] On the other hand, when pulling out the electric wire W from the terminal block 10, referring to Figure 9 (A), by pressing down the tip side of the lock release lever 32, the convex portion 32c passes through the opening 11a (see Figure 2) of the top plate portion 11 and presses down the pair of pressing portions 14·14, so that the electric wire W can be pulled out from the terminal block 10.

[0037] [Base housing modification] Next, a configuration of a base housing according to a modified example of the present invention will be described.

[0038] 10 and 11, a base housing 5 according to a modified example of the present invention has a first crest 51m protruding like a mountain and a pair of second crests 52m·52m formed on both sides of the first crest 51m and protruding like a mountain. A plug-in terminal 1 is mounted on the base housing 5. The first crest 51m is formed in the center in the width direction of the recess 5d. The first crest 51m has an inclined surface 51s against which the tip edge of the rear end of the pressing portion 14 abuts when a force is applied to pull out the electric wire W from the base housing 5.

[0039] 10 and 11, a pair of second peaks 52m are formed on both side surfaces of the base housing 5. The pair of second peaks 52m form inclined surfaces 52s against which the leading edges of the rear ends of the pair of pressing portions 14 come into contact when a force is applied to pull out the electric wire W from the base housing 5 (see FIG. 11). A pair of locking portions 52 are provided on both side surfaces of the base housing 5, to which the cover housing 3 can be fitted.

[0040] 10 and 11, the base housing 5 according to the modified example has three mountain-shaped protruding portions arranged in three locations, which has a special effect of more reliably preventing the electric wires from being pulled out.

[0041] If two electric wire plug-in terminal blocks according to the present invention are used in an electric device, they can be used as the positive and negative poles of a power source. [Explanation of symbols]

[0042] 1 Plug terminal 2 Base Housing 2d recess 3 Cover housing 10 Terminal block (wire insertion terminal block) 11 Top plate 11a opening 12 Front part 13·13 A pair of inverted parts 14 Pressing section 21m First mountain section 21s slope W electric wire

Claims

1. A wire insertion terminal block into which an end of an electric wire can be inserted, A bellows-shaped plug terminal made by bending a strip of metal sheet; a rectangular parallelepiped base housing having the plug-in terminal mounted in a recess, The plug terminal is A flat top plate portion having a convex opening at a center portion in a width direction on one end side; A front surface portion bent at a substantially right angle from one end of the top plate portion; A pair of inverted portions inverted into a U-shape from an end of the front portion and branched into two; The pressing portion is a rectangular pressing portion that is inclined upward from the end of the inverted portion toward the top plate portion and has a tip edge that presses the back surface of the top plate portion, and expands in the width direction from the inverted portion, the base housing has a first mountain portion formed in a widthwise center portion of the recess and protruding in a mountain shape, When an electric wire is inserted between the rear surface of the top plate portion and the pressing portion, a rear end of the pressing portion passes over the top of the first peak portion, When a force is applied to pull the electric wire out of the base housing, the tip edge of the rear end of the pressing portion abuts against the inclined surface of the first peak portion to prevent the electric wire from being pulled out.

2. a cover housing that covers the recess of the base housing and engages with the base housing; 2. The wire insertion terminal block according to claim 1, wherein the cover housing has a pair of wire insertion holes that open toward a portion between the rear surface of the top plate and the pressing portion.

3. The base housing further includes a pair of second mountain portions formed on both sides of the first mountain portion, 3. The wire insertion terminal block according to claim 1, wherein the second crests cooperate with the first crests to prevent the wires from being pulled out.

4. The cover housing further includes a lock release lever that is cantilevered at an upper portion by a pair of elastic arms, 3. The electric wire insertion terminal block according to claim 2, wherein the unlocking lever has a protrusion formed on a rear surface at a tip end thereof, the protrusion being capable of passing through the opening in the top plate portion and depressing the pair of pressing portions.

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