JP7089702B2 - Terminal block and wire distribution unit - Google Patents

Description

The techniques disclosed herein relate to terminal blocks and wire routing units.

For example, as a terminal block for connecting a connection terminal connected to a terminal of an electric wire and a circuit terminal provided in an apparatus, those described in Japanese Patent Application Laid-Open No. 2017-004874 (Patent Document 1 below) are known. .. This terminal block electrically connects the connection terminal and the circuit terminal by fastening the connection terminal and the circuit terminal with terminal bolts and nuts.

Japanese Unexamined Patent Publication No. 2017-004874

By the way, when the electric wire connected to the connection terminal is used for high current and high voltage, for example, the electric wire thermally expands or contracts due to heat generated by the electric wire itself or heat transmitted from the connection destination. When an electric wire thermally expands or contracts, the connection terminal connected to the electric wire is pushed and pulled in the axial direction of the electric wire, stress concentrates on the contact portion between the connection terminal and the circuit terminal, and a defect occurs in the contact portion. ..

This specification discloses a technique for suppressing the occurrence of a defect in the contact portion between the connection portion provided in the terminal of the electric wire and the connection portion on the other side.

The technique disclosed herein is a terminal block that electrically connects a connection portion provided in a terminal of an electric wire and a connection portion on the other side, and the connection portion and the connection portion on the other side come into contact with each other. The contact arrangement portion is arranged so as to be connected to the contact arrangement portion, and the electric wire is arranged so as to be elastically displaceable between the electric wire installation portion and the electric wire installation portion and the electric wire. It is configured to include a stress relaxation portion for bending and holding the electric wire with a clearance between the electric wire and the electric wire installation portion.

According to the technique disclosed in the present specification, it is possible to prevent a defect from occurring in the contact portion between the connection portion provided in the terminal of the electric wire and the connection portion on the other side.

It is a perspective view of the electric wire distribution unit which concerns on Embodiment 1. FIG. It is a top view of the electric wire distribution unit. FIG. 2 is a cross-sectional view taken along the line AA of FIG. It is a perspective view of the terminal block which concerns on Embodiment 1. FIG. It is a top view of a terminal block. It is a rear view of a terminal block. It is a top view which shows the state which one electric wire was thermally expanded in the electric wire distribution unit. FIG. 7 is a cross-sectional view taken along the line BB of FIG. It is a top view which shows the state which one electric wire was heat-shrinked in the electric wire distribution unit. 9 is a cross-sectional view taken along the line CC of FIG. It is a perspective view of the electric wire distribution unit which concerns on Embodiment 2. FIG. It is a top view of the electric wire distribution unit. FIG. 12 is a sectional view taken along line DD of FIG. It is a perspective view of the terminal block which concerns on Embodiment 2. FIG. It is a perspective view of the electric wire distribution unit which concerns on Embodiment 3. FIG. It is a top view of the electric wire distribution unit. It is an exploded perspective view of the electric wire distribution unit. 16 is a cross-sectional view taken along the line EE of FIG. It is sectional drawing which shows the set state before bolting the terminal.

<Explanation of Embodiments of the present disclosure>
First, embodiments of the present disclosure will be listed and described.
(1) The technique disclosed in the present specification is a terminal block that electrically connects a connection portion provided in a terminal of an electric wire and a connection portion on the other side, and the connection portion and the connection portion on the other side are connected. A contact arrangement portion that is arranged in contact with the electric wire, an electric wire installation portion that is provided in series with the contact arrangement portion and in which the electric wire is arranged, and an elastically displaceable arrangement between the electric wire installation portion and the electric wire. It is configured to include a stress relaxation portion for bending and holding the electric wire with a clearance between the electric wire and the electric wire installation portion.

According to the terminal block having such a configuration, when the electric wire thermally expands due to heat generation or the like, the electric wire is further bent starting from the already bent portion, and the stress relief portion is elastically displaced, so that the electric wire and the electric wire installation portion are formed. The electric wire enters the clearance formed between the and. As a result, it is possible to absorb the extra length of the coated electric wire extended by thermal expansion.
On the other hand, when the electric wire is thermally shrunk due to cooling or the like, the stress relaxation portion is elastically displaced, so that the electric wire enters into the clearance formed between the electric wire and the electric wire installation portion, and the bent electric wire becomes straight. Become a target. As a result, it is possible to suppress the application of tensile stress in the axial direction to the electric wire. Therefore, it is possible to suppress the application of stress to the contact portion between the connection portion and the mating connection portion due to the thermal expansion or contraction of the electric wire. That is, when the electric wire thermally expands or contracts, it is possible to suppress the occurrence of a defect in the contact portion between the connection portion and the mating connection portion.

The terminal block disclosed by the present specification may have the following configuration.
(2) The electric wire installation portion has a plurality of side wall portions arranged along the electric wire, and the stress relaxation portion is elastic in the direction intersecting the axial direction of the electric wire in the plurality of side wall portions. It may be configured to be displaceably provided and have a plurality of elastic portions that hold the electric wire in a bent state so as to have a clearance between the electric wire and the side wall portion.

According to such a configuration, the electric wire can be bent and held by the plurality of elastic portions between the plurality of side wall portions. When the electric wire expands thermally, the elastic portion is elastically displaced so that the electric wire enters the clearance between the electric wire and the side wall portion, and when the electric wire is thermally contracted, the stress relaxation portion is elastically displaced. By doing so, the electric wire enters the clearance between the electric wire and the side wall portion, and the bent electric wire becomes linear. As a result, it is possible to prevent stress from being generated at the contact portion between the connection portion and the mating connection portion regardless of whether the electric wire is in a state of thermal expansion or thermal contraction.

(3) The plurality of side wall portions are a pair of side wall portions arranged on both sides of the electric wire, and the plurality of elastic portions are a pair of elastic portions provided in the same region in the axial direction of the electric wire. There may be a configuration in which one of the pair of elastic portions is a large elastic portion that protrudes toward the electric wire more than the other.
(4) Further, the electric wire installation portion has a bottom wall portion on which the electric wire is placed and the pair of side wall portions extending from the bottom wall portion, and the pair of elastic portions are formed by the pair of elastic portions. It may be formed so as to project cantilever from the side wall portion toward the electric wire.

According to such a configuration, the electric wire arranged between the pair of side wall portions can be bent by the pair of elastic portions. Therefore, as compared with the case where the number of elastic portions is three or more, the terminal block configuration is configured. Can be simplified.

Further, since the pair of elastic portions are arranged in the same region in the axial direction, the stress relaxation portion is miniaturized in the axial direction as compared with the case where the pair of elastic portions are arranged offset in the axial direction, for example. be able to. As a result, the terminal block can be miniaturized in the axial direction.

By the way, when a pair of elastic portions are arranged in the same region in the axial direction and the pair of elastic portions come into contact with the electric wire from both sides in the axial direction, there is a concern that the electric wire cannot be bent. However, according to such a configuration, since one of the pair of elastic portions is a large elastic portion that protrudes toward the electric wire more than the other, the large elastic portion reliably bends the electric wire toward the other side. Can be made to.

Further, since the pair of elastic portions are formed so as to project cantilever from the side wall portion toward the electric wire, the ratio of bending the electric wire can be easily changed by changing the protruding dimension of the pair of elastic portions from the side wall portion. Can be adjusted.

(5) The pair of elastic portions may be cantilevered in a direction intersecting the bottom wall portion.
According to such a configuration, for example, when a pair of elastic parts extend in a cantilever shape in a downward direction intersecting a bottom wall portion, a pair of elastic parts extend in a cantilever shape in the axial direction of an electric wire. The length dimension of the electric wire in the elastic portion in the axial direction can be shortened. As a result, the stress relaxation portion and, by extension, the terminal block can be miniaturized in the axial direction of the electric wire.

(6) The connection portion has a flat plate shape, and abuts on the surface of at least both side edges of the connection portion to position the connection portion in the normal direction and the back surface of the connection portion. It may be configured to include an elastic pressing portion for urging the connecting portion.
According to such a configuration, when the connection portion is set on the terminal block, the surface of the flat plate-shaped connection portion urged toward the positioning portion by the elastic pressing portion abuts on the positioning portion at least at both side edges. .. This prevents the so-called connection portion twisting direction displacement, in which the connection portion is displaced in the direction of rotation around the axis of the electric wire. That is, when a force in the twisting direction is applied to the flat plate-shaped connection portion, one of both side edges of the connection portion is displaced diagonally upward, but the connection portion is pushed back by abutting against the positioning portion. Positioned in the correct orientation.
In particular, according to the terminal block of the present disclosure, it is conceivable that a force in the twisting direction may be applied to the connection portion due to the bending and holding of the electric wire in the stress relaxation portion. Further, even when the diameter of the electric wire is large and the bending is strong, it is possible that a force in the twisting direction is applied to the connection portion. In such a case, even if one of the both side edges of the flat plate-shaped connection portion tries to be displaced in the twisting direction, it is held in the normal direction by being pushed back in contact with the positioning portion, and the connection portion is held. The occurrence of twisting can be advantageously prevented.
As a result, the connection portion is positioned so as to be arranged in a regular direction with respect to the contact arrangement portion, and the connection work of the connection portion with the mating side connection portion becomes easy. Further, the action of stress due to the rotational displacement of the connection portion in the torsional direction on the connection portion between the connection portion and the mating connection portion is also avoided.

(7) Legs that are arranged on both sides of the connection portion in the width direction and can be elastically deformed are provided on the outside of the connection portion in the width direction, and the positioning portion is formed so as to project from the leg portion. It may be configured as such.
According to such a configuration, for example, when the connection portion is pushed while pressing both end portions on the back surface side of the connection portion against the positioning portion, the legs are elastically deformed outward in the width direction of the connection portion, and the positioning portion is connected. Move outward in the width direction of the part. As a result, the connecting portion can be inserted between the positioning portion and the elastic pressing portion by a simple operation of pushing the connecting portion.
It should be noted that preferably, the positioning portion is provided with a pressing guide surface that elastically deforms the elastic leg portion by pressing the connecting portion to move the positioning portion to the outside in the width direction of the connecting portion. ing. As a result, by pushing the connection portion while pressing both end portions on the back surface side of the connection portion against the pressing guide surface of the positioning portion, the legs are easily elastically deformed outward in the width direction of the connection portion, and the connection portion is positioned. It can be more easily inserted between the portion and the elastic pressing portion.

(8) The elastic pressing portion may be integrally formed with the contact arrangement portion.
With such a configuration, the number of parts can be reduced and the structure can be simplified.

(9) The positioning portion may be provided on both sides of the connection portion in the length direction with respect to the elastic pressing portion.
According to such a configuration, in a state where the connecting portion is pressed against the positioning portion by the elastic pressing portion, the displacement of the connecting portion in the twisting direction is less likely to occur. In this way, not only the displacement in the twisting direction but also the displacement in the prying direction is restricted, so that the connecting portion can be easily held in the regular set state positioned in the regular direction with respect to the contact arrangement portion. Become.

The contact arrangement portion may be provided with a guide surface for guiding the connection portion when the connection portion is attached.
According to such a configuration, since the connection portion is guided to the regular setting position in the contact arrangement portion by the guide surface, the mounting work for setting the connection portion in the contact arrangement portion becomes easy.

(10) The technique disclosed in the present specification includes the terminal block and a surrounding portion for accommodating the electric wire drawn from the electric wire installation portion of the terminal block to the side opposite to the contact arrangement portion. The electric wire distribution unit has a structure in which the electric wire housed in the enclosure and the wall of the enclosure are arranged in close proximity to each other.

The electric wire housed in the enclosure and close to the wall is in close contact with the wall. Therefore, when the electric wire is thermally expanded, the electric wire housed in the surrounding portion cannot be bent, and the amount of thermal expansion of the electric wire is cumulatively extended to the position of the electric wire installation portion of the terminal block.

That is, when the wall portion of the surrounding portion accommodating the electric wire and the electric wire are close to each other, the technique of absorbing the extra length of the thermally expanded electric wire by the stress relaxation portion is very effective.

<Details of Embodiments of the present disclosure>
Specific examples of the terminal block and the electric wire distribution unit of the present disclosure will be described below with reference to the drawings. It should be noted that the present invention is not limited to these examples, and is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

<Embodiment 1>
Embodiment 1 of the techniques disclosed herein will be described with reference to FIGS. 1-10.
This embodiment exemplifies an electric wire distribution unit 10 connected to a device-side connection portion (an example of a "counterpart-side connection portion") T of a device mounted on a vehicle.
As shown in FIGS. 1 and 2, the device-side connection portions T have a flat plate shape and are arranged side by side in a pair in the left-right direction.
As shown in FIGS. 1 and 2, the electric wire distribution unit 10 includes a pair of coated electric wires 20, a pair of terminals 30 connected to a terminal on the front side of the pair of coated electric wires 20, and a front side of the pair of coated electric wires 20. It is configured to include a terminal block 40 in which the terminal portion of the above and a pair of terminals 30 are arranged, and a surrounding portion 60 for accommodating a coated electric wire 20 drawn rearward from the terminal block 40.

The coated electric wire 20 is formed by covering a core wire 22 made of a conductive stranded wire with an insulating coating 24 having an insulating property. As the core wire 22, any material such as copper, copper alloy, aluminum, or aluminum alloy can be adopted. The front end of the covered electric wire 20 is in a state where the insulating coating 24 is peeled off and the core wire 22 is exposed.

The terminal 30 is formed by processing a conductive metal plate material by a press or the like, and is formed to have a smaller cross-sectional area than the coated electric wire 20. As the terminal 30, any one such as copper, copper alloy, aluminum, or aluminum alloy can be adopted. The terminal 30 includes a terminal connection portion (an example of a “connection portion”) 32 connected to the device-side connection portion T, and a wire connection portion 34 connected to the core wire 22 of the covered electric wire 20.

The terminal connection portion 32 has a flat plate shape, and the electric wire connection portion 34 is formed in a row behind the terminal connection portion 32.
The electric wire connecting portion 34 has a pair of barrels 35, and is electrically connected to the front end portion of the coated electric wire 20 by crimping the pair of barrels 35 to the core wire 22 of the coated electric wire 20.

The terminal block 40 is roughly formed of synthetic resin, and includes a mounting plate 41 having a substantially square shape in a plan view and a pair of contact arrangement portions 50 projecting forward from the mounting plate 41. The mounting plate 41 has a flat plate shape, and metal collars 42 through which mounting bolts (not shown) are inserted are embedded in the four corners of the mounting plate 41.

The substantially central portion of the mounting plate 41 in the left-right direction is an electric wire installation portion 44 in which a pair of covered electric wires 20 are arranged in a state of extending in the front-rear direction.

The electric wire installation portion 44 includes a bottom wall portion 45 that is long in the front-rear direction and a plurality of side wall portions 46 that extend upward from the bottom wall portion 45.
The bottom wall portion 45 is formed over the entire length of the mounting plate 41 in the front-rear direction, and the wire connection portion 34 of the pair of terminals 30 and the front end portion of the pair of covered electric wires 20 are located on the bottom wall portion 45 in the left-right direction. It is said that it can be placed side by side.

The plurality of side wall portions 46 are provided at a total of three locations, between the pair of covered electric wires 20 mounted on the bottom wall portion 45 and on both sides of the pair of coated electric wires 20 in the left-right direction.
Each side wall portion 46 has a form extending linearly in the front-rear direction along the covered electric wire 20, and is formed over the entire length of the bottom wall portion 45 in the front-rear direction.

Of the plurality of side wall portions 46, the central side wall portion 46A arranged between the pair of covered electric wires 20 has a larger plate thickness than the outer wall portions 46B arranged on both sides of the pair of coated electric wires 20 in the left-right direction. Has been done. Further, the central side wall portion 46A protrudes forward from the mounting plate 41, and extends to the front end position of the terminal connection portion 32 in the pair of terminals 30 protruding forward from the bottom wall portion 45. Therefore, the central side wall portion 46A is an insulating wall for insulating between the pair of terminals 30 arranged on the bottom wall portion 45.

Further, the dimension in the left-right direction between the central side wall portion 46A and the outer wall portion 46B is set to be larger than the outer diameter dimension of the covered electric wire 20, and is covered between the central side wall portion 46A and the outer wall portion 46B. When the electric wire 20 is arranged, a clearance CL is formed between the coated electric wire 20 and the respective side wall portions 46.
That is, as shown in FIGS. 1 to 10, the electric wire installation portion 44 has two electric wire wiring paths 47 composed of a bottom wall portion 45, a central side wall portion 46A, and an outer wall portion 46B. When the covered electric wire 20 is installed in the electric wire distribution path 47, a clearance CL is formed between the respective side wall portions 46 and the coated electric wire 20 as shown in FIGS. 1 and 2. ..

The pair of contact arrangement portions 50 have a flat plate shape. The pair of contact arrangement portions 50 are configured to project forward from the front end edge of the mounting plate 41 along the central side wall portion 46A, and each contact arrangement portion 50 is the central side wall portion 46A of the electric wire installation portion 44. It is connected to the leading edge and the central side wall portion 46A of the bottom wall portion 45 arranged between the outer wall portion 46B and the outer wall portion 46B.

As shown in FIGS. 4 to 6, nut N is fixed to the front end of each contact arrangement portion 50, and the terminal connection portion 32 of the terminal 30 and the device side connection portion T are on the nut N. Can be placed on top of each other. As shown in FIGS. 1 and 2, the fastening bolt B is inserted through the terminal connection portion 32 arranged so as to be overlapped on the nut N and the device side connection portion T and tightened to the nut N to form the terminal connection portion 32. The connection portion T on the device side is electrically connected.

On the other hand, the pair of covered electric wires 20 drawn rearward from the rear end of the electric wire installation portion 44 are housed in the electric wire accommodating portion 61 provided in the surrounding portion 60.
The electric wire accommodating portion 61 is composed of four wall portions 62 that cover each covered electric wire 20 from four directions of up, down, left, and right, and each covered electric wire 20 is individually surrounded by the four wall portions 62. ing. Each wall portion 62 in the electric wire accommodating portion 61 is arranged close to the coated electric wire 20, and each wall portion 62 and the coated electric wire 20 are in close contact with each other.

As shown in FIGS. 1 to 6, a covered electric wire 20 is provided between the covered electric wire 20 mounted on the bottom wall portion 45 and the outer wall portion 46B and the central side wall portion 46A in the electric wire installation portion 44. The stress relaxation portions 70 that are bent and held are arranged respectively.
The stress relaxation portion 70 is configured to include a plurality of elastic portions 72 provided on the outer wall portion 46B and the central side wall portion 46A, respectively.

The elastic portion 72 of the present embodiment is provided so as to be arranged in the same region in the front-rear direction in the outer wall portion 46B and the central side wall portion 46A, and the pair of elastic portions 72 are provided in the electric wire wiring path 47. The covered electric wire 20 arranged inside is in contact with the same region in the front-rear direction from both sides.

The elastic portion 72 provided in the central side wall portion 46A is a small elastic portion 73 that protrudes into the electric wire installation portion 44 and then extends forward in a cantilever shape. On the other hand, the elastic portion 72 provided on the outer wall portion 46B is a large elastic portion 74 that protrudes into the electric wire installation portion 44 and then extends rearward in a cantilever shape.

As shown in FIGS. 3 and 6, the large elastic portion 74 has a protrusion amount L1 into the electric wire installation portion 44 larger than the protrusion amount L2 into the electric wire installation portion 44 of the small elastic portion 73, and is in the front-rear direction. It is formed to be long.

Further, the distance between the portion 74A where the large elastic portion 74 contacts the coated electric wire 20 and the portion 73A where the small elastic portion 73 contacts the coated electric wire 20 is set to the same dimension as the outer diameter dimension of the coated electric wire 20. There is. Here, the same dimension means that the distance between the portion 74A where the large elastic portion 74 contacts the coated electric wire 20 and the portion 73A where the small elastic portion 73 contacts the coated electric wire 20 is the outer diameter dimension of the coated electric wire 20. It may be the same, and even if it is not the same, it includes the case where it can be recognized as substantially the same.

Therefore, when the coated electric wire 20 is arranged between the outer wall portion 46B and the central side wall portion 46A, the coated electric wire 20 protrudes toward the coated electric wire 20 side from the small elastic portion 73 as shown in FIG. It contacts along the elastic portion 74 and is bent toward the central side wall portion 46A side. As a result, the covered electric wire 20 is held and arranged from both sides in the left-right direction by the large elastic portion 74 and the small elastic portion 73 in a state of being bent toward the central side wall portion 46A. Further, the covered electric wire 20 is arranged in the electric wire installation portion 44 in a state where the covered electric wire 20 is in contact with the small elastic portion 73 and has a clearance CL between the covered electric wire 20 and the central side wall portion 46A.

This embodiment has the above-mentioned configuration, and subsequently, the operation and effect of the electric wire distribution unit 10 will be described.
For example, when the electric wire distribution unit is used for high current and high voltage, for example, when it is exposed to heat generated by the coated electric wire itself or heat transmitted from a contact portion with a connection portion T on the device side, the cross-sectional area is larger than that of the terminal. The length of a covered wire with a large size changes significantly in the axial direction due to thermal expansion or contraction. Therefore, the terminal connection portion connected to the covered electric wire is pushed and pulled in the front-rear direction, which is the axial direction of the coated electric wire, and stress is concentrated on the contact portion between the terminal connection portion and the device side connection portion. There is a concern that a defect may occur in the contact portion.

Therefore, the present inventors have found the configuration of the present embodiment as a result of diligent studies in order to solve the above-mentioned problems. That is, in this embodiment, as shown in FIGS. 1 and 2, a terminal that electrically connects the terminal connection portion 32 provided on the terminal of the coated electric wire 20 and the device side connection portion T provided on the device. In the base 40, a contact arrangement portion 50 in which the terminal connection portion 32 and the device side connection portion T are arranged in contact with each other, and an electric wire installation portion provided in series with the contact arrangement portion 50 and in which the covered electric wire 20 is arranged. The coated electric wire 20 is bent and held in a state where it is elastically displaceably arranged between the electric wire installation portion 44 and the coated electric wire 20 and has a clearance CL between the coated electric wire 20 and the electric wire installation portion 44. It is provided with a stress relaxation unit 70.

That is, when the coated electric wire 20 thermally expands due to heat generation or the like, the terminal block 40 of the present embodiment further bends from the portion where the coated electric wire 20 has already bent, as shown in FIGS. 7 and 8. The coated electric wire 20 enters the clearance CL formed between the coated electric wire 20 and the electric wire installation portion 44 due to the elastic displacement of the stress relaxation portion 70, and absorbs the extra length generated by the thermal expansion of the coated electric wire 20. can do. In addition, in FIGS. 7 and 8, in order to make it easy to understand the state in which the coated electric wire 20 is thermally expanded and the state in which the coated electric wire 20 is not thermally expanded, the state in which the coated electric wire 20 on the right side (upper side in the drawing) is not thermally expanded is shown. It shows a state in which the coated electric wire 20 on the left side (lower side in the drawing) is thermally expanded.

On the other hand, when the coated electric wire 20 is thermally shrunk due to cooling or the like, as shown in FIGS. 9 and 10, the stress relaxation portion 70 is elastically displaced, so that the clearance between the coated electric wire 20 and the electric wire installation portion 44 is reached. The coated electric wire 20 enters the CL, the bent coated electric wire 20 becomes linear, and it is possible to suppress the application of tensile stress in the axial direction to the coated electric wire 20. In addition, in FIGS. 9 and 10, in order to make it easy to understand the state in which the coated electric wire 20 is heat-shrinked and the state in which the covered wire 20 is not heat-shrinked, the state in which the covered wire 20 on the right side (upper side in the drawing) is not heat-shrinked is shown. It shows a state in which the covered electric wire 20 on the left side (lower side in the drawing) is heat-shrinked.

That is, it is possible to suppress the application of stress to the contact portion between the terminal connection portion 32 and the device side connection portion T due to the thermal expansion or contraction of the coated electric wire 20. As a result, it is possible to prevent a defect from occurring in the contact portion between the terminal connection portion 32 and the device side connection portion T.

Further, the electric wire installation portion 44 has a plurality of side wall portions 46 arranged along the coated electric wire 20, and the stress relaxation portion 70 has a direction in which the plurality of side wall portions 46 intersect with the axial direction of the coated electric wire 20. It is provided so as to be elastically displaceable in the left-right direction, and has a plurality of elastic portions 72 that hold the coated electric wire 20 in a bent state so as to have a clearance CL between the coated electric wire 20 and the side wall portion 46.

By doing so, the coated electric wire 20 can be bent and held by the plurality of elastic portions 72 between the plurality of side wall portions 46. Then, when the coated electric wire 20 thermally expands, as shown in FIGS. 7 and 8, the elastic portion (small elastic portion 73) 72 is elastically displaced toward the side wall portion (central side wall portion 46A) 46 side. The coated electric wire 20 can be made to enter into the clearance CL formed between the coated electric wire 20 and the side wall portion (central side wall portion 46A) 46, and the extra length generated by the thermal expansion can be absorbed.

On the other hand, when the coated electric wire 20 is thermally shrunk, as shown in FIGS. 9 and 10, the elastic portion (large elastic portion 74) 72 is elastically displaced toward the side wall portion (outer wall portion 46B) 46 side. As a result, the coated electric wire 20 enters the clearance CL between the side wall portion (outer wall portion 46B) and the coated electric wire 20, and the bent coated electric wire 20 becomes linear, suppressing the application of tensile stress to the coated electric wire 20. can.
That is, when the coated electric wire 20 thermally expands or contracts, it is possible to suppress the generation of stress at the contact portion between the terminal connection portion 32 and the device side connection portion T.
Further, when the coated electric wire 20 is thermally shrunk to become linear, the coated electric wire 20 and the elastic portion (small elastic portion 73) are separated from each other in the left-right direction.

Further, the plurality of side wall portions 46 are composed of a pair of side wall portions 46 arranged on both sides of the coated electric wire 20 in the left-right direction, and the plurality of elastic portions 72 are covered as shown in FIGS. 1 to 6. It is composed of a pair of elastic portions 72 provided in the same region in the front-rear direction of the electric wire 20, and one of the pair of elastic portions 72 is a large elastic portion 74 that protrudes toward the coated electric wire 20 from the other. It is said that.

According to such a configuration, the covered electric wire 20 arranged between the pair of side wall portions 46 can be bent by the pair of elastic portions 72, so that the case where the elastic portions are configured to be three or more, for example, is compared with the case where the elastic portions are configured to be three or more. The configuration of the terminal block 40 can be simplified.

Further, according to the present embodiment, since the pair of elastic portions 72 are arranged in the same region in the front-rear direction, for example, the stress relaxation portion is compared with the case where the pair of elastic portions are arranged so as to be displaced in the front-rear direction. The 70 can be miniaturized in the front-rear direction. As a result, the terminal block 40 can be miniaturized in the front-rear direction.

By the way, when the pair of elastic portions 72 are arranged in the same region in the front-rear direction, there is a concern that the coated electric wire 20 cannot be bent when the pair of elastic portions 72 come into contact with the coated electric wire 20 from both sides. To. However, according to the present embodiment, one of the pair of elastic portions 72 is a large elastic portion 74 that protrudes toward the covered electric wire 20 from the other.

That is, since the protrusion amount L1 of the large elastic portion 74 from the outer wall portion 46B is set to be larger than the protrusion amount L2 of the small elastic portion 73 from the central side wall portion 46A, the large elastic portion 74 causes the protrusion amount L1. The coated electric wire 20 can be reliably bent toward the small elastic portion 73 side.

Further, the electric wire installation portion 44 has a bottom wall portion 45 on which the coated electric wire 20 is placed and a pair of side wall portions 46 extending from the bottom wall portion 45, and the pair of elastic portions 72 has side walls. It is formed so as to project cantilever from the portion 46 toward the covered electric wire 20.

According to such a configuration, since the pair of elastic portions 72 project from the side wall portion 46 toward the coated electric wire 20 in a cantilever manner, the protruding dimensions of the pair of elastic portions 72 from the side wall portions 46 can be adjusted. The ratio of bending the coated electric wire 20 can be easily adjusted.

Further, as shown in FIGS. 1 and 2, the electric wire distribution unit 10 accommodates a covered electric wire 20 drawn rearward from the electric wire installation portion 44 of the terminal block 40 on the opposite side of the contact arrangement portion 50. A portion 60 is provided, and the covered electric wire 20 housed in the enclosure 60 and the wall portion 62 of the enclosure 60 are arranged in close proximity to each other.

That is, the covered electric wire 20 housed in the surrounding portion 60 is surrounded by the wall portion 62, and each wall portion 62 and the coated electric wire 20 are in a close state. Therefore, when the coated electric wire 20 is thermally expanded, the coated electric wire 20 housed in the surrounding portion 60 cannot be bent, and the amount of thermal expansion of the coated electric wire 20 is the position of the electric wire installation portion 44 of the terminal block 40. Will be cumulatively extended to. That is, when the wall portion 62 of the surrounding portion 60 accommodating the coated electric wire 20 and the coated electric wire 20 are in close proximity to each other, the technique by which the stress relaxation portion 70 absorbs the extra length of the thermally expanded coated electric wire 20 is very difficult. It is effective for.

<Embodiment 2>
Next, the second embodiment will be described with reference to FIGS. 11 to 14.
The stress relaxation portion 170 of the terminal block 140 in the electric wire distribution unit 110 of the second embodiment is a modification of the shape of the pair of elastic portions 72 in the stress relaxation portion 70 of the first embodiment, and is common to the first embodiment. Since the composition, action, and effect are duplicated, the description thereof will be omitted. Further, the same reference numerals are used for the same configurations as those in the first embodiment.

As shown in FIGS. 11 to 14, the pair of elastic portions 172 of the second embodiment project from the central side wall portion 46A and the outer wall portion 46B toward the inside of the electric wire installation portion 44, and then intersect with the bottom wall portion 45. It is formed in a cantilever shape extending downward in the direction.

Of the pair of elastic portions 172, the elastic portion 172 provided on the outer wall portion 46B has a wire installation portion 44 rather than the protrusion amount L3 of the elastic portion 172 provided on the central side wall portion 46A , as shown in FIG. The large elastic portion 174 having a large inward protrusion amount L4 is used, and the elastic portion 72 provided on the central side wall portion 46A is a small elastic portion 173.

The large elastic portion 174 and the small elastic portion 173 are arranged side by side in the left-right direction, and come into contact with the same region in the front-rear direction of the covered electric wire 20 arranged between the outer wall portion 46B and the central side wall portion 46A. It is designed to do. Further, the distance between the large elastic portion 174 and the small elastic portion 173 is set to be substantially the same as the outer diameter dimension of the coated electric wire 20.

Therefore, the coated electric wire 20 arranged between the outer wall portion 46B and the central side wall portion 46A is directed toward the central side wall portion 46A side by the large elastic portion 174 protruding toward the coated electric wire side from the small elastic portion 173. Be bent. As a result, the covered electric wire 20 is held and arranged from both sides in the left-right direction by the large elastic portion 174 and the small elastic portion 173 in a state of being bent toward the central side wall portion 46A. Further, the covered electric wire 20 is arranged in the electric wire installation portion 44 with a clearance CL between the covered electric wire 20 and the central side wall portion 46A by coming into contact with the small elastic portion 173.

That is, the pair of elastic portions 172 of the present embodiment can have a smaller length dimension in the front-rear direction than, for example, an elastic portion extending cantilever in the front-rear direction, which is the axial direction of the covered electric wire. As a result, the stress relaxation unit 170 and eventually the terminal block 140 can be miniaturized in the front-rear direction.

<Embodiment 3>
Next, the third embodiment will be described with reference to FIGS. 15 to 19.
The terminal block 182 in the electric wire distribution unit 180 of the third embodiment is modified to include the contact arrangement portion 184 instead of the contact arrangement portion 50 of the terminal block 40 of the first embodiment. Since the configurations, actions, and effects common to those of the first embodiment are duplicated, the description thereof will be omitted. Further, the same reference numerals are used for the same configurations as those in the first embodiment.

The contact arrangement portion 184 has a bottom plate 185 having a substantially rectangular shape in a plan view, which is smaller than the mounting plate 41, and the bottom plate 185 projects in front of the mounting plate 41. A side wall portion 46 of the electric wire installation portion 44 extends from the contact arrangement portion 184 and is connected to both side surfaces of the bottom plate 185. A vertical wall portion 186 to which the side wall portion 46 is connected is provided at the front end portion of the bottom plate 185, and the tip portion of the terminal connection portion 32 is surrounded by the vertical wall portion 186.

A guide surface 188 that tilts downward toward the terminal accommodating area 190, which will be described later, is provided at the upper end portion of the vertical wall portion 186. The guide surface 188 is a flat surface having a constant inclination angle, but may be, for example, a curved surface, or the inclination angle may be changed stepwise. In the present embodiment, the periphery of the terminal 30 is surrounded by the central side wall portion 46A, the outer wall portion 46B, and the vertical wall portion 186 in the contact arrangement portion 184, and accommodates the terminal 30 continuously with the electric wire wiring path 47. The terminal accommodating area 190 is provided in the contact arrangement portion 184.
In this embodiment, as compared with the above-described embodiment, the flat plate-shaped terminal connection portion 32 provided on the terminal 30 extends longer in the front-rear direction, which is the axial direction of the coated electric wire 20, and is front-back in a plan view. It has a long rectangular shape in the direction.

The contact arrangement portion 184 is provided with a plurality of pressing portions 192. These pressing portions 192 are provided at positions separated from the vertical wall portion 186 toward the electric wire installation portion 44 in the front-rear direction. Each presser portion 192 includes a leg portion 194 extending upward from the bottom plate 185 of the contact arrangement portion 184, and a positioning portion 196 integrally formed at the tip end portion of the leg portion 194.

As shown in FIGS. 17 and 18, the leg portion 194 has a flat plate shape extending parallel to the side surface of the terminal connection portion 32. The leg portion 194 is formed of metal, synthetic resin, or the like, and is integrally formed with the contact arrangement portion 184 in the present embodiment. The leg portion 194 is capable of elastic bending deformation in the thickness direction.

As shown in FIG. 18, the positioning portion 196 is provided at the protruding tip portion of the leg portion 194 so as to project in the thickness direction of the leg portion 194. The upper surface of the positioning portion 196 is a pressing guide surface 198 composed of an inclined surface that inclines downward toward the protruding tip. When a downward force acts on the pressing guide surface 198, the leg portion 194 bends and deforms due to the component force, and the positioning portion 196 moves outward in the width direction.

The pressing portion 192 having such a shape is provided so as to face each other in a pair on both sides in the width direction of the terminal connecting portion 32 inserted between the side wall portions 46A and 46B. In the present embodiment, a pair of pressing portions 192 arranged to face each other on both sides in the width direction of the terminal connecting portion 32 are provided at two locations separated by a predetermined distance in the longitudinal direction of the terminal connecting portion 32 in the front-rear direction. ing. Each of the positioning portions 196 of the pair of pressing portions 192 protrudes inward in the facing direction of the pressing portions 192.

An elastic pressing portion 200 is provided between the pair of pressing portions 192 provided in front of the terminal connecting portion 32 in the longitudinal direction and the pair of pressing portions 192 provided in the rear. The elastic pressing portion 200 has a plate shape, and is capable of elastic bending deformation in the thickness direction. As shown in FIG. 18, the elastic pressing portion 200 is integrally formed with the side wall portion 46, and the number of parts is reduced. The elastic pressing portion 200 extends inward in the left-right direction of the terminal accommodating region 190 from the central side wall portion 46A and the outer wall portions 46B and 46B, respectively. The tip portion of the elastic pressing portion 200 is located inside the positioning portion 196 of the pressing portion 192 in the left-right direction. The elastic pressing portion 200 is gradually tilted upward toward the tip. The elastic pressing portion 200 has a curved cross section in which the tip portion thereof is convex upward. The upper surface of the tip portion of the elastic pressing portion 200 is located below the lower surface of the positioning portion 196 of the pressing portion 192. The bottom plate 185 of the contact arrangement portion 184 is provided with a die-cutting hole for manufacturing at a portion located below the elastic pressing portion 200.

As shown in FIG. 16, the elastic pressing portion 200 is provided between the pressing portions 192 provided in the front and rear in the longitudinal direction of the terminal connecting portion 32, substantially in the center between them. That is, in the present embodiment, a pair of pressing portions 192 are provided at positions separated by the same distance on both front and rear sides of the elastic pressing portion 200, respectively.

In a state where the covered electric wire 20 and the terminal 30 are arranged in the electric wire wiring paths 47, 47 and the terminal accommodating area 190 of the terminal block 140, each terminal connection portion 32 is a pair provided in each terminal accommodating area 190. It is inserted between the facing surfaces of the legs 194 of the presser portion 192. The distance between the legs 194 located on both sides of the terminal connection portion 32 in the width direction is larger than the width dimension of the terminal connection portion 32. The distance between the positioning portions 196 provided in each pair of holding portions 192 is smaller than the width dimension of the terminal connecting portion 32. As a result, the positioning portion 196 is provided at a position overlapping the upper surface of the terminal connecting portion 32 at both side edges of the terminal connecting portion 32, and the positioning portion can be pulled out upward from the terminal accommodating area 190 of the terminal connecting portion 32. Prevented by 196.

The terminal connecting portion 32 is inserted between the facing surfaces of each pair of holding portions 192 from above, so that the terminal connecting portion 32 easily gets over the positioning portion 196 and is arranged between the pair of leg portions 194. That is, in the terminal connection portion 32, the lower corner portions of both side portions are pressed downward from above against the pressing guide surface 198 of the positioning portion 196. As a result, a component force acting outward in the width direction of the terminal connection portion 32 acts on the positioning portion 196, the leg portion 194 is elastically bent, and the positioning portion 196 moves outward in the width direction. Moving. Then, the terminal connecting portion 32 is inserted until it comes into contact with the elastic pressing portion 200 through the positioning portion 196 expanded by the bending deformation of the leg portion 194. When the terminal connection portion 32 is inserted below the positioning portion 196, the bending deformation of the leg portion 194 is released, so that the positioning portion 196 approaches each other in the width direction and both side edges of the terminal connection portion 32. It is placed above the part.

The terminal connection portion 32 is inserted into the terminal accommodating area 190 while being in contact with the pressing guide surface 198 of the positioning portion 196, and is accommodated in the terminal accommodating area 190 in a state of being guided to a predetermined position in the width direction. As a result, the terminal connection portion 32 is positioned at an appropriate position in the terminal accommodating area 190 in the width direction by a simple operation of inserting the terminal connection portion 32 between the positioning portions 196. Therefore, the terminal connection portion 32 can be easily arranged at an appropriate position in the terminal accommodating area 190.

Further, a guide surface 188 is provided on the vertical wall portion 186 that forms a part of the wall portion of the terminal accommodating area 190 in the contact arrangement portion 184. As a result, when the terminal connection portion 32 is arranged in the terminal accommodating area 190 and attached to the contact arrangement portion 184, the terminal connection portion 32 also moves downward while the tip end side of the terminal connection portion 32 is in contact with the guide surface 188. Is guided to an appropriate position in the terminal accommodating area 190. In particular, when the terminal connection portion 32 is inserted into the terminal accommodating area 190 from the tip side (lower side in FIG. 16), the tip end side of the terminal connection portion 32 can be easily inserted into the terminal accommodating area 190.

As shown in FIG. 19, the terminal connection portion 32 inserted between each pair of holding portions 192 has an upper surface, which is a front surface, overlapped with a positioning portion 196 at both end edges in the width direction, and is a back surface. The lower surface is in contact with the upper surface of the elastic pressing portion 200. The terminal connection portion 32 is urged toward the upper side on the positioning portion 196 side by the elasticity of the elastic pressing portion 200, and both side edge portions of the terminal connection portion 32 are in contact with the positioning portion 196. The terminal connection portion 32 is inserted between each pair of holding portions 192, and is not fixed by fastening the fastening bolt B and the nut N, which will be described later, between the positioning portion 196 and the elastic pressing portion 200 in a set state. It is being pinched.

In this way, in the set state before the fastening bolt B is screwed to the nut N and the terminal connecting portion 32 is fixed, the terminal connecting portion 32 is attached to the positioning portion 196 that abuts on the upper surface of both side edge portions and the lower surface thereof. It is sandwiched and supported by the elastic pressing portion 200 to be pressed. In the present embodiment, it is conceivable that a force in the twisting direction may be applied to the terminal connection portion 32 due to the bending and holding of the covered electric wire 20 in the stress relaxation portion 70. Further, a force in the twisting direction may be applied due to the bending of the covered electric wire 20. Even in such a case, since the terminal connection portion 32 is sandwiched and supported between the positioning portion 196 abutting on both side edges of the upper surface and the elastic pressing portion 200 pressed against the lower surface, the terminal is supported. The twisting direction of the connecting portion 32 is prevented, and the terminal connecting portion 32 is positioned and held in the terminal accommodating region 190 in a normal direction. The regular orientation of the terminal connection portion 32 means a direction in which the upper surface and the lower surface of the terminal connection portion 32 spread orthogonally to the vertical direction which is the fastening direction of the fastening bolt B and the nut N. Therefore, the inclination of the terminal connection portion 32 with respect to the fastening direction of the fastening bolt B and the nut N is prevented, the fastening work of the fastening bolt B to the nut N becomes easy, and the terminal connecting portion 32 is stabilized at the contact arrangement portion 50. Can be installed. Further, when the terminal connecting portion 32 is fastened by the fastening bolt B and the nut N, the stress acting on the fastening bolt B due to the torsional displacement of the terminal connecting portion 32 is reduced.

In particular, the elastic pressing portions 200 are also provided on both sides of the terminal connecting portion 32 in the width direction, and are pressed against the lower surface of the terminal connecting portion 32 at two locations in the width direction, so that the terminal connecting portion 32 is twisted. Directional displacement is more effectively prevented.

A pair of pressing portions 192 are provided at two locations on both sides, front and rear, with respect to the elastic pressing portion 200. Then, when the terminal connecting portion 32 is displaced in the twisting direction, the terminal connecting portion 32 is displaced in the twisting direction by the positioning portion 196 at two locations separated in the front-rear direction from the portion supported by the elastic pressing portion 200 on the lower surface. Be restricted. As a result, it is possible to prevent the terminal connection portion 32 from being displaced in the prying direction due to the action of the moment due to the contact of the terminal connection portion 32 with the positioning portion 196. In particular, since each pair of pressing portions 192 provided at two locations separated in the front-rear direction are arranged at the same distance on both sides in the front-rear direction with respect to the elastic pressing portion 200, the terminal connection portion 32 and the like. The moment due to the contact of the positioning portion 196 is more effectively offset.

The terminal connection portion 32 is separated upward from the nut N in the above-mentioned set state shown in FIG. As a result, an error in the relative vertical distance between the upper surface of the nut N and the lower surface of the positioning portion 196 is allowed, and the terminal connecting portion 32 can be stably inserted between the positioning portion 196 and the nut N. It is said that.

The terminal connection portion 32 set in the terminal accommodating area 190 is fixed to the contact arrangement portion 50 by fastening the end portion of the fastening bolt B to the nut N, as in the first and second embodiments. As shown in FIG. 18, when the fastening bolt B is fastened to the nut N, the terminal connecting portion 32 moves downward and is overlapped with the nut N in a contact state. As a result, in the state where the fastening bolt B is fastened to the nut N, the terminal connecting portion 32 is separated downward from the positioning portion 196, and a gap 202 is provided between the upper surface of the terminal connecting portion 32 and the lower surface of the positioning portion 196. It is formed. Although the device-side connection portion T is not shown in FIG. 18, the terminal connection portion 32 is the device-side connection portion T by fastening the fastening bolt B to the nut N, as in the first and second embodiments. Connected to in contact.

<Other embodiments>
The techniques disclosed herein are not limited to the embodiments described above and in the drawings, and include, for example, various embodiments such as:
(1) In the above embodiment, the stress relaxation portions 70 and 170 are configured by a plurality of elastic portions 72 and 172. However, the present invention is not limited to this, and the stress relaxation portions 70 and 170 may be configured by installing a separate rubber material between the electric wire installation portion and the covered electric wire, and may be configured between the electric wire installation portion and the coated electric wire. A metal clip or the like may be arranged and configured.

(2) In the above embodiment, the coated electric wire 20 is bent by a pair of elastic portions 72 and 172. However, the present invention is not limited to this, and if a space can be secured in the front-rear direction, three or more elastic portions may be configured.

(3) In the above embodiment, the elastic portions 72 and 172 are configured on the pair of side wall portions 46 extending upward from the bottom wall portion 45. However, the present invention is not limited to this, and an elastic portion may be formed on the bottom wall portion. (4) In the above embodiment, the pair of elastic portions 72 and 172 are arranged in the same region in the front-rear direction. However, the present invention is not limited to this, and if a space can be secured in the front-rear direction, the pair of elastic portions may be configured to be displaced in the front-rear direction.

(5) In the above embodiment, the pair of elastic portions 72 and 172 are cantilevered. However, the present invention is not limited to this, and the elastic portion may be configured to have a double-sided shape.

(6) In the third embodiment, a structure in which four presser portions 192 are provided in each terminal accommodating area 190 is exemplified, but the number of presser portions 192 is not limited. The number of pressing portions 192 provided on both sides of the terminal connecting portion 32 in the width direction may be different from each other on the left side and the right side. Similarly, the number of elastic pressing portions 200 is not limited, and the numbers on the left and right may be different from each other.

(7) In the third embodiment, the positioning portion 196 may be overlapped on the surface at least at both left and right end portions of the terminal connection portion 32, and must be overlapped only at both left and right end portions in the left and right direction. There is no. Further, the positioning portion 196 is not limited to a structure provided independently on both sides of the terminal connecting portion 32 in the left-right direction. For example, a positioning portion extending across the terminal connection portion 32 in the width direction is adopted, and a mode in which the positioning portion is continuously overlapped with respect to the surface of the terminal connection portion 32 over the entire length in the width direction can be realized. .. In this case, for example, the positioning portion may be attached to and detached from the contact arrangement portion 50 so that the positioning portion can be attached to the contact arrangement portion 50 after the terminal connection portion 32 is set in the contact arrangement portion 50. .. Further, for example, the terminal connection portion 32 may be inserted and set in the front-rear direction between the positioning portion and the elastic pressing portion 200.

(8) In the third embodiment, the elastic pressing portion 200 is not necessarily limited to the one extending from the side wall portion 46, and may be integrally formed with, for example, the bottom wall portion 45 of the electric wire installation portion 44. Further, the elastic pressing portion may be configured by, for example, a separate coil spring supported by the bottom wall portion 45 of the electric wire installation portion 44.

(9) In the third embodiment, the presser portions 192 are provided on both the front and rear sides of the elastic pressing portion 200, respectively, but the presser portion 192 may be provided on only one of the front and rear sides with respect to the elastic pressing portion 200. .. Further, it is also possible to provide elastic pressing portions 200 on both front and rear sides of the pressing portion 192, and even in that case, it is possible to prevent the terminal connecting portion 32 from tilting in the twisting direction.

10, 110, 180: Electric wire distribution unit 20: Covered electric wire (an example of "electric wire")
22: Core wire 24: Insulation coating 30: Terminal 32: Terminal connection part (an example of "connection part")
34: Wire connection part 35: Barrel 40, 140, 182: Terminal stand 41: Mounting plate 42: Collar 44: Wire installation part 45: Bottom wall part 46: Side wall part 46A: Central side wall part 46B: Outer wall part 47: Wire Route 50, 184: Contact arrangement part 60: Surrounding part 61: Wire accommodating part 62: Wall part 70, 170: Stress relaxation part 72, 172: Elastic part 73, 173: Small elastic part 73A: Contacting the covered electric wire Part 74, 174: Large elastic part 74A: Part in contact with covered electric wire 185: Bottom plate 186: Vertical wall part 188: Guide surface 190: Terminal accommodating area 192: Pressing part 194: Leg part 196: Positioning part 198: Pressing guide surface 200: Elastic pressing part 202: Gap B: Fastening bolt CL: Clearance L1: Protrusion amount L2: Protrusion amount L3: Protrusion amount L4: Protrusion amount N: Nut T: Equipment side connection part (an example of "counterpart side connection part")

Claims (10)

It is a terminal block that electrically connects the connection part provided at the terminal of the electric wire and the connection part on the other side.
A contact arrangement portion in which the connection portion and the mating side connection portion are arranged in contact with each other,
An electric wire installation portion provided in series with the contact arrangement portion and on which the electric wire is arranged, and an electric wire installation portion.
A terminal provided with a stress relaxation portion which is arranged so as to be elastically displaceable between the electric wire installation portion and the electric wire and which bends and holds the electric wire with a clearance between the electric wire and the electric wire installation portion. Platform. The electric wire installation portion has a plurality of side wall portions arranged along the electric wire, and has a plurality of side wall portions.
The stress relaxation portion is provided so as to be elastically displaceable in a direction intersecting the axial direction of the electric wire in the plurality of side wall portions, and the electric wire is bent so as to have a clearance between the electric wire and the side wall portion. The terminal block according to claim 1, which has a plurality of elastic portions to be held in the terminal block. The plurality of side wall portions are a pair of side wall portions arranged on both sides of the electric wire.
The plurality of elastic portions are a pair of elastic portions provided in the same region in the axial direction of the electric wire.
The terminal block according to claim 2, wherein one of the pair of elastic portions is a large elastic portion that protrudes toward the electric wire more than the other. The electric wire installation portion has a bottom wall portion on which the electric wire is placed and the pair of side wall portions extending from the bottom wall portion.
The terminal block according to claim 3, wherein the pair of elastic portions project from the side wall portion toward the electric wire in a cantilever shape. The terminal block according to claim 4, wherein the pair of elastic portions are cantilevered in a direction intersecting the bottom wall portion. A positioning portion in which the connection portion has a flat plate shape and abuts on the surface of at least both side edges of the connection portion to position the connection portion in a normal direction.
The terminal block according to any one of claims 1 to 5, comprising an elastic pressing portion that abuts on the back surface of the connecting portion and urges the connecting portion. Legs that are arranged on both sides in the width direction of the connection portion and are elastically deformable are provided on the outside of the connection portion in the width direction.
The terminal block according to claim 6, wherein the positioning portion is formed on the leg portion so as to project. The terminal block according to claim 6 or 7, wherein the elastic pressing portion is integrally formed with the contact arrangement portion. The terminal block according to any one of claims 6 to 8, wherein the positioning portion is provided on both sides of the connection portion in the length direction with respect to the elastic pressing portion. The terminal block according to any one of claims 1 to 9.
An electric wire distribution unit including a surrounding portion for accommodating the electric wire drawn out from the electric wire installation portion of the terminal block to the side opposite to the contact arrangement portion.
An electric wire distribution unit in which the electric wire housed in the surrounding portion and the wall portion of the surrounding portion are arranged in close proximity to each other.

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