JP2016072009A - Shield connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce temperature rise in the housing, without increasing the size of a terminal fitting.SOLUTION: A shield connector 10 includes a male terminal 20, a synthetic resin housing 30 for housing the male terminal 20, a nut N fixed to a fixing part 38 provided in the housing 30, and transmitting heat of the male terminal 20 to the fixing part 38 by fastening the male terminal 20, and a metal shield shell 50 arranged on he outer surface of the fixing part 38 so as to eliminate an air layer produced between the fixing part 38 and the shield shell 50.SELECTED DRAWING: Figure 2

Description

  The technique disclosed by this specification is related with a shield connector.

  Conventionally, JP, 2014-107043, A (patent documents 1 below) is known as a shield connector in which the housing which stores a terminal metal fitting inside was covered with the shield body. The terminal fitting can be connected to the other terminal, and the terminal fitting is held in the housing by the engagement of the locking projection of the terminal accommodating chamber provided in the housing and the terminal fitting.

JP 2014-107043 A

  By the way, when a large current flows through the terminal fitting, heat generated in the terminal fitting becomes large, and the temperature in the housing rises. As a means for suppressing the temperature rise in the housing, a method of increasing the cross-sectional area of the terminal fitting and suppressing heat generation in the terminal fitting may be considered. However, in order to increase the cross-sectional area of the terminal fitting, it is necessary to increase the size of the terminal fitting. When the terminal fitting is enlarged, the manufacturing cost increases and the size of the connector also increases.

  The present specification discloses a technique for reducing the temperature rise in the housing without increasing the size of the terminal fitting.

The technology disclosed in this specification is a shield connector, which is fixed to a terminal, a synthetic resin housing that houses the terminal therein, and a fixing portion provided in the housing, and contacts the terminal. It has a feature in that it includes a heat transfer body and a metal shield shell disposed along the outer surface of the fixed portion so as to eliminate an air layer generated between the fixed portion and the heat transfer body.
According to the shield connector having such a configuration, heat generated in the terminal is quickly transmitted to the fixed portion through the heat transfer body, and the heat transmitted to the fixed portion can be radiated outward from the shield shell. Thereby, the temperature rise in the housing can be reduced without enlarging the terminals to suppress heat generation.

As an aspect of the technology disclosed by this specification, the following configurations are preferable.
The heat transfer body may be configured to be embedded in the fixed portion.
According to such a configuration, since the fixing portion is in close contact with the outer peripheral surface of the heat transfer body, the heat of the terminal can be efficiently transferred to the fixing portion through the heat transfer body.

The heat transfer body may be a nut made of a metal capable of tightening a screw portion provided on the terminal and having a high thermal conductivity.
According to such a configuration, the heat of the terminal can be quickly transferred from the nut covering the outer peripheral surface of the screw portion to the fixed portion.

A thickness of the fixed portion disposed between the heat transfer body and the shield shell may be set uniformly. Here, the term “uniform” does not need to be completely uniform, but also includes substantially uniform.
According to such a configuration, the heat transfer from the heat transfer body to the shield shell can be made uniform, and the heat dissipation from the heat transfer body can be improved.

  According to the technology disclosed in this specification, it is possible to reduce the temperature rise in the housing without increasing the size of the terminal fitting.

Cross section of shield connector Sectional drawing equivalent to the cross section of the AA line of FIG.

<Embodiment>
An embodiment will be described with reference to FIGS. 1 and 2.
This embodiment has illustrated the shield connector 10 with which the attachment hole C1 provided in case C of the apparatus mounted in a vehicle is mounted | worn. In the following description, the vertical direction is based on the vertical direction in FIG. Further, the front-rear direction is described with the left side in FIG. 1 as the front and the right side in the drawing as the rear.

  As shown in FIGS. 1 and 2, the shield connector 10 includes a male terminal (an example of a “terminal”) 20 that can be connected to a female terminal (not shown) of a device-side connector provided in a case C of the device, A synthetic resin housing 30 that houses the male terminal 20, a relay terminal 40 that is connected to the male terminal 20 in the housing 30 in a state of being connected to the terminal of the electric wire W, and a metal shield shell 50 that covers the housing 30. And is configured.

The male terminal 20 is made of a metal having excellent conductivity, and has a substantially cylindrical shape that is long in the front-rear direction. The front side portion of the male terminal 20 from the substantially central portion in the front-rear direction is a columnar connection portion 21 connected to the female terminal of the device-side connector, and a synthetic resin having a substantially columnar shape is formed at the front end of the columnar connection portion 21. A protective cap 22 made of metal is attached.
The rear end portion of the male terminal 20 is a male screw portion 23 having a thread formed on the outer peripheral surface, and a nut (an example of “heat transfer body”) N embedded in the male screw portion 23 in a housing 30 described later. The male terminal 20 is fixed in the housing 30 by being tightened into the housing 30.

  Between the cylindrical connecting portion 21 and the male screw portion 23, a flange portion 24 is provided that projects in a circular shape in the radial direction. On the front surface of the flange portion 24, a square tool assembly portion 25 for assembling a tool when the male screw portion 23 is fastened to the nut N of the housing 30 is provided.

As shown in FIG. 1, the housing 30 has a substantially L shape, and an electric wire introduction for introducing the electric wire W from below together with the fitting portion 31 fitted in the mounting hole C <b> 1 of the case C and the relay terminal 40. It is comprised including the part 32 and the connection part 33 which connects the fitting part 31 and the electric wire introduction part 32 in substantially L shape.
As shown in FIGS. 1 and 2, the fitting portion 31 is formed in a substantially cylindrical shape that is slightly wider in the lateral direction, and has a shape that opens forward. A fitting portion seal ring 34 is fitted to the outer peripheral surface of the fitting portion 31. When the fitting portion 31 is fitted into the mounting hole C1 of the case C, the fitting portion seal ring 34 extends over the entire circumference between the inner peripheral surface of the mounting hole C1 and the outer peripheral surface of the fitting portion 31. In contact with each other to prevent water and the like from entering the case C from the mounting hole C1.

  As shown in FIG. 1, the electric wire introduction part 32 has a shape that is slightly wider in the horizontal direction and longer in the vertical direction, and has a shape that opens downward. In the lower end portion of the electric wire introduction portion 32, a rubber plug 36 that is prevented from being detached by a rubber plug retainer 35 is mounted. The rubber plug 36 is in close contact with the inner peripheral surface of the electric wire introduction portion 32 and the outer peripheral surface of the electric wire W introduced into the electric wire introduction portion 32, so that the lower end opening of the electric wire introduction portion 32 enters the electric wire introduction portion 32. Prevents intrusion of water.

  As shown in FIG. 1, the connecting portion 33 has a box shape that is inclined downward as the upper surface on the rear side from the substantially central portion in the front-rear direction is directed rearward. Further, the upper surface of the connecting portion 33 is disposed at a position lower than the upper surface 31 </ b> A of the fitting portion 31, and the rear surface of the connecting portion 33 is disposed slightly forward of the rear surface 32 </ b> A of the wire introducing portion 32. That is, the upper wall of the connecting portion 33 is formed thinner than the upper wall of the fitting portion 31 and the rear wall of the electric wire introducing portion 32.

In addition, a pair of substantially L-shaped cavities 37 extending from the front end opening of the fitting portion 31 to the lower end opening of the electric wire introduction portion 32 are provided in the housing 30 side by side in the width direction. .
Of the cavities 37, the cavities 37 provided from the fitting portion 31 to the connecting portion 33 are spaces that extend straight forward and backward. When the fitting portion 31 is fitted into the mounting hole C1 of the case C into the cavity 37 provided from the fitting portion 31 to the connecting portion 33, the device-side connector enters, and the device-side connector female The terminal and the cylindrical connecting portion 21 of the male terminal 20 are electrically connected.

As shown in FIGS. 1 and 2, the cavity 37 in the connecting portion 33 is formed from the front end portion of the connecting portion 33 to the substantially central portion in the front-rear direction of the connecting portion 33. A fixing portion 38 in which a nut N is embedded and fixed is provided behind the center. In addition, as a method of embedding the nut N in the fixing | fixed part 38, arbitrary methods, such as press injection and insert molding, can be used as needed.
The nut N is being fixed to the fixing | fixed part 38 in the state opened ahead. By tightening the male screw portion 23 of the male terminal 20 from the front end opening of the nut N, the male terminal 20 is held in a cavity 37 formed from the fitting portion 31 to the connecting portion 33. .

Among the cavities 37, the cavities 37 provided from the electric wire introduction part 32 to the coupling part 33 are spaces that extend straight up and down as shown in FIG. 1. 40 and the electric wire W are introduced from below in a form along the cavity 37.
The relay terminal 40 is formed by pressing a metal plate excellent in conductivity and is long in the vertical direction. The relay terminal 40 has a configuration in which an electric wire connecting portion 42 is continuously provided below a flat terminal fastening portion 41, and the electric wire connecting portion 42 is crimped to the core wire W <b> 1 exposed at the end of the electric wire W. Thus, the relay terminal 40 is connected to the upper end portion of the electric wire W that is the terminal of the electric wire W.

  The terminal fastening portion 41 is provided with a through hole 43 penetrating in the thickness direction in the front-rear direction. The through hole 43 is provided on the front surface of the nut N so as to be coaxial with the nut N of the connecting portion 33. The fastening portion 41 is disposed, and the male screw portion 23 of the male terminal 20 is inserted into the through hole 43 and fastened to the nut N, whereby the male terminal 20, the relay terminal 40, and the nut N are fixed integrally. And the electric wire W are electrically connected.

As shown in FIG. 1, the shield shell 50 is formed by pressing or drawing a metal plate material excellent in conductivity and heat conductivity, and includes an upper shell 51 that covers the outer surface of the connecting portion 33, and an electric wire introduction. The lower shell 52 that covers the outer surface of the portion 32 is assembled with each other.
As shown in FIGS. 1 and 2, the upper shell 51 is formed in a box shape that opens forward and downward, and completely covers the upper surface, the rear surface, and both sides in the width direction of the connecting portion 33. ing. A mounting piece 53 is provided at the front edge of the upper shell 51 so as to project outward. The shield connector 10 is fixed to the case C by fixing the mounting piece 53 to the case C with a fixing bolt (not shown). It has come to be.

  As shown in FIG. 1, the lower shell 52 is formed in a substantially cylindrical shape, and the electric wire introduction part 32 can be accommodated from the upper end opening of the lower shell 52 inside the lower shell 52. Further, the shield shell 50 is configured by fitting the upper end portion of the lower shell 52 into the lower end portion of the upper shell 51, and in the state where the shield shell 50 is configured, bolts are inserted into the upper shell 51 and the lower shell 52 from the rear. The shield shell 50 is fixed to the housing 30 by being fastened to the rear wall of the electric wire introduction portion 32.

  Now, the nut N into which the male screw portion 23 of the male terminal 20 is fastened is formed of a metal having high thermal conductivity, and is arranged between the nut N and the upper shell 51 in the fixing portion 38 of the connecting portion 33. The fixed portion 38 has a uniform wall thickness. Further, the upper shell 51 is disposed in the vicinity of the entire outer surface of the connecting portion 33. Here, the term “uniform” does not need to be completely uniform, but also includes substantially uniform.

Specifically, the nut N is made of metal such as copper, stainless steel, or iron having high thermal conductivity, and the heat generated in the male terminal 20 is generated by covering the outer peripheral surface of the male screw portion 23 of the male terminal 20. The nut N is quickly transmitted.
On the other hand, as shown in FIGS. 1 and 2, the thickness L1 of the fixing portion 38 disposed between the nut N and the upper shell 51 is equal to the thickness L2 of the fitting portion 31 and the thickness of the wire introducing portion 32. The upper shell 51 is fixed to the housing 30 in a state of leaning against the connecting portion 33 so as to eliminate an air layer generated between the inner surface 51A of the upper shell 51 and the outer surface of the connecting portion 33. Has been. That is, the distance between the nut N and the upper shell 51 is very short, and the heat of the nut N is easily transmitted to the upper shell 51 through the fixing portion 38.

  Further, when the upper shell 51 is assembled at a proper position with respect to the connecting portion 33, as shown in FIG. 1, the outer surface 51B of the upper shell 51, the upper surface 31A of the fitting portion 31 and the rear surface 32A of the wire introducing portion 32 are substantially The outer surface shape from the upper part to the rear part of the shield connector 10 is configured so as not to be uneven.

  The present embodiment is configured as described above. Next, the operation and effect of the shield connector 10 will be described.

  When the shield connector 10 is attached to the case C of the device, the fitting portion 31 is fitted into the mounting hole C1 of the case C. Then, the device side connector provided in the case C enters the cavity 37 of the fitting portion 31 and the connecting portion 33, and the female terminal of the device side connector and the columnar connection portion 21 of the male terminal 20 are electrically connected. Is done. Next, the shield connector 10 is fixed to the case C by fixing the attachment pieces 53 of the shield shell 50 to the case C with fixing bolts or the like.

  By the way, when a large current flows between the cylindrical connection part 21 and the female terminal of the male terminal 20, heat generated between the cylindrical connection part 21 and the female terminal becomes large, so that the generated heat is trapped in the housing. If it is left as it is, the housing 30 and the electric wire W may be affected by heat and cause trouble.

  However, according to the present embodiment, since the nut N to which the male screw portion 23 of the male terminal 20 is tightened is made of a metal having high thermal conductivity, heat from the male terminal 20 is quickly transmitted to the nut N. The heat transmitted to the nut N is transmitted to the fixing portion 38. In addition, among the fixing portions 38 in which the nuts N are embedded, the fixing portions 38 disposed between the nuts N and the upper shells 51 have a uniform and thin thickness. Therefore, the heat of the nut N is quickly transmitted to the upper shell 51 via the fixing portion 38, and the heat is transmitted uniformly from the entire outer surface of the nut N to the upper shell 51. It has become.

That is, the heat generated between the cylindrical connecting portion 21 and the female terminal is first quickly transmitted to the nut N having high thermal conductivity covering the outer peripheral surface of the male screw portion 23 of the male terminal 20, and the heat transferred to the nut N. However, it is quickly transmitted to the upper shell 51 through the fixing portion 38. Then, the heat transmitted to the upper shell 51 is radiated outward.
Thereby, the heat in the housing 30 can be efficiently radiated to the outside, and the housing 30 and the electric wires W can be prevented from being affected by the heat.

  In addition, according to the present embodiment, since the nut N is embedded in the fixing portion 38, the entire outer peripheral surface of the nut N is in close contact with the fixing portion 38. The heat from the male terminal 20 can be radiated more efficiently.

  As described above, according to the shield connector 10 of the present embodiment, the heat of the male terminal 20 can be quickly transmitted to the nut N by configuring the nut N for tightening the male terminal 20 with a metal having high thermal conductivity. it can. In addition, the thickness of the fixing portion 38 disposed between the nut N and the upper shell 51 is made uniform and thin, and the air shield between the fixing portion 38 and the upper shell 51 is eliminated so as to shield the connecting portion 33. Since the shell 50 is disposed, the heat transmitted to the nut N can be radiated from the shield shell 50 through the fixing portion 38. Thereby, the temperature rise in the housing 30 can be reduced without enlarging the male terminal 20 and suppressing heat generation.

Further, according to the present embodiment, the entire outer peripheral surface of the nut N is brought into close contact with the fixing portion 38 by embedding the nut N in the fixing portion 38, and heat transfer from the nut N to the fixing portion 38 is improved. The heat dissipation of the heat in the housing 30 can be further improved.
Furthermore, according to the present embodiment, the nut N that fixes the male terminal 20 also functions as a heat transfer body that transfers the heat of the male terminal 20 to the fixing portion 38. For example, the male terminal is separate from the nut that fixes the male terminal. Compared with the case where a heat transfer body that contacts 20 is separately provided, the number of parts can be reduced, and the structure in the housing 30 can be simplified.

<Other embodiments>
The technology disclosed in the present specification is not limited to the embodiments described with reference to the above description and drawings, and includes, for example, the following various aspects.
(1) In the above embodiment, the male screw portion 23 of the male terminal 20 is fastened to the nut N and heat is transmitted from the nut N to the shield shell 50 through the fixing portion 38. However, the present invention is not limited to this, and a heat transfer plate separate from the nut may be fixed to the fixing portion, and the male terminal may be brought into contact with the heat transfer plate.
(2) In the above embodiment, the male screw portion 23 of the male terminal 20 is fastened to the nut N, and the male terminal 20 is fixed to the nut N. However, the present invention is not limited to this, and a connection portion having a bolt insertion hole is provided in the male terminal, and a separate bolt is inserted into the bolt insertion hole and tightened into the nut, thereby bringing the male terminal into contact with the nut. Good.

(3) In the above embodiment, the nut N is embedded and fixed in the fixing portion 38. However, the present invention is not limited to this, and the nut may be fixed with a plurality of fixing pieces or the like, or the nut may be movable within the fixing portion.
(4) In the above embodiment, the upper shell 51 is arranged close to the entire outer surface of the connecting portion 33. However, the configuration is not limited to this, and the inner surface of the upper shell may be in contact with the outer surface of the connecting portion.
(5) In the said embodiment, the thickness of the connection part 33 distribute | arranged between the nut N and the upper shell 51 is made thinner than the thickness of the upper wall of the fitting part 31, and the rear wall of the electric wire introduction part 32. Configured. However, the present invention is not limited to this, and the thickness of the connecting portion 33 arranged between the nut N and the upper shell 51 is approximately the same as the thickness of the upper wall of the fitting portion 31 and the rear wall of the wire introduction portion. You may comprise.

(6) In the above embodiment, the shield shell 50 is configured by a plurality of members by assembling the upper shell 51 and the lower shell 52 together. However, the present invention is not limited to this, and the shield shell may be configured by a single member.
(7) In the said embodiment, the shield connector 10 fitted to the apparatus side connector provided in the case C of an apparatus was shown as an example. However, the present invention is not limited to this, and the technology disclosed in this specification may be applied to a shield connector that can be fitted to a connector fixed to the end of the wire harness.

10: Shield connector 20: Male terminal (terminal)
23: Male screw part 30: Housing 38: Fixing part 50: Shield shell N: Nut (heat transfer body)

Claims (4)

A terminal,
A housing made of synthetic resin for accommodating the terminal therein;
A heat transfer body fixed to a fixed portion provided in the housing and contacting the terminal;
A shield connector comprising: a metal shield shell disposed along an outer surface of the fixed portion so as to eliminate an air layer generated between the fixed portion and the fixed portion.   The shield connector according to claim 1, wherein the heat transfer body is embedded in the fixed portion.   The shield connector according to claim 1 or 2, wherein the heat transfer body is a nut made of a metal capable of tightening a male screw portion provided on the terminal and having a high thermal conductivity.   The shield connector according to any one of claims 1 to 3, wherein a thickness of the fixed portion disposed between the heat transfer body and the shield shell is set to be uniform.

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