JP2008198419A - Inlet device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inlet device capable of preventing flowing of excess current and capable of carrying out easily a fuse exchange work. <P>SOLUTION: The inlet device 1 is provided with an inlet main body 5 having a fuse housing part 8 and a power supply terminal 6 to connect electrically the power supply wire of a power supply cord. The fuse housing part 8 houses a fuse body 12 detachably and a glass tube fuse 10 of the fuse body 12 is electrically connected to the power supply terminal 6. The power supply terminal 6 has an elastic deformation part 69 to push out the fuse body 12 to the outside of the fuse housing part 8. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an inlet device that can prevent an overcurrent from flowing.

Conventionally, for example, an inlet main body having a pair of power supply terminals and a ground terminal, a conductive fixing member that covers the inlet main body and attaches the inlet main body to a housing of an electric device, and the conductive fixing member and the ground terminal are electrically connected. There is known an inlet device including a ferrite core connecting member connected to the wire (see, for example, Patent Document 1).
JP 2004-95302 A

  However, in the conventional inlet device, in order to prevent an overcurrent from flowing, it is necessary to provide a fuse on the electric circuit board of the electric device, and it is not easy to replace the fuse.

  This invention is made | formed in view of such a point, and it aims at providing the inlet apparatus which can prevent that an overcurrent flows. It is another object of the present invention to provide an inlet device that can prevent an overcurrent from flowing and can easily replace a fuse.

  The inlet device according to claim 1 is an inlet main body having a fuse housing portion, a power supply terminal to which a power line of a power cord is electrically connected, and a fuse housing portion that is detachably accommodated. And a fuse body connected to each other.

  The inlet device according to a second aspect is the inlet device according to the first aspect, wherein the power supply terminal has an elastic deformation portion that pushes the fuse body out of the fuse housing portion.

  The inlet device according to claim 3 is the inlet device according to claim 1, wherein the inlet main body has an engagement receiving portion, and the fuse body is connected to the engagement receiving portion when the fuse body is accommodated in the fuse accommodating portion. An engaging portion that engages, and an operating portion that is operated when releasing the engagement between the engaging portion and the engaging receiving portion, and the power terminal is operated when the operating portion is operated. When the engagement between the joint portion and the engagement receiving portion is released, the elastic deformation portion pushes the fuse body out of the fuse housing portion.

  The inlet device according to claim 4 is the inlet device according to claim 3, wherein the fuse body is configured by a fuse holder having an engaging portion and an operation portion, and a fuse held by the fuse holder. Is.

  According to the first aspect of the present invention, since the fuse body that is removably accommodated in the fuse accommodating portion of the inlet body and is electrically connected to the power supply terminal is provided, it is possible to prevent an overcurrent from flowing.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the power supply terminal has the elastically deforming portion that pushes the fuse body out of the fuse housing portion, so that the fuse can be easily replaced.

  According to the invention of claim 3, in addition to the effect of the invention of claim 1, the power supply terminal has a fuse when the operation part is operated and the engagement between the engagement part and the engagement receiving part is released. Since it has the elastic deformation part which pushes a body out of a fuse accommodating part, fuse replacement | exchange operation | work can be performed easily.

  According to the invention which concerns on Claim 4, a fuse body is comprised by the fuse holder and the fuse hold | maintained by this fuse holder, and a fuse can be appropriately hold | maintained by a fuse holder.

  An embodiment of an inlet device of the present invention will be described with reference to the drawings. In addition, the direction of the arrow shown in FIG. 1 is demonstrated as the front-back direction and the left-right direction.

  1 to 9, reference numeral 1 denotes an inlet device. The inlet device 1 is, for example, a three-pole type AC inlet with a fuse fixed to a housing 2 of an electric device such as a measuring instrument with a screw 3 as a fixing tool. It is.

  In the inlet device 1, an insulating inlet body 5, a pair of conductive power terminals 6 to which a power line of a power cord (not shown) is electrically connected, and a ground line of the power cord are electrically connected. And a conductive ground terminal 7.

  The fuse body 8 of the inlet body 5 accommodates a fuse body 12 in which a substantially cylindrical glass tube fuse 10, which is a pair of two fuses, held by an insulating fuse holder 11 is detachable. Glass tube fuses 10 are electrically connected to the intermediate portions of the respective power supply terminals 6 (see FIG. 7).

  The inlet body 5 includes a body member 21 and a rear cover member 22 attached to the body member 21 so as to cover the rear plate portion 23 of the body member 21.

  The main body member 21 has a fuse accommodating portion 8 that opens toward the front. A fuse body 12 is fitted and housed in the fuse housing portion 8 so that it can be inserted and removed. The fuse accommodating portion 8 has an opening portion 8a that opens forward, and a pair of left and right columnar space portions 8b that communicate with the opening portion 8a and form a substantially cylindrical shape corresponding to the glass tube fuse 10. The main body member 21 has a power cord insertion opening 25 in the lower portion that opens forward. A connector portion of the power cord is removably fitted and inserted into the power cord insertion opening 25.

  The body member 21 includes a pair of left and right pin insertion holes 26 that communicate with the power cord insertion opening 25 and open toward the rear, and one power source that communicates with the power cord insertion opening 25 and opens rearward. An earth pin insertion hole 27, a pair of left and right first holes 28 communicating with the opening portion 8a of the fuse accommodating portion 8 and opening rearward, and a columnar space portion 8b of the fuse accommodating portion 8 communicating with the rear and It has a pair of left and right second holes 29 that open upward. Further, a pair of left and right screw insertion holes 32 is formed in the flange 31 on the front outer periphery of the main body member 21, and when the inlet device 1 is fixed to the housing 2 of the electric device in the screw insertion hole 32. Screw 3 is inserted.

  As shown in FIGS. 7 and 8, the engagement receiving portion 35 faces downward on the lower surface of the upper plate portion 33 of the main body member 21 of the inlet main body 5 facing the opening portion 8 a of the fuse accommodating portion 8. It is formed in a protruding shape. The engagement receiving portion 35 is provided at a position corresponding to the collar portion 31 of the main body member 21. The engagement receiving portion 35 has a horizontal plane 36, a vertical planar engagement receiving surface 37 facing upward from the rear end of the horizontal plane 36, and an inclined surface 38 facing diagonally forward and upward from the front end of the horizontal plane 36. .

  On the other hand, the rear cover member 22 has a pair of left and right pin insertion holes 41 penetrating in the front-rear direction, and has one ground pin insertion notch 42 at the lower end. A hole 43 that opens forward and upward and communicates with the pin insertion hole 41 is formed in the upper portion of the rear cover member 22.

  Each power terminal 6 has four components, that is, for example, a pin member (H pin) 50, an elastically deformable first spring member (F spring) 51, and an elastically deformable second spring member (spring contact) 52. And a terminal member (F pin) 53.

  The pin member 50 is attached to the main body member 21 of the inlet main body 5 while being inserted into the pin insertion hole 26 and the first hole 28 of the main body member 21. The pin member 50 has a pin portion 54 positioned in the power cord insertion opening 25 of the main body member 21. The pin portion 54 is inserted into the connector portion of the power cord, and the power line of the power cord is electrically connected to the pin portion 54. The pin member 50 has a horizontal plate-like contact portion 55 located in the first hole portion 28 of the main body member 21.

  The terminal member 53 is attached to the rear cover member 22 of the inlet main body 5 while being inserted into the pin insertion hole 41 and the hole 43 of the rear cover member 22. The terminal member 53 has a horizontal plate-like terminal portion 56 protruding rearward from the rear surface of the inlet body 5, that is, the rear surface of the rear cover member 22, and the terminal portion 56 is an electric circuit board ( (Not shown) is electrically connected via a wire or the like. The terminal member 53 has a vertical plate-like contact portion 57 located in the hole 43 of the rear cover member 22.

  The first spring member 51 is attached to the convex attached portion 13 of the fuse holder 11 of the fuse body 12. The first spring member 51 has a plate-like fuse contact portion 61 that is inclined upward and in contact with the front lower surface of the glass tube fuse 10 at the front portion, and is in contact with the contact portion 55 of the pin member 50. A plate-like pin contact portion 62 that is inclined downward toward the rear and has a plate-like shape. A concave mounting portion 63 is formed at the front-rear direction intermediate portion of the first spring member 51, and the mounting portion 63 is fitted to the mounted portion 13 of the fuse holder 11.

  The second spring member 52 is attached to the rear cover member 22 of the inlet body 5 while being inserted into the hole 43 of the rear cover member 22. The second spring member 52 comes into contact with the rear surface of the glass tube fuse 10 on the side protruding from the fuse holder 11 and urges the glass tube fuse 10 forward to be inclined downward and plate-like. The fuse contact portion 66 is provided at the front portion, and the terminal contact portion 67 that contacts the contact portion 57 of the terminal member 53 is provided at the rear portion. The terminal contact portion 67 is fitted and inserted into the hole 43 of the rear cover member 22. The second spring member 52 constitutes an elastic deformation portion 69 that pushes at least part of the fuse body 12 out of the fuse housing portion 8 of the inlet body 5.

  The ground terminal 7 is constituted by a ground pin member (E pin) 70 which is one constituent member. The earth pin member 70 is attached to the inlet body 5 in a state of being inserted into the ground pin insertion hole 27 of the main body member 21 and the ground pin insertion notch 42 of the rear cover member 22. The earth pin member 70 has a ground pin portion 71 positioned in the power cord insertion opening 25 of the main body member 21. The earth pin portion 71 is inserted into the connector portion of the power cord, and the ground wire of the power cord is electrically connected to the ground pin portion 71. The ground pin member 70 has a horizontal plate-like ground terminal portion 72 that protrudes rearward from the rear surface of the inlet body 5, that is, the rear surface of the rear cover member 22, and the ground terminal portion 72 is a ground connection portion ( (Not shown) via a wire or the like.

  The fuse body 12 includes a single fuse holder 11 and a pair of left and right glass tube fuses 10 that are detachably held by the fuse holder 11.

  The fuse holder 11 has a holder main body part 81 having a substantially rectangular parallelepiped shape, and the holder main body part 81 has a pair of left and right holding holes that open toward the rear and have a substantially cylindrical shape corresponding to the glass tube fuse 10. 82 is formed. The front portion of the glass tube fuse 10 is removably fitted and inserted into the holding hole portion 82, and the glass tube fuse 10 is held by the holder main body portion 81.

  Further, on the upper surface side of the holder main body 81, a locking plate portion 84 which is an elastically deformable plate-like lock portion having a substantially rectangular shape in plan view is integrally provided. That is, for example, as shown in FIGS. 7 and 8, an upright portion 86 is integrally provided so as to protrude upward at the rear end portion of the upper plate portion 85 of the holder main body 81, and an upper end portion of the upright portion 86 is provided. The locking plate portion 84 protrudes integrally from the front. A space portion 87 is formed between the locking plate portion 84 and the upper plate portion 85 of the holder main body 81, which are opposed to each other in the vertical direction, to allow elastic deformation of the locking plate portion 84 downward. Yes.

  The locking plate portion 84 is a claw that detachably engages with the engagement receiving portion 35 of the inlet body 5 and maintains the fuse body 12 in the accommodated state when the entire fuse body 12 is accommodated in the fuse accommodating portion 8. The engaging portion 91 has a shape. The engaging portion 91 is formed on the upper surface of the locking plate portion 84 so as to protrude upward, and is positioned at the approximate center of the locking plate portion 84 in the front-rear direction. The engaging portion 91 is urged forward by the elastic deformation portion 69 of the power terminal 6 when the fuse body 12 is housed in the fuse housing portion 8, whereby the engagement receiving portion 35 of the inlet body 5. The engagement receiving surface 37 has an engagement surface 92 that comes into contact with and abuts on the surface. Further, the engaging portion 91 has an inclined surface 90 that extends obliquely rearward and downward from the upper end of the engaging surface 92. Further, the front end portion, which is the distal end portion of the locking plate portion 84, is an operation portion 93 that is pressed down when the engagement between the engagement portion 91 and the engagement receiving portion 35 is released. A plurality of step portions 94 are formed on the upper surface of the operation portion 93.

  Then, as shown in FIG. 7, when the fuse body 12 is housed in the fuse housing portion 8, the operation portion 93 of the lock plate portion 84 of the fuse holder 11 is pressed by the tip portion of the tool or the fingertip. Then, when the locking plate portion 84, which is an elastically deforming plate portion, is elastically deformed so that the front end side pivots downward with the rear end side as a fulcrum, as shown in FIG. The engagement between the engagement portion 91 and the engagement receiving portion 35 is released. As a result, the fuse body 12 is moved by the elastic deformation portion 69 of the pair of left and right power supply terminals 6, that is, the elastic restoring force of the second spring member 52. 8 is pushed out, and at least a part of the fuse body 12, for example, the front plate part 95 and the operation part 93 of the fuse holder 11 protrude from the fuse housing part 8 toward the front. For example, “FUSE INSIDE” is displayed on the front surface of the front plate portion 95 of the fuse holder 11.

  Next, the operation and the like of the one embodiment will be described.

  The inlet device 1 is fixed to the casing 2 of the electrical device by inserting the screw 3 into the collar portion 31 screw insertion hole 32 of the inlet main body 5 and screwing it into a desired portion of the casing 2 of the electrical device.

  When the connector part of the power cord is fitted and inserted into the power cord insertion opening 25 of the inlet body 5, the power line of the power cord is electrically connected to the pin part 54 of the pin member 50 of the power terminal 6, and the power source The ground wire of the cord is electrically connected to the ground pin portion 71 of the ground pin member 70 of the ground terminal 7. Then, an AC power supply signal is supplied to the pair of power supply terminals 6 when the electric device is turned on.

  When the glass tube fuse 10 is to be replaced, the lock plate 84 is moved downward by depressing the operation portion 93 of the fuse holder 11 of the fuse body 12 in the accommodated state, for example, with the tip or fingertip of a tool. When elastically deforming, the engagement between the engagement portion 91 and the engagement receiving portion 35 that are in contact with each other is released. That is, the engaging surface 92 of the engaging portion 91 of the locking plate portion 84 is separated from the engaging receiving surface 37 of the engaging receiving portion 35 of the inlet body 5 by the downward movement.

  When the engagement between the engagement portion 91 and the engagement receiving portion 35 is released, the fuse body 12 moves forward based on the elastic restoring force of the elastic deformation portion 69 of the pair of left and right power supply terminals 6, and the fuse housing portion. 8 is pushed out, for example, the front plate portion 95 and the operation portion 93 of the fuse holder 11 protrude from the fuse housing portion 8 toward the front (see FIG. 8).

  Next, after gripping a portion of the fuse holder 11 located outside the fuse housing portion 8 and taking out the entire fuse body 12 from the fuse housing portion 8, the glass tube fuse 10 is removed from the fuse holder 11, and a new glass tube fuse 10 is removed. Is attached to the fuse holder 11.

  Then, the fuse body 12 is fitted and inserted into the fuse accommodating portion 8 of the inlet body 5 and accommodated. By inserting the fuse body 12 into the fuse housing portion 8, the elastic deformation portion 69 of the power supply terminal 6 is pushed by the glass tube fuse 10 and elastically deformed.

  Further, when the fuse body 12 is inserted into the fuse accommodating portion 8, the inclined surface 90 of the engaging portion 91 is guided by the inclined surface 38 of the engaging receiving portion 35, so that the locking plate portion 84 of the fuse holder 11. Is pushed downward and elastically deforms once, and when the engaging portion 91 is separated from the horizontal surface 36 of the engaging receiving portion 35, the locking plate portion 84 of the fuse holder 11 is restored to its original shape by the elastic restoring force. As a result, the engagement surface 92 of the engagement portion 91 and the engagement reception surface 37 of the engagement receiving portion 35 are brought into contact with each other with a desired pressure contact force based on the elastic restoring force of the elastic deformation portion 69 of the power terminal 6. Match.

  And, according to such an inlet device 1, the fuse body 12 that is housed in the fuse housing portion 8 of the inlet body 5 so as to be able to be inserted and removed is electrically connected to the both power supply terminals 6. Therefore, it is possible to prevent an overcurrent from flowing through the electric circuit board without providing a fuse on the electric circuit board of the electric device.

  Further, when both the power supply terminals 6 are pressed down on the operation portion 93 of the fuse holder 11 and the engagement between the engagement portion 91 and the engagement receiving portion 35 is released, the fuse body 12 is moved forward to enter the inlet. Since it has the elastic deformation part 69 pushed out of the fuse accommodating part 8 of the body 5, the glass tube fuse 10 can be easily taken out from the fuse accommodating part 8 of the inlet body 5, and a fuse replacement | exchange operation | work can be performed easily.

  In the above embodiment, the fuse body 12 is constituted by the fuse holder 11 having the engaging portion 91 and the operation portion 93 and the two glass tube fuses 10 held by the fuse holder 11. However, for example, the fuse body may be composed only of the glass tube fuse 10, and only the glass tube fuse 10 that is the fuse body may be pushed out of the fuse housing portion 8 by the elastic deformation portion 69 of the power supply terminal 6.

  Further, the present invention is not limited to a three-pole type inlet, and can be applied to, for example, a two-pole type inlet.

It is a disassembled cross-sectional perspective view of the inlet apparatus which concerns on one embodiment of this invention. It is sectional drawing of an inlet apparatus same as the above. It is a disassembled perspective view of an inlet apparatus same as the above. It is a perspective view of an inlet device same as the above. It is a perspective view of an inlet device same as the above. It is a front view of an inlet apparatus same as the above. It is AA sectional drawing of FIG. It is AA sectional drawing of FIG. 6 which shows the engagement release state of an inlet apparatus same as the above. It is a perspective view which shows the state which attached the inlet apparatus same as the above to the housing | casing of an electrical equipment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inlet apparatus 5 Inlet main body 6 Power supply terminal 8 Fuse accommodating part
10 Fuse is a glass tube fuse
11 Fuse holder
12 Fuse body
35 Engagement receiver
69 Elastic deformation
91 Engagement part
93 Control section

Claims (4)

An inlet body having a fuse housing; and
A power supply terminal to which the power line of the power cord is electrically connected;
An inlet device comprising: a fuse body that is detachably accommodated in the fuse accommodating portion and is electrically connected to the power supply terminal. The inlet device according to claim 1, wherein the power supply terminal includes an elastic deformation portion that pushes the fuse body out of the fuse housing portion. The inlet body has an engagement receiving portion,
The fuse body is operated when the engagement portion engaged with the engagement receiving portion in the state of being accommodated in the fuse accommodating portion, and when the engagement between the engagement portion and the engagement receiving portion is released. And
The power supply terminal has an elastic deformation portion that pushes the fuse body out of the fuse housing portion when the operation portion is operated and the engagement between the engagement portion and the engagement receiving portion is released. The inlet device according to claim 1. The fuse body
A fuse holder having an engagement portion and an operation portion;
The inlet device according to claim 3, comprising: a fuse held by the fuse holder.

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