JP3127825U - Cord drawer structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold a cord firmly against a tensile force applied from the outside with a simple structure and a large space unnecessary.
A cord holding member (20) having a cord drawing hole (21) through which a cord (15) is inserted is inserted into a cord drawing opening (19) formed in a case body (3). A cord holding hole 26 is formed in the distal end portion of the cord holding member 20. The cord holding hole 26 includes a diametrical through-hole that protrudes into the case body 3 and opens at the outer periphery substantially orthogonal to the cord lead-out hole 21 opened at the distal end surface. The provided cord holding cylinder part 24 is formed integrally.
[Selection] Figure 3

Description

  The present invention relates to a cord drawing structure provided in various electronic devices in which a cord such as a power cord and various cables is drawn from a case body such as a housing or a housing.

  In an electronic device or the like, generally, a cord lead opening is formed in a case body, and a tubular cord holding member such as a bush or a grommet in which a cord lead hole penetrating in the axial direction is formed in the cord lead opening is formed. A cord drawing structure is provided for drawing the cord inserted into the cord drawing hole from the inside of the case body to the outside. In an electronic device or the like, such a cord drawing structure reduces the load on the cord in the drawing hole and prevents the occurrence of disconnection or the like.

  In an electronic device or the like, when a tensile force is applied to the cord from the outside, there is a possibility that the tensile force is directly applied to a connecting portion such as a tip portion of the cord and a circuit portion to cause a disconnection or the like. Therefore, an electronic device or the like is provided with an appropriate cord holding structure that holds the cord and prevents it from acting on the connection portion such as the circuit portion even when a tensile force is applied.

  For example, in Patent Document 1, a pair of retaining rods are integrally formed inside a case body so as to face a cord drawing opening, and the cords entangled with these retaining rods are fitted into a cord bush assembled to the cord drawing opening. An inserted cord holding structure is disclosed. In such a cord holding structure, when a tensile force is applied to the cord from the outside, the cord is held by the retaining rod, whereby occurrence of disconnection or the like at the connection portion with the circuit portion or the like is prevented.

  Further, in Patent Document 2, a plurality of holes or incisions are formed in parallel, and provided with, for example, a cord fixing plate that is fixed to a case body. A cord holding structure that is pulled out of the case body is disclosed. Even in such a cord holding structure, when a tensile force is applied to the cord from the outside, the cord is held by the cord fixing plate, thereby preventing disconnection or the like at the connection portion with the circuit portion or the like.

  As a conventional cord holding structure, for example, a cord holding structure 100 shown in FIG. 5 is widely used as the simplest structure. The cord holding structure 100 is formed by combining a U-shaped opening 102U and a lower case 102B, which are formed to face each other, at the abutting portion between the upper case 101U and the lower case 101B of the case body 101, so that the entire cord drawing opening is circular. The unit 102 is configured. The cord holding structure 100 is formed in an overall cylindrical shape in which a cord lead-out hole 104 is provided in the cord lead-out opening 102 so as to be sandwiched between the upper case 101U and the lower case 101B, and the case is formed in the outer peripheral portion. A cord bush 103 having mounting flange portions 105A and 105B sandwiching the body 101 from inside and outside is assembled. The cord holding structure 100 is pulled out from the inside of the case body 101 through the cord bush 103 when the cord 106 is inserted into the cord drawing hole 104, and the cord bush 103 protects the cord drawing opening 102. It is done.

In the cord holding structure 100, a knot 107 having an outer diameter larger than the inner diameter of the cord lead-out hole 104 is formed in the cord 106 inserted into the cord bush 103 inside the case body 101. In the cord holding structure 100, when a tensile force is applied to the cord 106 from the outside, the knot 107 abuts against the end surface of the cord bush 103 so that the tensile force is not applied to the inside of the circuit board. Prevents the occurrence of disconnection etc. at the connection part.
Japanese Utility Model Publication No. 52-134692 Japanese Utility Model Publication No. 62-135488

  By the way, in the cord holding structure disclosed in Patent Document 1 described above, since the retaining rod is formed inside the case body so as to face the cord drawing opening, the mold of the case body becomes complicated and the cost increases. There was a problem. Further, in the cord holding structure, the cord is restricted in the case body by forming the retaining rod in the case body, and the retaining rod is formed to have a relatively large diameter in order to hold the cord firmly. As a result, the space efficiency of the case body is reduced.

  Even in the cord holding structure disclosed in Patent Document 2 described above, since the fixing portion of the cord fixing plate is provided inside the case body, there is a problem that the mold of the case body is complicated and the cost is increased. Further, in the cord holding structure, there is a problem that the cord routing is restricted in the case body by the fixing position of the cord fixing plate in the case body, and the space efficiency of the case body is reduced by the cord fixing plate.

  In the above-described cord holding structure 100, the mold structure can be simplified by eliminating the holding portion on the case body side. However, the large knot 107 formed in the cord 106 reduces the space efficiency of the case body and compares the structure. There is a problem that the work of making the knot 107 in the middle of the long cord 106 is troublesome.

  In electronic devices and the like, it is a major challenge to further reduce the weight and size while firmly holding the cord in the cord lead-out part of the case body, but it is difficult to solve such a problem with the conventional cord holding structure Met. Accordingly, the present invention has been proposed for the purpose of providing a cord drawing structure that has a simple structure and does not require a large space and that firmly holds the cord against a tensile force applied from the outside.

  The cord drawer structure according to the present invention that achieves the above-described object is a cord body in which a cord drawer opening is formed, and a cord drawer hole that penetrates in the axial direction is formed inside the cord drawer opening. A cord holding member for drawing out the cord inserted into the drawing hole from the inside of the case body to the outside; The cord lead-out structure protrudes into the case body in a state assembled to the cord lead-out opening at the inner-side tip portion of the cord holding member, and the outer peripheral portion so as to be substantially orthogonal to the cord lead-out hole opened in the tip surface. A cord holding cylinder portion provided with a cord holding hole formed of a diametrical through hole that is opened in the tube is integrally formed.

  In the cord drawing structure, the cord is penetrated from the outer peripheral portion to the distal end surface after passing through the cord holding hole by the cord holding cylinder portion protruding into the case body with the cord holding member assembled to the cord drawing opening. The case body is pulled out from the inside of the case body through a substantially cross-shaped path to be inserted into the cord drawing hole. Therefore, in the cord drawing structure, the cord is held and prevented from moving in the cord holding hole against an external tensile force applied to the cord. In the cord drawing structure, disconnection or the like is prevented by preventing the tensile force applied to the cord by the cord holding cylinder portion of the cord holding member from being applied to the connecting portion of the cord and the circuit board.

In the cord drawing structure, a cord drawing hole for inserting a cord made of a pair of individual cords is formed in the cord holding member, and a pair of cord holding holes for inserting each individual cord in the cord holding cylinder portion It is formed so as to penetrate in a direction perpendicular to the cord drawing hole. In the cord drawing structure, each cord is passed through the cord holding hole by the cord holding cylinder portion, then drawn from the outer peripheral portion to the tip surface, and is collectively inserted into the cord drawing hole. In the cord drawing structure, since the cord holding holes are formed on both sides of the cord drawing hole, an increase in the diameter of the cord holding cylinder portion is suppressed.

  According to the cord drawing structure according to the present invention configured as described above, the cord holding member assembled to the cord drawing opening formed in the case body has the cord holding hole for drawing and holding the cord through a substantially cross-shaped path. Since the cord holding cylinder portion is integrally formed, the cord drawn from the case body can be securely held with space efficiency, and the device can be downsized. According to the cord drawing structure, it is not necessary to change the shape on the case body side, so that the cost increase is suppressed, and the cord can be freely routed in the case body, so that the efficiency of assembly work and the like can be improved. .

  Hereinafter, an AC (Alternating Current) adapter 2 having a cord drawing structure 1 shown as an embodiment of the present invention will be described in detail with reference to the drawings. As is well known, the AC adapter 2 incorporates a circuit unit having a transformation function, a rectification function, a stabilized power supply function, or the like, converts AC power of a commercial power source into DC power of a predetermined voltage, and supplies the converted power to an electronic device or the like. Note that the present invention is not limited to such an AC adapter 2 and can be implemented in various electronic devices or the like having a configuration whose details will be described later.

  As shown in FIG. 1, the AC adapter 2 is configured by combining an upper half 4 and a lower half 5 to form a rectangular box-shaped case body 3. The AC adapter 2 houses a circuit unit 6 that performs a transformation function, a rectification function, a stabilized power supply function, or the like, although details are omitted in the case body 3. The AC adapter 2 assembles an AC inlet 8 provided with a jack 9 into an inlet assembly opening 7 formed on the first side surface 3A in the longitudinal direction of the case body 3, and details will be described later on the opposing second side surface portion 3B. A cord drawing structure 1 is provided.

  The AC adapter 2 is supplied with AC power when an output plug 11 of a power cord unit 10 is attached to and detached from a jack 9 of an AC inlet 8 and an input plug 12 of the power cord unit 10 is connected to a commercial power outlet 13. Is done. In the AC adapter 2, the AC inlet 8 is connected to the circuit unit 6 inside the case body 3, and the AC power supplied by the circuit unit 6 is converted into DC power having a predetermined voltage.

  The AC adapter 2 connects one end side of the DC cord unit 14 to the circuit unit 6 and holds the cord 15 by the cord drawing structure 1 as will be described in detail later, and the other end side of the DC cord unit 14 is connected to the case body 3. Pull out from the inside to the outside. The AC adapter 2 supplies DC power of a predetermined voltage to the electronic device or the like by connecting a power connector 16 attached to the tip of the cord 15 of the DC cord unit 14 to an electronic device or the like (not shown). In the AC adapter 2, the cord 15 of the DC cord unit 14 can be separated into a pair of individual cords 15A and 15B as shown in FIGS. Is possible.

Although not described in detail, the AC inlet 8 includes a substantially sealed case formed in a rectangular box shape by a synthetic resin material, and the case body with the jack arrangement surface provided with the jack 9 of the case facing outward is provided. 3 is assembled to the first side surface 3A in the longitudinal direction. Although not shown, the AC inlet 8 is provided with a plurality of connection terminals on the side surface facing the jack arrangement surface of the case, and is connected to the circuit unit 6 through these connection terminals. Note that the AC inlet 8 is not limited to the specification with the jack 9 but may have, for example, a specification in which a plug that directly plugs into the outlet 13 of a commercial power supply is provided or a cable with a plug is drawn out. Of course.

  The AC adapter 2 is formed in a rectangular box shape in which the upper half 4 and the lower half 5 are opened by a synthetic resin material so that the bottom surface and the ceiling are open, and the lower end edge 4A of the upper half 4 and the lower half 5 are opposed to each other. The case body 3 is configured by abutting and combining the upper edge portion 5A over the entire area. Of course, the upper half and the lower half of the case body are not limited to the above-described butted structure. For example, a convex edge portion that is abutted in a superimposed state is formed on the lower end edge portion and the upper end edge portion. It may be a structure or the like. Further, the case body may be constituted by a box-shaped case main body with the bottom surface portion or the ceiling portion opened, and a lid body that is combined by closing the open portion of the case main body.

  As shown in FIGS. 2 and 3, the case body 3 has a semicircular cord lead-out opening half portion 17 formed in the lower end edge portion 4 </ b> A of the upper half 4, and is opposed to the cord lead-out opening half portion 17. Then, a semicircular cord lead-out opening half 18 is cut out at the upper edge 5A of the lower half 5. In the case body 3, the cord drawing opening half portion 17 and the cord drawing opening half portion 18 cooperate with each other by combining the lower end edge portion 4 </ b> A of the upper half 4 and the upper end edge portion 5 </ b> A of the lower half 5. A circular cord lead-out opening 19 is formed in the outer periphery.

  In the AC adapter 2, the cord holding structure 1 is constituted by the above-described cord drawing opening 19 and the cord holding member 20 described later in detail for assembling the cord drawing opening 19, and the cord 15 of the DC cord unit 14 is held. The case body 3 is pulled out from the inside. The cord holding member 20 is formed of a member made of a synthetic resin material having a little elasticity and having a substantially cylindrical shape having an outer diameter substantially equal to the inner diameter of the cord lead-out opening 19 and formed integrally therewith. As shown in FIGS. 3 and 4, the cord holding member 20 is formed with a cord lead-out hole 21 having an inner diameter into which the cord 15 of the DC cord unit 14 is slightly inserted and inserted in the axial direction. .

  The cord holding member 20 is integrally formed with a disc-shaped first mounting flange portion 22 and a second mounting flange portion 23 that protrude from the outer peripheral portion and are somewhat thick. The cord holding member 20 is configured such that the first mounting flange portion 22 and the second mounting flange portion 23 are larger in diameter than the inner diameter of the cord lead-out opening portion 19, and has a facing interval substantially equal to the thickness of the case body 3. Formed. As will be described later, the cord holding member 20 has the first mounting flange portion 22 positioned on the inner side of the case body 3 and the second mounting flange portion 23 positioned on the outer side with respect to the case body 3, so that the cord drawing opening 19 is provided. Assemble. The cord holding member 20 is assembled to the cord drawing opening 19 with the first attachment flange portion 22 and the second attachment flange portion 23 sandwiching the case body 3 as shown in FIG. In the cord holding member 20, a portion protruding from the first attachment flange portion 22 constitutes a cord holding cylinder portion 24, and a portion protruding from the second attachment flange portion 23 constitutes a code guide cylinder portion 25.

  As shown in FIG. 4, the cord holding member 20 has one opening portion 21 </ b> A opened at the tip end surface 24 </ b> A of the cord holding cylinder portion 24 and the other opening portion 21 </ b> B opened at the tip end surface of the cord guide cylinder portion 25. A cord drawing hole 21 penetrating the inside is formed. As shown in the figure, the cord holding member 20 is formed with a pair of cord holding holes 26A and 26B penetrating the cord holding cylinder portion 24 with the cord drawing hole 21 interposed therebetween.

Each of the cord holding holes 26A and 26B is formed to have an inner diameter that allows the individual cords 15A and 15B separated by breaking the coating to the cord 15 of the DC cord unit 14 to be inserted in a slightly tight state. The cord holding holes 26A and 26B are parallel to each other, are located on both sides of the cord drawing hole 21 and penetrate through the outer periphery of the cord holding hole 24 in a direction perpendicular to the cord drawing hole 21. Consists of holes.

  In the cord holding member 20, the cord guide tube portion 25 is formed in a conical tube shape with a gradually decreasing diameter toward the tip side, and a plurality of reinforcing ribs 27 are integrally formed on the outer peripheral portion. The cord guide tube portion 25 is formed in a conical tube shape, so that the mechanical strength is large at the portion of the case body 3, and the cord guide tube portion 25 has flexibility toward the distal end side so that the cord 15 is freely bent. .

  In the AC adapter 2, the cord holding member 20 is assembled to the case body 3 configured by combining the upper half 4 and the lower half 5 to constitute the cord holding structure 1, and the cord 15 held on the cord holding member 20 is connected to the case body 3. Pull out from the inside to the outside. In the AC adapter 2, as shown in FIGS. 2 and 3, the cord 15 having the power connector 16 attached to one end is inserted into the cord drawing hole 21 from the cord guide tube portion 25 side with respect to the cord holding member 20. It is. In the AC adapter 2, the cord 15 is separated from the individual cords 15 </ b> A and 15 </ b> B by being pulled out from the distal end surface 24 </ b> A of the cord holding cylinder portion 24 and breaking the coating on the distal end side.

  In the AC adapter 2, the separated individual cords 15 </ b> A and 15 </ b> B are inserted into the cord holding holes 26 </ b> A and 26 </ b> B and pass through the cord holding cylinder portion 24 in a direction perpendicular to the cord drawing hole 21. In the AC adapter 2, the individual cords 15 </ b> A and 15 </ b> B are subjected to a process of stripping the core wires at the respective distal ends, although the details are omitted, and each core wire is connected to the circuit unit 6. In the AC adapter 2, the cord 15 is inserted into the cord lead-out hole 21 and the cord holding holes 26 </ b> A and 26 </ b> B formed in the cord holding member 20 in this manner, whereby a substantially cross-shaped path is formed in the cord holding cylinder portion 24. Therefore, it will be guided.

  In the AC adapter 2, the cord holding member 20 holding the cord 15 is assembled to the case body 3 with the cord guide tube portion 25 facing outside. In the AC adapter 2, the cord holding member 20, for example, sandwiches the opening edge of the cord drawing opening half body portion 18 of the lower half 5 between the first attachment flange portion 22 and the second attachment flange portion 23. Assembled. In the AC adapter 2, the upper half 4 is opposed to the lower half 5 with the lower end edge 4 </ b> A and the upper end edge 5 </ b> A facing each other with the cord drawing opening half 17 facing the cord drawing opening half 18. The case body 3 is configured by being combined so as to face each other.

  In the AC adapter 2, the cord drawing opening half 17 of the upper half 4 and the cord drawing opening half 18 of the lower half 5 jointly constitute a circular cord drawing opening 19 in the case body 3, and this cord The cord holding member 20 is assembled to the drawer opening 19. In the AC adapter 2, with the cord holding member 20 assembled to the case body 3 in the cord drawing opening portion 19, the cord guide tube portion 25 protrudes to the outside and the cord holding tube portion 24 protrudes to the inside. The cord 15 is pulled out from the inside to the outside.

  In the AC adapter 2, the cord 15 is guided in a substantially cross-shaped path by the cord guide tube portion 25 of the cord holding member 20 inside the case body 3 as described above. Therefore, in the AC adapter 2, the individual cords 15 </ b> A and 15 </ b> B inserted into the cord holding holes 26 orthogonal to the tensile force act as stoppers against the tensile force from the outside acting on the cord 15, Force is not applied to the connection of the circuit unit 6. In the AC adapter 2, the occurrence of disconnection or the like is reliably prevented at the soldered portion between the core wire of the cord 15 and the terminal pattern of the circuit unit 6.

  In the AC adapter 2, the cord holding member 20 is assembled to the case body 3 with the cord 15 assembled, but it is needless to say that the assembly process is not limited thereto. In the AC adapter 2, the cord 15 may be inserted into the cord holding hole 26 and drawn around the outer peripheral portion of the cord holding member 20 in the state where the cord holding member 20 is assembled to the case body 3. .

  In the above-described embodiment, a pair of cord holding holes 26A and 26B into which the individual cords 15A and 15B separated by breaking the coating with the cord drawing hole 21 sandwiched between the cord holding cylinder portion 24 are respectively inserted are cord holding members. However, it is a matter of course that one cord holding hole into which the cord 15 is inserted may be formed. In the above-described embodiment, the cord holding structure 1 applied to the AC adapter 2 is shown. However, the cord holding structure 1 can be applied to various electronic devices.

It is a figure explaining the whole structure of the AC adapter provided with the cord holding structure shown as embodiment of this invention. It is a principal part disassembled perspective view which shows the structure of the code | cord | chord holding structure. It is principal part sectional drawing which shows the structure of the code | cord | chord holding structure. The code | cord | chord holding member is shown, The figure (A) is a front view, The figure (B) is sectional drawing. It is principal part sectional drawing which shows the structure of the conventional cord holding structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cord holding structure 2 AC adapter 3 Case body 4 Upper half 5 Lower half 6 Circuit unit 7 Inlet assembly opening 8 AC inlet 9 Jack 10 Power cord unit 11 Output plug 12 Input plug 13 Commercial power outlet 14 DC cord unit 15 Cord Reference Signs List 16 Power Connector 17 Cord Drawer Open Half 18 Cord Draw Open Half 19 Cord Draw Open 20 Cord Holding Member 21 Cord Draw Hole 22 First Mounting Flange 23 Second Mounting Flange 24 Cord Holding Tube 25 Code Guide Tube part 26 Cord holding hole 27 Reinforcing rib

Claims (2)

A case body in which a cord drawing opening is formed;
A cord drawing hole that penetrates in the axial direction is formed inside, and is assembled to the cord drawing opening, and includes a cord holding member that draws the cord fitted into the cord drawing hole from the inside of the case body to the outside,
A cord holding member in which an inner side portion of the cord holding member protruding into the case body in a state assembled to the cord drawing opening portion penetrates an outer peripheral portion in a direction substantially orthogonal to the cord drawing hole opened in a front end surface. Configure the cord holding cylinder with holes,
In the cord holding cylinder portion, the cord is inserted into the cord holding hole and then drawn from the outer peripheral portion to the distal end surface, and is inserted into the cord drawing hole from the opening portion, thereby moving from the inside of the case body to the outside. Cord drawer structure characterized by being pulled out.   The cord holding member forms the cord lead-out hole into which the cord composed of a pair of individual cords is inserted, and a pair of parallel cords into which the individual cords are individually inserted and inserted into the cord holding cylinder portion. The cord drawing structure according to claim 1, wherein the cord holding hole is formed so as to penetrate in a direction orthogonal to the cord drawing hole.

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