JP2014073000A - Prevention structure of wrong assembling of cover of electric connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a prevention structure of wrong assembling of a cover of an electric connection box, that requires no working for mounting the cover while visually inspecting a display part provided to the cover and that requires no detection structure of wrong assembling for a box body.SOLUTION: A prevention structure of wrong assembling of a cover of a relay box 11 includes: a first box body 17 attached to a vehicle; a plurality of circuit switch components 19 that are accommodated in the first box body 17, disposed according to arrangement patterns 33 dependent on the vehicle to configure an electric circuit; a first cover 15 that is mounted on the first box body 17 to cover the plurality of circuit switch components 19; and a parts detection projection 27 that is vertically provided on an inner surface of the first cover 15 and inserted in a third socket 37 in which no circuit switch component 19 is mounted in the arrangement patterns 33.

Description

  The present invention relates to a cover improper assembly prevention structure for an electrical junction box.

The electrical circuit of a vehicle varies depending on the vehicle type, engine, vehicle type, etc., but the relay box (electrical connection box) that distributes the power in this way also has the type and arrangement of fuses that protect the relays and electric wires that are circuit switch parts ( The arrangement pattern is different in the same outer shape relay box. As a countermeasure, each caution (display unit) is printed on the inner surface of a cover (upper lid) that protects the circuit switch component by engraving or printing.
Specifically, as shown in FIG. 6A, in order to attach the cover 501 corresponding to the vehicle to the box main body (not shown), the marking or the barcode 503 provided on the inner surface of the cover 501 is read. Therefore, measures are taken to prevent incorrect assembly other than the applicable box body.
In addition, as shown in FIG. 6 (b), by changing the number and position of the protrusions 505 provided on the cover 501, measures are taken so that they are read with a checker and not misassembled except for the applicable box body. Has been.

On the other hand, there is also known one that structurally provides a function for preventing erroneous coupling as a measure for preventing erroneous attachment of the cover to the box body regardless of reading the barcode 503 or the protrusion 505. For example, the electrical junction box disclosed in Patent Document 1 includes a lower case (box body) for housing electrical components and an upper case (cover) that is fitted to the lower case. And the unevenness | corrugation can be mutually fitted in the lower case or the upper case. These convex portions and concave portions are configured so as to correspond to each other by the fitting relationship of the concave and convex portions.
According to such an electric junction box, when the upper case is fitted to the lower case, it is possible to prevent the upper case other than the predetermined case from being mistakenly fitted to the lower case.

Japanese Patent Laid-Open No. 11-27827

However, as described above, in order to prevent the erroneous assembly by attaching the cover 501 corresponding to the vehicle to the box body, a measure is applied to the cover 501 for marking, barcode 503, and protrusion 505 for mechanical identification. Even if the assembling work is performed, finally, a complicated confirmation work for ensuring quality in terms of quality management occurs.
In addition, since the cover 501 protects the electric circuit, circuit switch components, and the like, after fixing the wire harness to the vehicle, the vehicle manufacturer worker attaches it to the box body while visually checking the display unit 507. There is a current situation.
In addition, as in the electrical junction box disclosed in the above-mentioned Patent Document 1, in order to prevent erroneous assembly due to the concave / convex fitting relationship provided on the box body and the cover, an erroneous assembly detection structure is formed on the box body. This is disadvantageous for reducing the size of the relay box. Therefore, there is a demand for a measure that can reliably prevent erroneous assembly while reducing erroneous assembly confirmation work and that does not require a space for detecting erroneous assembly in the box body.

  The present invention has been made in view of the above situation, and the purpose thereof is to prevent the work of attaching the cover while visually confirming the display portion provided on the cover, and to the box body, an erroneous assembly detection structure. It is an object of the present invention to provide a structure for preventing erroneous assembly of a cover of an electrical junction box that does not need to be provided.

The above object of the present invention is achieved by the following configuration.
(1) A box body attached to a vehicle, a plurality of circuit switch parts housed in the box body and arranged in an arrangement pattern corresponding to the vehicle to constitute an electric circuit, and the plurality of circuit switch parts mounted on the box body. A cover that covers the circuit switch component, and a component presence / absence detection protrusion that is suspended from the inner surface of the cover and is inserted into a component mounting space in which the circuit switch component is not mounted in the arrangement pattern. A structure for preventing incorrect assembly of electrical junction box covers.

According to the structure for preventing erroneous assembly of the electrical connection box cover of the configuration (1) above, a plurality of circuit switch parts are mounted on the box body attached to the vehicle in a predetermined arrangement pattern according to the vehicle. It is arranged corresponding to the space. In a plurality of component mounting spaces secured in the box body, there are a case where a circuit switch component is mounted and a case where a circuit switch component is not mounted depending on an arrangement pattern. That is, the arrangement pattern of the circuit switch parts is in accordance with the vehicle type, engine, vehicle type, etc. of the vehicle. In order to protect these circuit switch parts, a cover attached to the box body is provided with a display portion on which the names of auxiliary devices and the respective cautions that match the arrangement pattern are printed. Therefore, a specific cover corresponding to the box body must be attached to the box body attached to the vehicle.
Therefore, a component presence / absence detection protrusion is inserted on the inner surface of the cover so as to be inserted into a component mounting space in which no circuit switch component is mounted in the arrangement pattern. The component presence / absence detection protrusion is inserted into a component mounting space in which no circuit switch component is mounted, and allows the cover to be mounted only when a regular cover is mounted on the box body. On the other hand, if the box main body and the cover do not match, the component presence / absence detection protrusion interferes with the circuit switch component mounted in the component mounting space, thereby making it impossible to mount the cover. It is detected that the cover is not a proper one corresponding to the box body for the vehicle by the state where the cover cannot be attached. As a result, only a regular cover is attached to the box body mounted on the vehicle, and a cover suitable for the power supply circuit of the vehicle is definitely attached.

(2) The structure for preventing erroneous assembly of a cover of the electrical junction box having the configuration of (1), wherein the component presence / absence detection protrusion is mounted in the component mounting space when the cover is mounted. A structure for preventing erroneous assembly of a cover of an electrical junction box, comprising a buffer portion that can be elastically deformed by a reaction force from the electrical connection box.

  According to the structure for preventing erroneous assembly of the cover of the electrical junction box having the configuration of (2) above, when the wrong part is detected and the cover part presence / absence detection protrusion hits the circuit switch part, the circuit switch The buffer portion of the component presence / absence detection protrusion is elastically deformed by the reaction force from the component, and the reaction force is absorbed, thereby preventing an excessive load from acting on the circuit switch component.

(3) A cover misassembly prevention structure of the electrical junction box having the configuration of (1) or (2) above, wherein a display unit indicating an accessory name corresponding to the vehicle is a mold for molding the cover. A structure for preventing erroneous assembly of a cover of an electrical junction box, characterized in that it is formed by an insert piece to be assembled, and the insert piece is provided with a protrusion forming portion for forming the component presence / absence detection protrusion.

  According to the cover improper assembly prevention structure of the electrical junction box having the configuration of (3) above, the display portion of the cover and the component presence / absence detection protrusion are simultaneously formed by the same insertion piece. As a result, it is easy to manufacture a cover with different projecting positions of the component presence / absence detection projections for each type, and the component presence / absence detection projections at wrong positions are not formed on the cover.

  According to the structure for preventing erroneous assembly of the cover of the electrical junction box according to the present invention, there is no work for attaching the cover while visually confirming the display portion provided on the cover, and the erroneous detection of the assembly is performed on the box body. There is no need to provide a structure.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

It is a perspective view of the state where the cover of the relay box provided with the cover incorrect assembly prevention structure concerning one embodiment of the present invention was removed. (A) is a perspective view of a box body in which a plurality of circuit switch parts are accommodated in a predetermined arrangement pattern, and (b) is a relay box showing a state in which a regular cover corresponding to the box body of (a) is mounted. It is the principal part expansion perspective view which notched a part. (A) is a perspective view of a box body in which a plurality of circuit switch parts are housed in an arrangement pattern different from FIG. 2, and (b) is a relay showing a state in which a regular cover corresponding to the box body of (a) is mounted. It is the principal part expansion perspective view which notched a part of box. It is the perspective view which notched a part of relay box which shows the state which tried to mount | wear with an incorrect cover to a box main body. (A) is a longitudinal cross-sectional view of a component presence / absence detection protrusion, and (b) is a longitudinal cross-sectional view showing a modification of the component presence / absence detection protrusion. (A) is a rear view of the conventional cover provided with the display part and the barcode, and (b) is a plan view of the conventional cover provided with a projection for reading.

Embodiments according to the present invention will be described below with reference to the drawings.
The cover misassembly prevention structure according to the present embodiment includes a first and second cover 15 that is attached to the opening 13 of the first and second box bodies 17 and 17A constituting the relay box 11 that is an electrical connection box. The case where it is used for a 15A misassembly prevention structure is demonstrated to an example.
As shown in FIG. 1, a first box body 17 which is a box body attached to a vehicle (not shown) accommodates and arranges a plurality of circuit switch parts 19 such as relays and fuses, corresponding to the vehicle. An electric circuit is formed.

  In the first box body 17, circuit switch components 19 such as relays and fuses are arranged in a predetermined arrangement pattern in order to form this predetermined electric circuit. That is, the circuit switch component 19 housed in the first box body 17 mounted on the vehicle has an arrangement pattern corresponding to the vehicle.

  The first box body 17 is provided with a plurality of sockets 21 with electric wires for individually mounting circuit switch components 19. A plurality of electric wires attached to the socket 21 are bundled below the first box body 17 to form a box-side wire harness (not shown). This box-side wire harness is connected to a vehicle-side wire harness (not shown) through a connector.

  The first cover 15, which is a cover, is attached to the opening 13 of the first box body 17 so as to cover the circuit switch component 19 attached to each socket 21. The first cover 15 is provided with a frame-shaped locking portion 23, and the frame-shaped locking portion 23 is elastically locked to a locking projection 25 provided on the peripheral edge of the opening 13 of the first box body 17, and the first cover 15. 15 is fixed to the first box body 17. On the inner surface of the first cover 15, there are provided display portions (see FIG. 6A) on which the names of auxiliary devices and the respective cautions corresponding to the arrangement patterns of the respective circuit switch components 19 are printed.

  As shown in FIG. 2B, a component presence / absence detection protrusion 27 is vertically provided on the inner surface of the first cover 15, and the circuit switch component 19 is mounted on the component presence / absence detection protrusion 27 in the arrangement pattern of the circuit switch component 19. It is disposed so as to be inserted into a component mounting space that is not provided.

Specifically, as shown in FIGS. 1 and 2, the first box body 17 includes a first socket 35, a second socket 36, and a third socket 37, which are component mounting spaces, among the plurality of sockets 21. , Fourth sockets 38 are provided.
First, the first arrangement pattern 33 of the first box body 17 mounted on the first vehicle shown in FIG. 2A is provided on the first socket 35, the second socket 36, and the fourth socket 38, which are component mounting spaces. The circuit switch components 19 (for example, the first relay 19a, the second relay 19b, and the fourth relay 19d) are respectively mounted, and the circuit switch component 19 is not mounted on the third socket 37. Thereby, the third socket 37 is a component mounting space in which no component is mounted. As shown in FIG. 2B, the component presence / absence detection protrusion 27 is inserted into the third socket 37 as a component mounting space in which the circuit switch component 19 is not mounted, so that the first cover 15 is inserted. Is provided on the inner surface.

  On the other hand, the second arrangement pattern 45 of the second box body 17A mounted on the second vehicle shown in FIG. 3A is provided on the first socket 35, the third socket 37, and the fourth socket 38, which are component mounting spaces. The first relay 3519a, the third relay 19c, and the fourth relay 19d are attached, respectively, and the second relay 19b is not attached to the second socket 36. As a result, the second socket 36 is a component mounting space in which no component is mounted. As shown in FIG. 3B, the component presence / absence detection projection 27 is inserted into the second cover 15A so that the tip is inserted into the second socket 36 as a component mounting space in which the circuit switch component 19 is not mounted. Is provided on the inner surface.

  Accordingly, as shown in FIG. 4, when the first cover 15 is attached to the second box body 17 </ b> A having the second arrangement pattern 45 mounted on the second vehicle, the component presence / absence detection protrusion 27 is attached to the third socket 37. The contact with the mounted third relay 19c prevents the first cover 15 from being mounted due to this interference.

Further, as shown in FIG. 5A, the component presence / absence detection protrusion 27 is formed in a hollow cylindrical shape that is easily elastically deformed, and is mounted in a component mounting space where a component should not be mounted. When the tip of the circuit switch component 19 hits, an excessive load is prevented from acting on the circuit switch component 19.
In addition, the component presence / absence detection protrusion 27A shown in the modification of FIG. 5B has a tip that hits the circuit switch component 19 mounted in the component mounting space where the component should not be mounted when the cover is mounted. It has the buffer part 51 which can be elastically deformed by the reaction force at the time. If the cover 15 is further closed while the component presence / absence detection projection 27A interferes with the circuit switch component 19, the component presence / absence detection projection 27A is elastically deformed by the buffer 51 and the reaction force from the circuit switch component 19 is detected. And an excessive load is not applied to the circuit switch component 19. Of course, the shape of the buffer portion is not limited to the shape of the buffer portion 51 of the present embodiment, and various shapes can be adopted based on the spirit of the present invention.

  The component presence / absence detection protrusion 27 is formed integrally with the first and second covers 15A when the first and second covers 15 and 15A made of synthetic resin are formed. In the first cover 15 and the second cover 15A described above, a display unit indicating the name of an auxiliary device corresponding to the vehicle is assembled to a mold for forming the first cover 15 and the second cover 15A. Molded by a slot. The first insert piece is provided with a protrusion forming portion for forming the component presence / absence detection protrusion 27 at the same time, and the second insert piece is provided with a protrusion forming portion for forming the component presence / absence detection protrusion 29 at the same time. That is, the display unit and the component presence / absence detection projection 27 or the component presence / absence detection projection 29 at a position corresponding to the display unit are formed inseparably.

Next, the effect | action of the cover incorrect assembly | attachment prevention structure of the relay box 11 which has the said structure is demonstrated.
In the cover incorrect assembly prevention structure of the relay box 11 according to the present embodiment, the first box body 17 attached to the vehicle has a plurality of circuit switch components 19 having a predetermined arrangement pattern 33 according to the vehicle. It is provided corresponding to the first socket 35, the second socket 36, the third socket 37, the fourth socket 38,.

Also, the second box body 17A attached to the vehicle has a first socket 35 and a second socket 36 in which a plurality of circuit switch components 19 are predetermined component mounting spaces with a second arrangement pattern 45 corresponding to the vehicle. , Third socket 37, fourth socket 38,...
That is, in the plurality of component mounting spaces secured in the first box body 17 or the second box body 17A, the circuit switch component 19 is mounted by the first or second arrangement pattern 33, 45, and the mounting There are things that are not. That is, the first or second arrangement pattern 33, 45 of the circuit switch component 19 is in accordance with the vehicle type, engine, vehicle grade, etc. of the vehicle.

  And in order to protect these circuit switch components 19, the 1st and 2nd cover 15 and 15A with which the 1st and 2nd box main bodies 17 and 17A are mounted correspond to the 1st or 2nd arrangement pattern 33 and 45, respectively. A display section is provided on which the name of the auxiliary device to be printed and each caution are printed. Therefore, a specific first cover 15 corresponding to the first box body 17 is attached to the first box body 17 attached to the vehicle, and the second box body 17A corresponds to the second box body 17A. The specific second cover 15A must be mounted.

  Therefore, on the inner surface of the first cover 15, there is a component presence / absence detection protrusion 27 whose tip is inserted into a third socket 37 which is a component mounting space in which the circuit switch component 19 is not mounted in the first arrangement pattern 33. Projected. The component presence / absence detection protrusion 27 is inserted into the third socket 37, which is a component mounting space in which the circuit switch component 19 is not mounted, only when the first cover 15 is mounted on the regular first box body 17. The first cover 15 is allowed to be attached.

  Further, a component presence / absence detection protrusion 29 whose tip is inserted into the second socket 36 which is a component mounting space in which the circuit switch component 19 is not mounted in the second array pattern 45 is formed on the inner surface of the second cover 15A. Projected. The component presence / absence detection protrusion 29 is inserted into the second socket 36, which is a component mounting space in which the circuit switch component 19 is not mounted, only when the second cover 15A is mounted on the regular second box body 17A. The mounting of the second cover 15A is allowed.

  On the other hand, when the first and second box bodies 17 and 17A and the first and second covers 15 and 15A do not match, the component presence / absence detection protrusions 27 and 29 are the second socket 36 or the second socket 36 which is a component mounting space. Interfering with the circuit switch component 19 (for example, the second relay 19b or the third relay 19c) mounted on the three socket 37 makes the mounting of the first or second cover 15, 15A impossible. Due to this cover unmountable state, the first cover 15 is not a regular one corresponding to the second box body 17A for the vehicle, or the second cover 15A is a regular one corresponding to the first box body 17 for the vehicle. It is detected that it is not. As a result, only the proper first or second cover 15 or 15A is attached to the first or second box body 17 or 17A mounted on the vehicle, and the first or second cover suitable for the power circuit of the vehicle is installed. 15,15A will definitely be installed.

  Moreover, in the cover incorrect assembly prevention structure of the relay box 11 according to the present embodiment, the display portion of the first cover 15 (second cover 15A) and the component presence / absence detection projection 27 (component presence / absence detection projection 29) are the same. Molded simultaneously by a piece. This facilitates the manufacture of the first and second covers 15 and 15A having different projecting positions of the component presence / absence detection protrusions 27 and 29 for each type, and the presence or absence of a component at an incorrect position on the first cover 15 or the second cover 15A. The detection protrusion 29 or the component presence / absence detection protrusion 27 is not molded.

  Therefore, according to the cover incorrect assembly prevention structure of the relay box 11 according to the present embodiment, the first and second covers 15 and 15A are confirmed while visually confirming the display portions provided on the first and second covers 15 and 15A. The first and second box bodies 17 and 17A do not need to be provided with an erroneous assembly detection structure.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

11 ... Relay box (electrical connection box)
15 ... 1st cover (cover)
15A ... Second cover (cover)
17 ... 1st box body (box body)
17A ... second box body (box body)
19: Circuit switch components 27, 29 ... Component presence / absence detection protrusions 33 ... First array pattern (array pattern)
35 ... 1st socket (part mounting space)
36 ... 2nd socket (part mounting space)
37 ... 3rd socket (part mounting space)
38 ... 4th socket (part mounting space)
45 ... second array pattern (array pattern)
51. Buffer part

Claims (3)

A box body attached to the vehicle;
A plurality of circuit switch parts housed in the box body and arranged in an arrangement pattern according to the vehicle to constitute an electric circuit;
A cover that is mounted on the box body and covers the plurality of circuit switch components;
A component presence / absence detection protrusion that is suspended from the inner surface of the cover and is inserted into a component mounting space in which the circuit switch component is not mounted in the array pattern,
An electrical junction box cover misassembly prevention structure characterized by comprising:   2. The component presence / absence detection protrusion includes a buffer portion that can be elastically deformed by a reaction force from the circuit switch component mounted in the component mounting space when a cover is attached. The structure for preventing incorrect assembly of the electrical junction box described in 1. The display part indicating the name of the auxiliary device according to the vehicle is molded by a insert piece assembled to a mold for molding the cover,
A structure for preventing erroneous assembly of a cover of an electrical junction box, wherein the insertion piece is provided with a projection forming portion for forming the component presence / absence detection projection.

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