JP3979517B2 - Wire protection corrugated tube support structure of the housing - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention, wires drawn from the electrical connection box such as equipment fuse box in an automobile, cables and wire harness (hereinafter, these typically referred wire) wire protection corrugated tube supporting lifting structure of a housing for covering the About.
[0002]
[Prior art]
For fuse boxes containing electrical parts such as fuses, relays, and male and female terminal connectors, the end of the bellows-like corrugated tube is joined and fixed to the housing, and the wires connected to the electrical parts are passed through the corrugated tube and covered. I try to pull it out in a protected state.
[0003]
An example of a structure in which the end of the corrugated tube is coupled to and supported by a housing is described in Japanese Utility Model Laid-Open No. 54-167352 shown in FIG. A plurality of electric wires 24 are converged from the casing 20 constituting the fuse box and drawn through a corrugated tube 25. In order to connect the end portion of the corrugated tube 25 to the housing 20, an elongated tongue piece 22 is provided so as to protrude from the wire lead-out portion 21 of the housing 20, and a locking convex portion 23 is provided at the tip of the tongue piece 22. ing. In this structure, the corrugated tube 25 is fixed to the wire lead-out portion 21 of the housing 20 by fitting the locking convex portion 23 into the valley peripheral portion of the corrugated tube 25 from the inside.
[0004]
On the other hand, as another structural example for supporting the corrugated tube, it is conventionally practiced to bind the end of the corrugated tube to a wire drawing portion provided in the housing of the fuse box with a tape.
[0005]
However, in the corrugated tube support structure described in the former publication, since the wire lead-out portion 21 and the tongue piece 22 are provided on the housing 20 side in order to fix the end portion of the corrugated tube 25, the structure is complicated and This is disadvantageous for a vehicle body that is enlarged and limited in installation space. In addition, the locking protrusion 23 at the tip of the tongue piece 22 is easily detached from the valley periphery of the corrugated tube, which is problematic in terms of wiring reliability.
[0006]
Further, the corrugated tube support structure that is bound by the latter tape has a problem that the corrugated tube is easily detached from the casing when the tape deteriorates and loosens due to use over time, or loosens due to vibration of the vehicle body. Also, the work of binding with tape is troublesome.
[0007]
As another problem related to the above, for example, two types of electric wires are pulled out separately through two corrugated tubes with different bellows diameters, and the wires are bent in different directions immediately after being pulled out of the housing. This is the case. In this case, naturally, the two large and small corrugated tubes are also bent in different directions immediately after being pulled out, but it is impossible to bind and fix the two large and small corrugated tubes using the above-mentioned tape.
[0008]
[Problems to be solved by the invention]
As described above, when fixing two corrugated tubes of different sizes, the structure can be replaced with a conventional tape. In the case of a fuse box, it can be considered that the fuse body is sandwiched between rigid bodies such as a box body and a box cover. At that time, if the two large and small corrugated tubes are sandwiched side by side, it is disadvantageous particularly in a fuse box which is limited to a lateral installation space. On the other hand, when two large and small corrugated tubes are sandwiched vertically in the vertical direction, there is an advantage that space can be saved in the horizontal direction. However, when sandwiched vertically, one of the two large and small corrugated tubes must overlap each other, so that a sufficient clamping force cannot be applied in the vertical direction and the corrugated tubes fall off. There is a fear.
[0009]
Accordingly, an object of the present invention is to provide a space-saving and simple and reliable corrugated tube particularly in a portion where several types of electric wires are drawn out from a housing such as a fuse box through different corrugated tubes. and to provide a wire protective corrugated tube supporting lifting structure and can be fixed housing.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the wire protection corrugated tube support structure for a housing according to claim 1 according to the present invention is provided with a plurality of corrugated tubes for covering and protecting a plurality of different types of wires from the housing, A fuse box containing electrical components is attached to the casing, and the corrugated tube is pressed by a side wall of the fuse box, and the corrugated tube is fixed to a wall portion on one end opening side in the longitudinal direction of the casing. Corrugated tube support structure,
A substantially circular locking recess is provided on the wall on the opening end side in the longitudinal direction of the housing for the number of engagement and holding of the outer periphery by inserting the corrugated tube,
The number of the locking recesses communicates with each other through adjacent cutouts in which a part of the circumference is cut out, and an opening into which the corrugated tube is inserted in the uppermost lock recess. The imaginary straight line YY connecting the centers of all the recesses of the number of the locking recesses is configured to be inclined with respect to the insertion direction to the locking recess positioned at the uppermost position of the corrugated tube. It is characterized by that.
[0011]
From the above configuration, the plurality of corrugated tubes are fixed at the diagonally upper and lower positions on the virtual straight line YY inclined with respect to the corrugated tube insertion direction in the locking recess of the one wall portion. The fixing space is reduced as compared with the case where a plurality of corrugated tubes are fixed side by side, and the size of the housing and the housing space can be minimized. In addition, since a plurality of corrugated tubes are located on the virtual straight line Y-Y, a part of both overlap each other in the vertical and horizontal directions and interfere with each other, and the movement of each other is regulated to drop off from the wire drawing portion. This is effective.
[0012]
Further, the wire protection corrugated tube supporting lifting structure of a housing according to claim 2, when the corrugated tube is large and small different two bellows diameter (5,6), on the imaginary straight line Y-Y, the One of the locking recesses 3 for fixing the large-diameter corrugated tube 5 is positioned obliquely above, and the other locking recess 4 for fixing the small-diameter corrugated tube 6 is positioned positioned diagonally below and communicates. It is characterized by that.
[0013]
In this case, as a specific example of the above-mentioned claim 1, by fixing the large-diameter corrugated tube 5 and the small-diameter corrugated tube 6 having different bellows diameters at an oblique upper position and an oblique lower position on the virtual straight line YY, Part of the large and small diameter corrugated tubes 5 and 6 overlap each other in the vertical and horizontal directions and interfere with each other, thereby restricting the vertical and horizontal movements.
[0014]
Further, the wire protection corrugated tube supporting lifting structure of a housing according to claim 3, substantially circular locking recess of the number fraction formed in the wall portion of one longitudinal end open side of the housing 1 The inner surface of 3 and 4
Along the inner surface of the locking recess 3 and 4, wherein the engaging rib 3a which engages the respective trough periphery of the large diameter of the corrugated tube 5, 6, 4a are formed.
[0015]
From the above configuration, when the troughs of the large and small corrugated tubes 5 and 6 are fitted into the locking ribs 3a and 4a provided in the locking recesses 3 and 4, the movement of the corrugated tubes 5 and 6 in the axial direction It is effective in preventing the deviation.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a support structure for an electric wire protection corrugated tube according to the present invention will be described in detail with reference to the drawings.
[0019]
FIGS. 1A and 1B are a perspective view and a side view showing a box cover 1 of a housing referred to in the present invention in a fuse box equipped with an automobile to which the support structure of the present embodiment is applied. As one wall portion of the casing in the present invention, one end opening side in the longitudinal direction of the cover main body 2 resin-molded in a concave groove-shaped casing is an electric wire from the fuse box 10 shown in each figure of FIG. It is an external drawer. In this example, two locking recesses 3 and 4 are provided in the lead-out portion in communication with each other, and the large diameter shown in each of the drawings after FIG. A plurality of different kinds of electric wires (not shown) are drawn out of the housing through the two small-diameter corrugated corrugated tubes 5 and 6.
[0020]
Therefore, the locking recesses 3 and 4 are formed in a circular shape having a circumferential curvature matching the outer peripheral diameter of the large and small corrugated tubes 5 and 6 and communicated with each other by cutting out a part of both circles. Further, an imaginary straight line YY connecting the center points of both circles of the locking recesses 3 and 4 is a large and small corrugated tube with respect to the vertical line in the vertical direction in the figure, that is, with respect to the locking recesses 3 and 4. It is inclined at an angle of, for example, approximately 45 ° with respect to the direction in which 5 and 6 are inserted. In this case, the large-diameter locking recess 3 for locking and fixing the large-diameter corrugated tube 5 is positioned obliquely above the virtual straight line YY, and the small-diameter locking recess 4 for locking and fixing the small-diameter corrugated tube 6 is virtual. It is located obliquely below the straight line YY. By doing so, the locking recesses 3 and 4 are displaced so as not to overlap each other in the vertical and vertical directions and not in the horizontal and horizontal directions.
[0021]
Further, the locking recesses 3 and 4 are provided with locking ribs 3a and 4a along their inner peripheral surfaces, and are engaged with the valley peripheral portions 5b and 6b of the large and small diameter corrugated tubes 5 and 6 so The support and fixing of the small-diameter corrugated tubes 5 and 6 are made more effective.
[0022]
As shown in the figure, the side wall surface of the cover main body 2 of the box cover 1 is provided with a plurality of fitting concave rings 7 and coupling guide convex pieces 8 in the longitudinal direction thereof. It is provided for connection with a fuse box 10 containing electrical components such as fuses and relays. The fuse box 10 is coupled to a plurality of fitting protrusions 13 on both sides of the side wall of the box body 11 in preparation for fitting and engagement with the fitting concave ring 7 and the coupling guide convex piece 8 on the box cover 1 side. Guide concave grooves 14 are provided at corresponding locations.
[0023]
Next, the mode of assembling the box cover 1 constructed as described above by coupling it to the fuse box 10 is shown in FIGS. 2A and 2B and subsequent drawings, and the operation at that time will be described.
[0024]
As shown in FIGS. 2 (a) and 2 (b), in preparation for assembly, the box cover 1 has large and small corrugated tubes 5 and 6 corresponding to the two large and small engaging recesses 3 and 4 provided in the cover body 2. Is inserted so as to be dropped from above in the vertical direction, and is engaged with almost one touch. The large-diameter corrugated tube 5 and the small-diameter corrugated tube 6 are prevented from shifting in the longitudinal direction of the tube by engaging the locking ribs 3a and 4a on the locking recesses 3 and 4 side with the valley peripheral portions 5b and 6b. Is done.
[0025]
In FIG. 2B, when the two corrugated tubes 5 and 6 having a large diameter and a small diameter are completely engaged with and fixed to the locking recesses 3 and 4, the large and small corrugated tubes 5 and 6 are imaginary straight line Y. Located diagonally above and diagonally below -Y. Thereby, the large-diameter corrugated tube 5 on the oblique upper side and the small-diameter corrugated tube 6 on the oblique lower side are supported in such a manner that they are shifted from each other by an inclination angle in the vertical and horizontal directions and in the horizontal and horizontal directions and partly interfere with each other vertically and horizontally. .
[0026]
In this state, as shown in FIG. 3, the fuse box 10 is assembled to the box cover 1 holding the large and small diameter corrugated tubes 5, 6 from the relative direction. In other words, by fitting and engaging the fitting concave ring 7 and the coupling guide convex piece 8 on the box cover 1 side with the plurality of fitting projections 13 and the coupling guide concave groove 14 of the fuse box 10, the fuse is almost one touch. The box cover 1 is joined to the box 10 and assembled.
[0027]
In conjunction with such assembly, electric wires (not shown) connected to electrical components accommodated in the fuse box 10 are separately drawn out as a plurality of different types and are held in the box cover 1, for example, large and small corrugated tubes 5, 6 is pulled out of the box in a state of being covered and protected, and routed around the vehicle body outside the figure.
[0028]
As shown in FIG. 4, after the assembly of the box cover 1 and the fuse box 10 is completed, the large and small diameter corrugated tubes 5 and 6 held in the box cover 1 in a protected state by passing the electric wires through the inside are further fused from above. The shape is pressed by the side wall 12 of the box 10. That is, as the large and small diameter corrugated tubes 5 and 6, some of them interfere with each other to restrict movements in the vertical direction and the horizontal direction, and at the same time, they are pressed by the side wall 12 of the fuse box 10 from above. Therefore, the movement is sealed in all directions in the longitudinal direction of the tube and in the vertical and horizontal directions and firmly supported. As a result, even if the electric wire is bent in the wiring direction immediately after being pulled out, and the large and small corrugated tubes 5 and 6 are bent accordingly, the movement is sealed as described above, so that the large and small corrugated tubes 5 and 6 are pulled out. The concern of falling off the department is wiped out.
[0029]
As understood from the above configuration and operation, since the large and small corrugated tubes 5 and 6 are disposed obliquely above and obliquely below, the width of the box cover 1, that is, the side wall as compared with the case where the large and small corrugated tubes 5 and 6 are disposed side by side. Twelve lateral dimensions can be minimized. In other words, since the size of the fuse box can be avoided even from the whole, the space can be reduced when the installation space of the automobile body is strictly restricted.
[0030]
【The invention's effect】
As described above, the wire protection corrugated tube support structure according to claim 1 according to the present invention has a plurality of corrugated tubes positioned obliquely above and obliquely below the virtual straight line YY in the locking recess. Therefore, the fixing space is reduced as compared with the case where the plurality of corrugated tubes are fixed side by side, and the size of the housing and the housing space can be minimized. In addition, since multiple corrugated tubes are positioned on the virtual straight line Y-Y, both parts overlap each other in the vertical and horizontal directions, interfere with each other, and regulate each other's movement to effectively prevent dropping. it can.
[0031]
Moreover, the support structure of the electric wire protection corrugated tube according to claim 2 is, as a specific example of the above-mentioned claim 1, a large-diameter corrugated tube and a small-diameter corrugated tube having different bellows diameters in an oblique upper position on the virtual straight line YY. Positioning and fixing at an obliquely lower position is effective in restricting the movement in the vertical and horizontal directions by causing some of the large and small corrugated tubes to overlap each other in the vertical and horizontal directions.
[0032]
Moreover, the support structure of the electric wire protection corrugated tube according to claim 3 is configured such that a trough portion of the large and small diameter corrugated tube is fitted into a locking rib provided in the locking recess so that the corrugated tube moves in the axial direction. It is effective in preventing the deviation.
[Brief description of the drawings]
FIGS. 1A and 1B are a perspective view and a side view showing a box cover in an automotive equipment fuse box to which an embodiment of a support structure for a wire protection corrugated tube according to the present invention is applied. .
FIGS. 2A and 2B are an exploded perspective view showing an aspect in which two corrugated tubes of large and small diameters of this example are engaged and fixed to the box cover, and an assembled side view showing after fixing. is there.
FIG. 3 is an exploded perspective view showing a state in which a box cover and a fuse box after holding a corrugated tube are assembled and assembled.
FIG. 4 is an assembly perspective view showing a state after the box cover and the fuse box are coupled to each other.
FIG. 5 is a perspective view showing a corrugated tube support structure described in the publication as a conventional example.
[Explanation of symbols]
1 Box cover (housing)
2 Cover body 3 Locking recess 3a corresponding to large diameter corrugated tube Locking rib 4 Locking recess 4a corresponding to small diameter corrugated tube Locking rib 5 Large diameter corrugated tube 5a Mountain area 5b Valley area 6 Small diameter corrugated tube 6a Mountain area Portion 6b trough portion 7 concave ring for fitting 8 coupling guide convex piece 10 fuse box 11, 12 side wall 13 fitting projection 14 coupling guide concave groove

Claims (3)

A plurality of corrugated tubes for covering and protecting a plurality of different types of electric wires are pulled out from the housing, a fuse box containing electrical components is attached to the housing, and the corrugated tube is pressed on the side wall of the fuse box. A corrugated tube supporting structure for fixing the corrugated tube to a wall portion on one end opening side in the longitudinal direction of the casing,
A substantially circular locking recess is provided on the wall on the opening end side in the longitudinal direction of the housing for the number of engagement and holding of the outer periphery by inserting the corrugated tube,
The number of the locking recesses communicates with each other through adjacent cutouts in which a part of the circumference is cut out, and an opening into which the corrugated tube is inserted in the uppermost lock recess. The imaginary straight line YY connecting the centers of all the recesses of the number of the locking recesses is configured to be inclined with respect to the insertion direction to the locking recess positioned at the uppermost position of the corrugated tube. An electric wire protection corrugated tube support structure for a casing.   In the case where the corrugated tubes have two bellows diameters different in size, on the virtual straight line YY, the one locking recess for fixing the large-diameter corrugated tube is positioned obliquely above to fix the small-diameter corrugated tube 2. The wire protection corrugated tube support structure for a housing according to claim 1, wherein the other locking recess is provided obliquely below and communicates therewith. The inner surface of the number of the substantially circular locking recesses formed on the wall portion on the one end opening side in the longitudinal direction of the housing,
3. A wire protection corrugated tube support structure for a housing according to claim 2, wherein a locking rib is formed along the inner surface of the locking recess to engage with each valley periphery of the large and small diameter corrugated tube. .

Images