JP2000349455A - Shelf frame structure of electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shelf frame structure of electronic equipment which is improved in the size precision between an upper and a lower chassis. SOLUTION: The shelf frame structure of electronic equipment has a side late 3 fixed to both sides of upper and lower chassis 1 by a fixture 4; and positioning projection pieces 6a are projected in level with the upper and lower chassis 1 and fitted in positioning holes 6b formed in the side plate 3 to position the upper and lower chassis 1 and side plate 3. The positioning projection pieces 6a are in level with the upper and lower chassis 1 and 2, so the upper and lower chassis 1 and side plate 3 are positioned by fitting those positioning projection pieces 6a in the positioning holes 6b of the side plate 3, thereby improving the size precision between the upper and lower chassis 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shelf frame structure of an electronic device with improved dimensional accuracy between upper and lower chassis.

[0002]

2. Description of the Related Art As a conventional shelf frame structure of an electronic device, for example, the one shown in FIGS. 5 and 6 is known.

In the conventional shelf frame structure, bent portions c and d which are bent downward are formed at left and right ends of an upper chassis a and a lower chassis b which are vertically arranged with an interval L therebetween. And the fasteners e are attached to the bent portions c and d.
The upper and lower chassis a, b
The upper and lower chassis a, b and the side plate f
A plurality of positioning protrusions g for performing positioning, a screw hole h for screwing the fixing tool e, and a positioning hole i for fitting the positioning protrusion g on the side plate f side, and a mounting for inserting the fixing tool e. Each of the holes j is provided.

In the conventional shelf frame structure, when assembling the shelf frame k, a plurality of positioning projections g protruding from the bent portions c and d of the upper and lower chassis a and b are positioned on the side plate f. After the holes i are fitted and the upper and lower chassis a and b and the side plate f are positioned, the fixing tool e inserted from the mounting hole j of the side plate f is screwed into the screw hole h on the upper and lower chassis a and b. By tightening, the shelf board frame k is assembled.

[0005]

However, in the above-mentioned conventional shelf frame structure, positioning projections g are protruded from the bent portions c and d of the upper and lower chassis a and b. As a result, the dimensional accuracy of the positioning projections g is likely to vary, and as a result, the dimensional accuracy of the distance L between the upper and lower chassis a and b of the assembled shelf frame is poor.

When positioning the upper and lower chassis a and b and the side plate f by simultaneously fitting the plurality of positioning protrusions g into the positioning holes i opened in the side plate f, the dimensional accuracy of the positioning protrusions g varies. Often, the fasteners f are tightened without noticing that some of the positioning projections g are not fitted in the positioning holes i, and as a result, the side plates f are deformed, and the appearance of the shelf frame is impaired. There are also problems such as.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a shelf frame structure of electronic equipment in which dimensional accuracy between upper and lower chassis is improved.

[0008]

In order to achieve the above object, according to the present invention, positioning projections projecting on the same plane of the upper and lower chassis are fitted into positioning holes formed in the side plate.
Since the upper and lower chassis and the side plate are positioned, the dimensional accuracy between the upper and lower chassis can be improved.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a shelf frame structure of an electronic device in which side plates are fixed to both sides of upper and lower chassis by a fixing tool. Positioning protrusions are projected so as to be flush with the upper and lower chassis, and these positioning protrusions are fitted into positioning holes formed in the side plate to position the upper and lower chassis and the side plate. is there.

With the above structure, since the upper and lower chassis and the positioning projection are on the same plane, the positioning projection is fitted into the positioning hole of the side plate to assemble the shelf frame, thereby improving the dimensional accuracy between the upper and lower chassis. be able to.

Further, since the positioning projections of the upper and lower chassis are fitted into the positioning holes of the side plate to tighten the fixing member, the fixing member is not tightened without noticing that both are not fitted. Deformation can be prevented beforehand.

According to a second aspect of the present invention, a hook is provided on both sides of the positioning projection to engage with an end of a positioning hole formed in the side plate.

[0013] According to the above configuration, the work of fastening the fastener can be performed in a state where the upper and lower chassis and the side plate are temporarily fixed by the hook, so that the workability can be improved.

According to a third aspect of the present invention, the mounting hole for inserting the fixing tool, which is opened in the side plate, has a large diameter such that the head of the fixing tool does not come off.

With this configuration, even if the screw holes formed on the upper and lower chassis sides and the mounting holes opened on the side plate have dimensional variations, the screw holes and the mounting holes can be surely matched. In addition, the fastening operation of the fixing tool can be easily and efficiently performed.

According to a fourth aspect of the present invention, a positioning means comprising a positioning projection and a positioning hole is provided between a rear plate attached to the rear surface of the shelf frame and the upper and lower chassis.

According to the above configuration, since the back plate can be accurately attached to the upper and lower chassis, the positional accuracy of the connector of the motherboard attached to the back plate is improved, and thereby the connector of the printed board mounted between the upper and lower chassis. Can be securely fitted to the connector of the motherboard.

FIG. 1 and FIG. 2 show an embodiment of the present invention.
This will be described in detail with reference to the drawings shown in FIG.

FIG. 1 is a perspective view showing an assembled state of a shelf frame, and FIG.
FIG. 4 is a detailed view of a positioning means provided between the upper and lower chassis and the side plate.

In these figures, reference numeral 1 denotes an upper chassis, and 2 denotes a lower chassis, each of which is formed of a metal plate. On both sides of the upper and lower chassis 1, 2 are formed bent portions 1a, 2a which are bent downward. Have been.

Reference numerals 3 denote side plates provided on both sides of the upper and lower chassis 1 and 2. Mounting holes 3 a having a diameter large enough to prevent the head 4 a of the fixing tool 4 opened in these side plates 3 from coming out.
By screwing the fastener 4 inserted into the screw holes 1b and 2b formed in the bent portions 1a and 2a of the upper and lower chassis 1 and 2, the shelf frame 5 is formed by the upper and lower chassis 1 and the side plate 3. Assembled.

A positioning means 6 for positioning the upper and lower chassis 1 and 2 and the side plate 3 is provided between both side portions of the upper and lower chassis 1 and 2 and the side plate 3.

As shown in FIG. 2, the positioning means 6 has a plurality of protruding positioning protruding pieces 6a projecting laterally so as to be flush with the upper and lower chassis 1 and 2, and is opened on the side plate 3. It comprises a slit-shaped positioning hole 6b.

The positioning projections 6a are used to bend the both sides of the upper and lower chassis 1 and 2 when forming the bent portions 1a.
a, 2a, and the bent portion 1 is positioned so that the positioning projection 6a remains on the same plane of the upper and lower chassis 1, 2.
It is formed by bending a and 2a, and has a width set so as to fit into a slit-shaped positioning hole 6b opened in the side plate 3.

A positioning hole 6b opened in the side plate 3
Is the distance L 'between the upper and lower chassis 1 and 2, and the distance L'
Are formed with high precision so as to match.

Next, a method of assembling the shelf frame 5 configured as described above will be described.

In assembling the shelf frame 5, first, positioning holes 6b opened in the side plate 3 are fitted into a plurality of positioning projections 6a projecting from both sides of the upper and lower chassis 1, 2. Then, the upper and lower chassis 1 and 2 and the side plate 3 are positioned.

Next, in this state, the fixing tool 4 inserted from the mounting hole 3a of the side plate 3 is screwed into the screw holes 1b, 2b formed in the bent portions 1a, 2a of the upper and lower chassis 1, 2.
The shelf frame 5 is assembled by tightening the fixing members 4. Since the positioning projections 6a are formed on the same plane as the upper and lower chassis 1, 2, the assembly between the upper and lower chassis 1, 2 is performed. The distance L is determined by the distance L 'between the upper and lower positions of the positioning holes 6b opened in the side plate 3. Therefore, by forming the distance L' between the positioning holes 6b of the side plate 3 with high precision in advance, the upper and lower chassis 1, 2 are formed. The dimensional accuracy between them can be improved.

Since the protruding positioning protruding piece 6a is fitted into the slit-shaped positioning hole 6b, the fastener 4 is tightened when the positioning protruding piece 6a is not fitted into the positioning hole 6b during assembly. Therefore, the deformation of the side plate 3 can be prevented.

FIG. 3 shows a modified example of the positioning means 6. In this modified example, hooks 6c are protruded on both sides of a positioning projection 6a, and these hooks 6c are inserted into the positioning holes 6a.
The upper and lower chassis 1 and 2 and the side plate 3 can be temporarily fixed by being locked to both ends of b.

Thus, when the upper and lower chassis 1 and 2 and the side plate 3 are fixed by the fixing tool 4, the worker can use both hands for the work, so that the workability can be improved.

FIG. 4 shows another embodiment in which the same positioning means 6 as described above is provided also on the back plate 7 attached to the rear surface of the shelf frame 5, and FIG. The motherboard 9 mounted on the inside, 9 indicates a connector provided on the motherboard 8.

According to the above configuration, since the back plate 7 can be accurately attached to the upper and lower chassis 1 and 2,
The dimensional accuracy between the connector 9 of the motherboard 8 attached to the upper and lower chassis 1 and the upper chassis 1 is improved, so that the connector (both not shown) of the printed circuit board mounted between the upper and lower chassis 1 and 2 is surely secured. Can be fitted to the connector 9.

[0034]

As described in detail above, according to the present invention, positioning projections projecting from both sides of the upper and lower chassis so as to be flush with the upper and lower chassis are fitted into the positioning holes of the side plates.
Since the side plate is positioned with respect to the upper and lower chassis, the dimensional accuracy between the upper and lower chassis can be improved, and the positioning protrusions of the upper and lower chassis are fitted into the positioning holes of the side plate to fasten the fasteners. Therefore, the fasteners are not tightened without noticing that they are not fitted, and the deformation of the side plate can be prevented beforehand, so that the appearance of the side plate is not impaired.

Further, since hooks for engaging with the ends of the positioning holes formed in the side plates are provided on both sides of the positioning projections, the fastening operation is performed with the upper and lower chassis and the side plates temporarily fixed by the hooks. Can be performed, the workability can be improved, and the mounting holes for the fasteners, which are opened in the side plates, have a large diameter so that the heads of the fasteners do not come out. Even if there is a dimensional variation between the hole and the mounting hole opened on the side plate side, the screw hole and the mounting hole can be surely matched, so that the fastening work of the fastener can be performed easily and efficiently. .

Further, since the positioning means including the positioning projections and the positioning holes is provided between the rear plate and the upper and lower chassis mounted on the rear surface of the shelf frame, the rear plate can be accurately mounted on the upper and lower chassis. The positional accuracy of the connector of the motherboard attached to the back plate is improved, so that the connector of the printed circuit board mounted between the upper and lower chassis can be securely fitted to the connector of the motherboard.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a shelf frame structure of an electronic device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a positioning means used in the shelf frame structure of the electronic device according to the embodiment of the present invention;

FIG. 3 is a perspective view showing a modification of the positioning means used in the shelf frame structure of the electronic device according to the embodiment of the present invention;

FIG. 4 is a perspective view showing a shelf frame structure of an electronic device according to another embodiment of the present invention.

FIG. 5 is a perspective view showing a shelf frame structure of a conventional electronic device.

FIG. 6 is a perspective view of a positioning means used for a conventional shelf frame structure of an electronic device.

[Explanation of symbols]

 Reference Signs List 1 upper chassis 1a bent portion 1b screw hole 2 lower chassis 2a bent portion 2b screw hole 3 side plate 3a mounting hole 4 fixing tool 5 shelf frame 6 positioning means 6a positioning protrusion 6b positioning hole 6c hook 7 back plate 8 motherboard 9 connector L Distance between upper and lower chassis L 'Distance between positioning holes

Claims (4)

[Claims] 1. A shelf frame structure for an electronic device in which side plates are fixed to both sides of an upper and lower chassis by fasteners, and positioning projections project from both sides of the upper and lower chassis so as to be flush with the upper and lower chassis. A shelf frame structure for an electronic device, wherein the positioning projections are fitted into positioning holes formed in the side plate to position the upper and lower chassis and the side plate. 2. The shelf frame structure of an electronic device according to claim 1, wherein hooks that engage with ends of positioning holes formed in the side plate are provided on both sides of the positioning protrusion. 3. The shelf frame structure of an electronic device according to claim 1, wherein the mounting hole for inserting the fixing tool, which is opened in the side plate, has a large diameter so that the head of the fixing tool does not come off. 4. The shelf frame structure for an electronic device according to claim 1, further comprising a positioning means comprising a positioning projection and a positioning hole provided between the rear plate and the upper and lower chassis mounted on the rear surface of the shelf frame.