JPH0525274Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a metal bracket attachment mechanism for attaching a metal cabinet and a metal bottom plate to a chassis body in equipment such as a video tape recorder. .

(B) Prior Art The applicant previously filed an application for a metal plate connection structure shown in FIGS. 8 and 9 in Utility Application No. 1983-5019.

In FIGS. 8 and 9, 11 is a plastic chassis, 43 is a metal bracket, 34 is a metal side plate, and 36 is a metal bottom plate.

Side plate 12 and bottom plate 1 of plastic chassis 11
3 are provided with through holes 14 and 15, and the metal bracket 4 is connected to the plastic chassis 11.
3, insert it as shown by the dashed-dotted line in FIG. 8, and then lock it by rotating it in the direction A' in FIG. 9. In this locked state, the first flat part 40 and the second flat part 24 of the metal bracket 43 fit into the through holes 14 and 15, respectively, and the tongue part 42 of the metal bracket 43
It engages with a protrusion 44 formed on the side plate 12 of the plastic chassis 11 to restrict rotation of the metal bracket 43 in the counterclockwise direction (FIG. 9).

In this state, the metal side plate 34 is attached to the first flat part 40.
Then, the metal bottom plate 36 is brought into contact with the second flat part 24, and the screws 35, 3 are inserted from the metal plates 34, 36 side.
7 is screwed into the screw holes 26 and 27 and fixed. At this time, the contact between the metal bracket 43, the metal side plate 34, and the metal bottom plate 36 is surface contact, so that electrical continuity is ensured.

(C) Problems to be Solved by the Invention However, in the prior art, the rotation in the counterclockwise direction in FIG. This structure requires delicate dimensional accuracy in order to optimize the engagement state. That is, when the contact between the tongue piece 42 and the protruding piece 44 is weak, the force that restricts rotation in the counterclockwise direction (FIG. 9) is weak, and when the contact is strong, the metal When attaching the bracket 43, it may become difficult to press fit or a complete fit may not be obtained. Furthermore, even if optimal dimensional accuracy is obtained, if the same force applied in the clockwise direction (Fig. 9) during press-fitting is applied in the counterclockwise direction (Fig. 9) in the mated state, the engagement will occur. This will result in a mismatch.

The object of the present invention is to ensure a reliable and stable fit between a plastic chassis and a metal bracket.

(d) Means for Solving the Problems The present invention has a first flat portion and a second flat portion that are in surface contact with the metal side plate and the metal bottom plate through the through holes formed in the side plate and the bottom plate of the plastic chassis. In the structure for attaching a metal bracket having a metal bracket to the plastic chassis, a locking means is disposed around the through hole for locking the metal bracket guided along the surface of the plastic chassis. shall be.

(E) Effect According to the present invention, the metal bracket is locked to the plastic chassis by the locking means.

(F) Embodiment An embodiment of the present invention will be described below with reference to the drawings.

Figures 1 to 7 are related to the present invention, and Figure 2 is
A perspective view showing the external appearance of the metal bracket, FIG. 3 is a front view showing the vicinity of the fitting part of the plastic chassis side plate with the metal bracket, FIG. 4 is a sectional view taken along the line A-A in FIG. 3, and FIG. is B in Figure 3
- A sectional view of the stairs along line B is shown.

In FIGS. 2 to 5, reference numeral 52 indicates a through hole formed in the side plate 54 of the plastic chassis 51;
3 is a through hole formed in the bottom plate 65. Side plate 64
Joint surfaces 54, 55, and 56 with the metal bracket 1 are formed around the through hole 52 formed in the metal bracket 1. The joint surfaces 54, 55, and 56 are formed inwardly compared to the outer surface 57 of the side plate 64, creating a step between them, and a state in which the metal bracket 1 is depressed by the thickness of the joint portion. There is. Reference numeral 58 indicates a rotation regulating portion, and reference numeral 59 indicates a locking claw; these 58, 59
When the metal bracket 1 is fitted together with the joint surfaces 54, 55 and 56, these act as a locking means.

The metal bracket 1 is connected to the plastic chassis 5.
It consists of a first flat part 2, a second flat part 3 that fit into the through holes 52 and 53 of 1, respectively, and an L-shaped part 4 that connects these flat parts 2 and 3. The first flat portion 2 includes a rotation regulating portion 5 disposed on the plastic chassis 51.
A rotation regulating piece 5 and a locked piece 6 are formed to engage with the locking claw 59 and the locking claw 59, respectively. 7 is the joint surface 5 when fitted with the plastic chassis 51.
This is a notch to avoid contact with 6, and 8,9
is a screw hole.

Metal bracket 1 and plastic chassis 51
3, insert the second flat part 3 of the metal bracket 1 from the tip direction into the through hole 52 formed in the side plate 64 of the plastic chassis 51 from the front direction in FIG. ,5
5, 56 and the first flat part 2 are joined and attached so as to fit into the stepped part. At this time, the second flat portion 3 is fitted into a through hole 53 formed in the bottom plate 65 of the plastic chassis 51. The state at this time is as shown in FIG. 6, and this is the first fitted state.

From the first fitted state, further move the metal bracket 1 to the left in FIG.
6 as a guide surface to achieve the second fitted state shown in FIG. Since the locking pawl 59 has elasticity, it can easily engage with the locking pawl 6;
Once engaged, the locking pawl 59 is moved in the right direction in FIG. 4 (inward direction of the plastic chassis 51).
Unless pressed, the engagement will not come off, and even if a force is applied to the metal bracket 1 in the right direction in FIG. 7, it will not return to the first fitted state.

FIG. 1 shows C-C in the second fitted state shown in FIG.
It is a sectional view of the stairs along C line. In FIG. 1, 60 is a metal side plate, 61 is a metal bottom plate, and the metal side plate 60
is the first flat part 2, and the metal bottom plate 61 is the second flat part 3.
are fixed by screws 62 and 63, respectively. Metal bracket 1, metal side plate 60, and metal bottom plate 61
Since the contact with is a surface contact, electrical continuity is ensured.

In the second fitted state shown in FIGS. 1 and 7, the rotation of the metal bracket 1 in the counterclockwise direction (direction D) is prevented by the rotation restriction piece 5 engaging with the rotation restriction portion 58. Also, clockwise (E direction)
Rotation to is regulated by joint surfaces 54, 55, and 56. Therefore, the screws 62 and 63 prevent rotation even when a clockwise or counterclockwise force is applied to the metal bracket 1, such as when attaching the metal side plate 60 and the metal bottom plate 61.

It should be noted that the regulating force at this time is such that rotation can be restricted as long as a force to the extent that the plastic chassis 51 is not damaged is applied.

As mentioned above, in the second fitted state, the movement of the metal bracket 1 to the right in FIG.
The clockwise and counterclockwise rotations in FIG. 1 are the locking claw 59 and the locked piece 6,
The rotation regulating portion 58 and the rotation regulating piece 5 restrict the rotation.

(g) Effects of the invention As stated above, according to the invention, when a metal bracket is attached to a plastic chassis,
A reliable and stable fitted state can be obtained, and the metal bracket will not come off even if force is applied to it. It is also easy to install and has great effects.

[Brief explanation of the drawing]

Figures 1 to 7 relate to the present invention, and Figure 1 is
A sectional view showing the second fitted state of the plastic chassis and the metal bracket, Fig. 2 is a perspective view showing the external appearance of the metal bracket, and Fig. 3 is a front view showing the vicinity of the fitting part of the plastic chassis side plate with the metal bracket. Figure 4 is a sectional view taken along the line A-A in Figure 3, Figure 5 is a sectional view taken along the line B-B in Figure 3, and Figure 6 shows the first fitting of the plastic chassis and metal bracket. FIG. 7 is a diagram showing the second fitted state. 8 and 9 relate to the conventional example, FIG. 8 is a perspective view of the plastic chassis and metal bracket before they are attached, and FIG. 9 is a cross-sectional view showing the operation of the attachment and the state when they are fitted. Reveal each figure. 1... Metal bracket, 2... First flat part, 3
...Second flat part, 5...Rotation regulating piece (locking means),
6...Locked piece (locking means), 51...Plastic chassis, 52, 53...Through hole, 58...Rotation regulating portion (locking means), 59...Latching claw (locking means) means), 60...metal side plate, 61...metal bottom plate, 6
4...Side plate of plastic chassis, 65...Bottom plate of plastic chassis.

Claims (1)

[Claims for Utility Model Registration] A metal bracket having a first flat portion and a second flat portion that is in surface contact with a metal side plate and a metal bottom plate through through holes formed in the side plate and bottom plate of a plastic chassis, In the structure for attaching to the plastic chassis, the bracket attaching mechanism is characterized in that a locking means for locking the metal bracket guided along the surface of the plastic chassis is disposed around the through hole. .