JPH0447766Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is a magnetic head core (hereinafter referred to as the core) that forms the front plate of a magnetic head such as a video tape recorder.
The present invention relates to a front plate mounting structure in which the front plate is attached to a hold case while being pressed against and in close contact with the front plate.

[Conventional technology]

The conventional mounting structure for this type of front plate is as shown in FIG.
was in close contact with core 4. That is, contact plates 5 and 5' are formed that stand up vertically from both ends of the upper surface 3a of the approximately rectangular parallelepiped-shaped hold case 3 with the same width as the hold case 3, and the upper surfaces of these contact plates 5 and 5' are connected to the hold case. The core 4 and the front plate 1 are formed into a curved surface so as to be flush with the top surface when the front plate 1 is attached to the core 3. The assembly 6 in which the core 4 is attached to the bobbin 7 is inserted into the hold case 3, but the surface that comes into sliding contact with the magnetic tape (not shown) is formed into a curved shape, and the remaining front part 6a is inserted through the stepped part 6b. It has a flat notch. Therefore, assembly 6
When storing the core 4 in the hold case 3,
The curved part of the front surface of the assembly 6 including the abutting plate 5 is located on the same plane as the upper surface of the abutting plate 5, and one side of the assembly 6 (the side opposite to the stepped part 6b) is in contact with the inner surface of one abutting plate 5. The surface on the stepped portion 6b side faces the inner surface of the other contact plate 5', and the front surface 6 of the assembly 6
b is located on the same plane as the upper surface of the hold case 3. Further, a fitting hole 8 is formed in the upper surface 3a of the hold case 3 on the opposite side to the side where the assembly 6 is stored, extending from the center of the base of the inner surface of the abutment plate 5' along the longitudinal direction of the hold case 3. . The front plate 1, which has a projection 1 on the bottom surface that fits into the fitting hole 8, has the same width as the hold case 3, and the same thickness as the height of the step 6b of the assembly 6. The front surface is curved like the curved portion of the front surface of the assembly 6, and the length of the front plate 1 is equal to the surface of the opposing step 6a and the inner surface of the other contact plate 5'. It is formed shorter than the distance between the two. 2 is a curved leaf spring.

When attaching the front plate 1 to the hold case 3 having the above structure, the assembly 6 in which the core 4 is attached to the bobbin 7 is inserted into the hold case 3 in advance as shown in FIG. Next, the front plate 1 is attached to the front plate attachment part 9 formed by the upper surface part of the hold case 3 and the flat part of the assembly 6, which is located between the step part 6b of the assembly 6 and the abutment plate 5'. The bottom surface of the front plate 1 is brought into contact with the bottom face down, and the projection 1a of the front plate 1 is fitted into the fitting hole 8, thereby creating a gap between one longitudinal end face of the front plate 1 and the inner surface of the contact plate 5'. A leaf spring 2 is inserted into the portion in an elastic manner in the direction shown in FIG. 3, and the spring pressure of the leaf spring 2 brings the front plate 1 into close contact with the core 4.

[Problem that the invention attempts to solve]

However, when the front plate 1 is attached to the hold case 3 by the above-mentioned means, even if the front plate 1 can always be brought into close contact with the core 4 in an elastic manner, the parts of the leaf spring 2 are required. ,
This has the disadvantage that it becomes difficult to automate the assembly work. Further, since the leaf spring 2 requires parts, the number of parts to be assembled increases accordingly, and the number of man-hours for assembly increases accordingly, resulting in deterioration of workability.

This invention was made in view of the above circumstances,
An object of the present invention is to provide a front plate mounting structure that enables automation of assembly and reduces assembly man-hours by reducing the number of parts when attaching a front plate to a hold case.

[Means for solving problems]

The front plate mounting structure according to the present invention forms a protrusion along the longitudinal direction from one end side of the upper surface of the hold case, and a protrusion is formed along the protruding wall at one end of the hold case on both sides of the protrusion. A protrusion is provided in a direction perpendicular to the longitudinal direction, and a groove is provided on the face of the front plate facing the hold case, and this groove and the protrusion fit together, and one surface of the core incorporated in the hold case is fitted. , the front plate is inserted and fixed between the protrusions so that the front plate is in close contact with one side of the core, and the front plate and the hold case are bonded and fixed with synthetic resin and adhesive with the front plate in close contact. It is.

[Effect]

According to the present invention, the front plate is positioned in the width direction of the hold case by fitting the protrusions provided on the hold case with the grooves of the front plate, and the front plate is connected to the core incorporated in the hold case. The top of the protrusion is pressed and deformed between one side of the core and the protrusion on one end of the hold case, and the front plate is fitted and locked between the one side of the core and the protrusion, so the front plate is automatically tightly fixed to one side of the core. .

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. As shown in FIG. 1A, on one end of the upper surface of the approximately rectangular parallelepiped-shaped hold case 3, there is a protruding wall 10 that stands up vertically and has the same width as the hold case 3.The end surface is the same as the upper surface when the front plate 1 is attached. A storage section 11 is formed, which is curved so as to form a flat surface, and has wall surfaces formed on three sides for storing an assembly 6 in which the core 4 and the bobbin 7 are assembled on the other side.
The assembly 6 is housed in the container 1, and a synthetic resin is injected to fix the assembly 6. The tape sliding contact surface of this housing portion 11 is also formed in a curved shape similarly to the protruding wall 10. Next, on the upper surface of the hold case 3, a protruding portion 12 is formed in a U-shape or an I-shape from the center of the inner surface of the protruding wall 10 by a predetermined width toward the longitudinal direction of the upper surface and reaching the vicinity of the storage portion 11. As shown in FIG.
The protrusion 13 is perpendicular to the protrusion 12 along
There are several.

Here, the protrusion 13 has a substantially triangular cross-sectional shape, with the triangular top facing the storage portion 11 side,
The bottom part is formed as a protruding wall side, and the distance dimension between the top part of this protrusion 13 and the side wall end face 11a of the storage part 11, or the top part and the end face stepped part 6b of the core assembly.
The interval between them is set to be slightly shorter than the longitudinal dimension of the front plate 1.

The front plate 1 has a groove 1b in the longitudinal direction of the bottom surface into which the protrusion 12 provided on the upper surface of the hold case 3 fits.
is formed.

Therefore, in order to attach the front plate 1 to the hold case 3 formed as described above, it is necessary to place the front plate 1 with its bottom face down and attach the groove 1b and the protruding part provided on the hold case 3 in which the assembly 6 is assembled. 12, one end of the front plate 1 is aligned with the step 6b of the assembly 6, the other is positioned on the protrusion 13 provided on the inner surface of the protruding wall 10, and the end face 1c of the front plate 1 is fitted.
The top of the protrusion 13 is pressed and inserted so as to be crushed, and the front plate 1 is fitted and fixed to the hold case 3 and bonded as shown in FIG. A gap 14 is then formed between the front plate 1 and the hold case 3.
A synthetic resin agent is injected into the holding case 3, and the entire tape contacting surface of the hold case 3 is polished.

As described above, in the embodiment of the present invention, in the configuration in which the front plate 1 is inserted into the hold case 3, when the groove portion 1b provided on the front plate 1 and the protrusion portion 12 provided on the hold case 3 are fitted and positioned, At the same time, hold the end face of the front plate 1 on the protruding wall 10 of the case 3.
The protrusion 13 provided on the front plate 1 is brought into contact with the end face of the assembly 6 of the core 4 and the bomb 7, and the top of the protrusion 13 is crushed against one of the end faces of the front plate 1 to be fitted and locked. Since the front plate 1 can be adhesively fixed in this state, the front plate 1 is closely attached to the core 4, and assembly can be automated when attaching the front plate. Also,
Since there is no need for a plate spring component for tightly fixing the front plate to the core as in the conventional case, the number of parts is reduced accordingly, and as a result, the number of assembly steps can be reduced.

[Effects of the invention] According to the mounting structure of the front plate according to the present invention, the simple mounting method of simply fitting and gluing the front plate to the hold case has the excellent effect that assembly can be automated. play. Further, as a result of eliminating the need for leaf spring parts, the number of parts can be reduced, which has the remarkable effect of reducing the number of assembly steps.

[Brief explanation of the drawing]

1A and 1B are exploded perspective views of the mounting structure of the front plate showing an embodiment of the present invention, FIG. 2 is a front view showing the mounting state of the front plate shown in FIG. 1, and FIG. FIG. 2 is an exploded perspective view showing an example of a conventional front plate mounting structure. DESCRIPTION OF SYMBOLS 1...Front plate, 1b...Groove part, 3...Hold case, 10...Protruding wall, 12...Protruding part, 13
……protrusion.

Claims (1)

[Scope of utility model registration request] A protruding portion is formed along the upper surface of the hold case from one end side to the other end side, and the hold case has a protruding wall at one end and a core at the other end. A protrusion is formed in a direction perpendicular to the longitudinal direction of the shaped part, a groove is provided on the face of the front plate facing the hold case, and the front plate fits the groove and the protrusion, and is assembled into the hold case. A mounting structure for a front plate, characterized in that the front plate is inserted between the end face of a core and a protrusion, and is inserted and fixed by pressing and deforming the protrusion.