JPH0668102U - Erase head case structure - Google Patents

Abstract

(57) [Abstract] [Purpose] An erase head case structure is obtained by improving the case structure body of the erase head to facilitate the assembly of the head portion including the center core and the front core to which the coil bobbin is assembled. It is in. [Structure] Inside a case body 1 which constitutes an erasing head, an inner cavity 2 into which a head portion is inserted from the back surface is formed, and an opening window portion 3 facing the front portion of the head portion is formed on the front surface, A plurality of rows of guide ridges 5 and 6 are formed on both inner wall surfaces of the lumen chamber 2, and one of the guide ridges 5 is extended to the side wall of the opening window 3. A plurality of rows of guide jetties 7 on the lower surface of the opening window 3 facing the head
And a plurality of rows of positioning jetties 8 for positioning the coil bobbins of the inserted head portion are formed inside the upper wall surface of the opening window portion 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an erasing head case structure used for erasing a signal recorded on a magnetic tape.

[0002]

[Prior art]

 Conventionally, various types of erasing heads used in this kind of audio tape recorder have been proposed in accordance with the equipment used.

That is, in a general erasing head, as shown in, for example, FIG. 4 and FIG. 5, a coil bobbin 11 forming a head portion is balanced-wound with a coil 12, and a winding winding is provided on a coil fixing portion 11a. It is fixed to the part and is led to the lead terminal 13 for attachment to the device. Then, the coil bobbin 11 is assembled to the center core 14, the front cores 15 and 15 are attached to the left and right of the center core 14, and the left and right of the front cores 15 and 15 are sandwiched by pressing members 16 such as leaf springs. It is formed by positioning, assembling it in the case body 17, back-molding with resin, and polishing the tape running surface into a mirror surface, as shown in FIG. Further, as shown in FIGS. 7A and 7B, in order to facilitate the assembling of the head portion to the case main body 20, the center core 18 and the front core 19 are molded in a special shape. is there.

[0004]

[Problems to be solved by the device]

 However, in the above-described conventional erasing head, when the center core with the coil bobbin and the front core are assembled to the case body, a pressing member such as a leaf spring that presses the front core from the left and right is required, and the number of parts is reduced. However, there was a problem that the assembly man-hours increased due to the increase in the number. Further, in the case where the center core and the front core are molded in a special shape, the cost of the core becomes extremely high, and there is a problem that it is not practical.

An object of the present invention is to solve the above problems of the conventional structure. The case structure main body of the erasing head is improved so that a head part including a center core and a front core, in which a coil bobbin is assembled, is formed. The purpose is to obtain a case structure for the erasing head that facilitates assembling.

[0006]

[Means for Solving the Problems]

 In order to achieve such an object, in the case structure of the erasing head according to the present invention, inside the case body constituting the erasing head, an inner cavity is formed in which the head part is inserted from the back side, and at the front side. An opening window facing the front part of the head is formed, and a plurality of rows of guide ridges are formed on both inner wall surfaces of the lumen chamber, and one of these guide ridges is opened. Extending to the side wall of the window, forming multiple rows of guide jetties on the lower surface of the opening window facing the head, and positioning the coil bobbin of the inserted head inside the upper wall of the opening window. It is characterized by the formation of multiple rows of positioning jetties.

[0007]

[Action]

 Based on such a configuration, according to the present invention, the protrusion and the jetty formed in the inner cavity of the case body into which the head portion is inserted are both the guide and the positioning of the inserted head portion. When inserting the head part into the case body, the side surface of the front core is guided by the ridges formed on both inner wall surfaces of the lumen chamber, and the insertion is easily performed. When the front part faces the opening window, it is accurately positioned by the guide ridge on one side and the jetty, and the coil bobbin of the head abuts the positioning jetty formed inside the upper wall of the opening window. Assembling of the head is easy, such as accurate positioning.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a rear view showing a case structure body of an erasing head according to the present invention, FIG. 2 is a front view showing an assembled state of the erasing head, and FIGS. 3A to 3C are case bodies according to the present invention. FIG.

In the figure, reference numeral 1 is a case structure main body of an erasing head according to the present invention. Inside the case main body 1, an inner cavity 2 into which a head portion is inserted from the back surface is formed, and An opening window portion 3 facing the front portion of the inserted head portion is formed on the front surface. Further, mounting bosses 4 for fixing to the device body are integrally provided on both side surfaces of the case body 1.

On the other hand, a plurality of rows of guide ridges 5 and 6 are formed on both inner wall surfaces of the inner cavity 2 formed in the case main body 1, and one of these ridges is formed. 5 extends to the side wall of the opening window 3. Further, a plurality of rows of guide jetties 7 are formed on the lower surface of the opening window portion 3 facing the head portion. Further, inside the upper wall surface of the opening window portion 3, the coil bobbin of the inserted head portion is attached. A plurality of rows of positioning jetties 8 are formed for positioning.

The ridges 5 and 6 and the ridges 7 and 8 formed in the lumen chamber 2 of the case body 1 guide and position the head portion to which any of them is inserted. As shown in Fig. 6, when the head portion 10 is inserted into the case body 1, the side surface of the front core is guided by the projections 5 and 6 formed on the inner wall surfaces of the inner cavity chamber 2 to facilitate the insertion. When the front portion of the head portion 10 faces the opening window portion 3, it is accurately positioned by the guide ridge 5a on one side and the jetty 7, and the coil bobbin of the head portion 10 is placed above the opening window portion 3. It hits the positioning jetty 8 formed inside the wall surface and is positioned accurately.

The head portion 10 in which the coil bobbin, the center core, the front core, and the like are assembled as described above is inserted into the inner cavity 2 of the case body 1, and further, a resin backing is provided around the head portion 10. After the molding, the erasing head is formed by polishing the tape running surface to a mirror surface.

[0014]

[Effect of device]

 As described above in detail, in the case structure of the erasing head according to the present invention, the inside of the case body forms the lumen chamber into which the head part is inserted and the front part of the head part faces the front surface. An opening window is formed, and a plurality of rows of guide ridges are formed on both inner wall surfaces of the lumen chamber, and one of these guide ridges extends to the side wall of the opening window. Then, multiple rows of guide jetties were formed on the lower surface of the opening window facing the head, and multiple rows of positioning jetties for positioning the coil bobbins of the head were formed inside the upper wall surface of the opening window. Therefore, it is easy to assemble the head portion to the case body, and the shapes of the center core, the front core, and the like that form the head portion are simplified, and the cost of the erasing head can be reduced.

[Brief description of drawings]

FIG. 1 is a rear view showing a case structure body of an erasing head according to the present invention.

FIG. 2 is a front view showing an assembled state of an erasing head according to the present invention.

3A to 3C are cross-sectional views of a case body according to the present invention.

FIG. 4 is an exploded perspective view showing a case structure of a conventional erasing head.

FIG. 5 is an exploded perspective view showing a case structure of another conventional erasing head.

FIG. 6 is a perspective view showing an assembled state of an erasing head having a conventional structure.

7A and 7B are perspective views showing a case structure of another conventional erasing head.

[Explanation of symbols]

 1 Case Main Body 2 Luminous Chamber 3 Opening Window 5 Guide Ridge 6 Guide Ridge 7 Guide Ridge 8 Positioning Ridge 10 Head

[Procedure amendment]

[Submission date] December 29, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a rear view showing a case structure body of an erasing head according to the present invention.

FIG. 2 is a front view showing an assembled state of an erasing head according to the present invention.

3A to 3C are cross-sectional views of a case body according to the present invention.

FIG. 4 is an exploded perspective view showing the structure of a conventional erasing head.

FIG. 5 is an exploded perspective view showing the structure of another conventional erasing head.

FIG. 6 is a perspective view showing an assembled state of an erasing head having a conventional structure.

FIG. 7 is an exploded perspective view showing the structure of another conventional erasing head.

8 is a perspective view showing an assembled state of another erase head according to the conventional structure shown in FIG.

[Explanation of reference numerals] 1 case main body 2 lumen chamber 3 opening window 5 guide ridge 6 guide ridge 7 guide ridge 8 positioning ridge 10 head

Claims (1)

[Scope of utility model registration request] 1. An inside cavity of a case body constituting an erasing head is formed with a lumen chamber into which a head portion is inserted from the back surface, and an opening window portion facing the front portion of the head portion is formed on the front surface,
A plurality of rows of guide ridges are formed on both inner wall surfaces of the lumen chamber, and one of the guide ridges is extended to the side wall of the opening window to form an opening window facing the head. A plurality of rows of guide jetties are formed on the lower surface of the portion, and a plurality of rows of positioning jetties for positioning the coil bobbin of the inserted head portion are formed inside the upper wall surface of the opening window. Erase head case structure.