JP4107070B2 - Magnetic recording / reproducing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a magnetic recording / reproducing apparatus that can be used in a video tape recorder or the like.
[0002]
[Prior art]
A conventional magnetic recording / reproducing apparatus has a configuration in which a holder for positioning and holding a flexible printed circuit board (hereinafter referred to as a flexible P board) for transmitting a recording / reproducing signal drawn from a rotary transformer unit is held by a chassis. Yes. (For example, refer to Patent Document 1).
[0003]
A conventional magnetic recording / reproducing apparatus will be described below.
[0004]
FIG. 15 is a rear side view of a magnetic recording / reproducing apparatus used in a conventional video tape recorder, and FIG. 16 is a sectional view taken along line Y1-Y2 in FIG. 15 and 16, 1 is a fixed drum for guiding a magnetic tape (not shown), 2 is a rotation that rotates coaxially with respect to the fixed drum 1 and has at least a pair of magnetic heads (not shown). A drum 3 is provided between the fixed drum 1 and the rotary drum 2 and is a flexible P plate drawn out from a rotary transformer unit (not shown) that transmits a recording signal to the magnetic tape or a reproduction signal from the magnetic tape. Is a rotary head unit composed of a fixed drum 1, a rotary drum 2 and a flexible P plate 3, 5 is a holder for positioning and holding the flexible P plate 3 and is held at the rear of a chassis 6, which will be described later, 6 is a rotary head unit 4 and A chassis for holding the holder 5, 7 is a circuit board located under the chassis 6, 8 is a spacer that holds the circuit board 7 and serves as a base for the chassis 6, 9 A connector in which the Rexable P board 3 is inserted and soldered to the circuit board 7. The connector is electrically connected to the electric circuit of the circuit board 7, and the flexible P board 3 is inserted between the flexible P board 3 and the flexible P board 3. The electrical connection is made.
[0005]
The operation of the conventional magnetic recording / reproducing apparatus configured as described above will be described below.
[0006]
When the rotary drum 2 including the magnetic head (not shown) rotates, the magnetic circuit is magnetically routed by the circuit board 7 → connector 9 → flexible P plate 3 → rotary transformer unit (not shown) → magnetic head (not shown). Information such as video and audio is recorded on a tape (not shown). In addition, recorded information can be reproduced by the reverse path described above with a recorded magnetic tape (not shown).
[0007]
Since the conventional method for assembling the magnetic recording / reproducing apparatus is described in Patent Document 1, detailed description thereof is omitted.
[0008]
[Patent Document 1]
Japanese Patent No. 3144413 (5th page, FIG. 2)
[0009]
[Problems to be solved by the invention]
However, in the above-described conventional configuration, as shown in FIG. 16, the holder 5 for positioning and holding the flexible P plate 3 is held by the rear portion 6a of the chassis 6, so that the connector 9 into which the flexible P plate 3 is inserted is At least the rear part 6a of the chassis 6 is located outside, and the circuit board 7 has to secure a space for soldering the connector 9 outside the rear part 6a of the chassis 6 by the dimension L1. There is a problem that miniaturization of the magnetic recording / reproducing apparatus is hindered.
[0010]
In order to arrange the connector 9 below the fixed drum 1 for the purpose of reducing the size of the circuit board 7, the holder 5 for positioning and holding the flexible P plate 3 must be held by the fixed drum 1. At this time, it is necessary to securely insert the flexible P plate 3 into the connector 9, and in order to absorb the relative displacement between the flexible P plate 3 and the connector 9, the degree of freedom of position of the holder 5 with respect to the fixed drum 1 is increased. It was necessary to secure.
[0011]
The present invention solves the above-described conventional problems, and absorbs the relative displacement between the flexible P plate and the connector and allows the flexible P plate to be securely inserted into the connector. It is an object of the present invention to provide a magnetic recording / reproducing apparatus that is disposed in the lower part and that can reduce the size of a circuit board and the magnetic recording / reproducing apparatus.
[0012]
[Means for Solving the Problems]
In order to achieve this object, a magnetic recording / reproducing apparatus according to the present invention includes a fixed drum for guiding a magnetic tape, a rotating drum coaxially rotated with respect to the fixed drum, and having at least a pair of magnetic heads. A rotary head unit composed of a flexible P plate that transmits a recording signal of the recording medium or a reproduction signal from the magnetic tape, a holder that is held by the fixed drum and that positions and holds the flexible P plate, and holds the rotary head unit The chassis comprises a chassis, a circuit board located at the lower part of the chassis, and a connector located at the lower part of the fixed drum and the flexible P plate inserted therein and soldered to the circuit board. A retaining portion of the holder that is provided with a hole and engages with an engagement hole of an arbitrary shape provided in the fixed drum has elasticity. It has a configuration that consists of the positioning unit engaging claw portion.
[0013]
With this configuration, even if the relative positions of the flexible P plate and the connector are displaced, the flexible P plate can be reliably inserted into the connector, so that the connector for inserting the flexible P plate can be disposed below the fixed drum. It is possible to obtain a magnetic recording / reproducing apparatus that can reduce the size of the circuit board and the magnetic recording / reproducing apparatus.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, there is provided a fixed drum that guides a magnetic tape, a rotary drum that rotates coaxially with the fixed drum and has at least a pair of magnetic heads, a recording signal to the magnetic tape, Alternatively, a rotary head unit composed of a flexible P plate that transmits a reproduction signal from a magnetic tape, a holder that is held by the fixed drum and that positions and holds the flexible P plate, a chassis that holds the rotary head unit, and A circuit board located at the lower part of the chassis, and a connector located at the lower part of the fixed drum and inserted into the flexible P plate and soldered to the circuit board, provided with an engagement hole of an arbitrary shape in the fixed drum, The locking portion of the holder that engages with an engagement hole of an arbitrary shape provided in the fixed drum is positioned with a locking claw portion having elasticity. The connector that inserts the flexible P plate can be fixed by securely inserting the flexible P plate into the connector even if the relative positions of the flexible P plate and the connector are displaced. It can be arranged below the drum, and this has the effect that the circuit board can be downsized and the magnetic recording / reproducing apparatus can be downsized.
[0015]
According to a second aspect of the present invention, there is provided a radial gap in the engagement hole of the fixed drum and the locking claw portion of the holding means, and the holding means that contacts the fixed drum so that the gap can be seen from the outside. This is a configuration in which a notch is provided in the base portion of the locking portion of this, and after mounting the holder to the fixed drum, if parts other than the holder (such as the fixed drum) cannot be used due to defects such as scratches, etc. In order to reuse the holder, the holder can be easily detached from the fixed drum.
[0016]
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[0017]
(Embodiment 1)
FIG. 1 is a rear side view of the magnetic recording / reproducing apparatus according to Embodiment 1 of the present invention. In FIG. 1, the rotary head unit and the chassis are partly cut out for the sake of clarity. FIG. 2 is an exploded perspective view of the rotary head unit, the holder, the connector, and the circuit board according to the embodiment, and the drawing of the circuit board and the chassis is omitted for easy understanding. 3 to 5 are cross-sectional views showing the vicinity of the engagement holes for easy understanding of the explanation in the side view of the main part showing the engagement operation of the fixed drum and the holder. 6 to 9 are side views showing the engaging operation between the rotary head unit engaged with the holder and the connector, and FIG. 10 is a sectional view showing the engaging state between the flexible P plate and the connector. It is a cross section of Y4 part. 11 to 13 are bottom views of the main part of the fixed drum viewed from the direction of arrow Y5 in FIG. FIG. 14 is a perspective view showing the overall configuration of the holder.
[0018]
In the figure, reference numeral 11 denotes a fixed drum which has a pair of engagement holes 11a and guides a magnetic tape (not shown). The engagement holes 11a are provided with tapers 11b at the upper and lower ends. In this embodiment, since the locking portion 15a is inserted into the engagement hole 11a from below, it is only necessary to provide the taper 11b at least at the lower end of the engagement hole 11a. 12 is a rotating drum that rotates coaxially with respect to the fixed drum 11 and has at least a pair of magnetic heads (not shown), and 13 is provided between the fixed drum 11 and the rotating drum 12 to record signals on the magnetic tape, or A flexible P plate 14, which is drawn from a rotary transformer unit (not shown) for transmitting a reproduction signal from the magnetic tape, is a rotary head unit including a fixed drum 11, a rotary drum 12, and a flexible P plate 13.
[0019]
Reference numeral 15 denotes a holder that is a holding means that positions and holds the flexible P plate 13 and has a pair of locking portions 15a that engage with the engagement holes 11a of the fixed drum 11, and the overall configuration is as shown in FIG. Each of the pair of locking portions 15a includes a locking claw portion 15b and a positioning portion 15c each having elasticity. The locking claw portion 15b is provided with a protrusion 15d at the tip thereof so as to engage with the inside of the fixed drum 11 and a taper 15f so as to be guided by the engagement hole 11a. The positioning portion 15c is provided with a taper 15g at the tip thereof so as to be guided by the engagement hole 11a and a thin portion 15e so as to be easily elastically deformed when engaged with the engagement hole 11a. In addition, a plurality of tapers 15 i are provided at the lower end of the holder 15 so as to be well guided when connected to the connector 19.
[0020]
Reference numeral 16 denotes a chassis that holds the rotary head unit 14. The chassis 16 is provided with a reel base for rotating the reel of the tape cassette and posts for running the tape in addition to the rotary head unit 14. Reference numeral 16a denotes a rear portion of the chassis 16, and reference numeral 16b denotes a positioning hole provided in the chassis 16 for positioning the chassis 16 by inserting a positioning pin 18a.
[0021]
Reference numeral 17 denotes a circuit board that is located below the chassis 16 and has various electric circuits. A hole 17 a is provided at a position corresponding to the positioning pin 18 a of the spacer 18. Reference numeral 19 denotes a connector located under the fixed drum 11 and having the flexible P plate 13 inserted therein and soldered to the circuit board 17. Reference numeral 18a denotes a front end portion of the spacer 18, which is a positioning pin for positioning the chassis 16, and has a tapered shape at the front end thereof so as to be surely inserted into the positioning hole 16b. Reference numeral 18 denotes a spacer for holding the circuit board 17 and the chassis 16.
[0022]
The operation of the magnetic recording / reproducing apparatus of the present embodiment configured as described above will be described.
[0023]
First, when the rotary drum 12 including the magnetic head (not shown) rotates, a path of circuit board 17 → connector 19 → flexible P plate 13 → rotation transformer unit (not shown) → magnetic head (not shown). Thus, information such as video / audio is recorded on a magnetic tape (not shown). Further, in the case of a recorded magnetic tape (not shown), the recorded information can be reproduced through the reverse path described above, as in the conventional example.
[0024]
Next, a method for assembling the apparatus will be described.
[0025]
First, as shown in FIG. 2, a flexible P plate 13 having one end electrically connected to a rotary transformer unit (not shown) in the rotary head unit 14 and the other end drawn from the lower surface of the fixed drum 11 is provided. In the rotary head unit 14, the other end of the flexible P plate 13 is held at a predetermined position of the holder 15 as indicated by an arrow A. The holding of the flexible P plate 13 in the holder 15 is performed in the same manner as in the prior art.
[0026]
Next, as shown by an arrow B in FIG. 2, engaging portions 15 a provided at two places on the upper surface of the holder 15 are engaged with the lower surface of the fixed drum 11. The engaging operation will be described in detail with reference to FIGS.
[0027]
3 shows a state before the fixed drum 11 and the locking portion 15a of the holder 15 are engaged, FIG. 4 shows a state in the middle of engagement, and FIG. 5 shows a state after the engagement. First, as shown in FIG. 3, the holder 15 is moved in the direction of arrow C from the state where the engagement hole 11a provided on the lower surface of the fixed drum 11 and the locking portion 15a are separated from each other. Next, as shown in FIG. 4, the locking claw portion 15b constituting the locking portion 15a and the distal end of the positioning portion 15c are inserted into the engagement hole 11a. At this time, the locking claw portion 15b is guided to the engagement hole 11a by the taper 11b provided at least at the lower end of the engagement hole 11a and the taper 15f provided at the tip of the locking claw portion 15b. It is inserted while elastically deforming. Next, as shown in FIG. 5, when the locking portion 15a is inserted to a predetermined position of the engaging hole 11a, the elastic deformation of the locking portion 15a is restored, and the protrusion 15d provided at the tip of the locking claw portion 15b. Engages with the inside of the fixed drum 11. At the same time, the holder 15 is positioned by the positioning portion 15c. In this embodiment, since the holder 15 is provided with the two locking portions 15a, the holder 15 is fixed to the fixed drum 11 by engaging the two locking portions 15a with the corresponding engagement holes 11a. Can be held on the lower surface of the plate.
[0028]
FIG. 11 is a view of the state of the engaging hole 11a and the locking portion 15a after being viewed from the direction of the arrow Y5 in FIG. As shown in the figure, when the locking claw portion 15b is viewed from the lower surface side (or the upper surface side), the portion excluding the protrusion 15d has a substantially arc shape and is provided at the tip of the locking claw portion 15b. The taper 15f also has a substantially arc shape. Similarly, when viewed from the lower surface side (or the upper surface side), the positioning portion 15c has a substantially arc shape, and the taper 15g provided at the tip of the positioning portion 15c also has a substantially arc shape. The thin portion 15e has an arc-shaped portion and a straight portion.
[0029]
In the above description, the engaging claw portion 15b is elastically deformed when the engaging portion 15a is engaged with the engaging hole 11a. However, the positioning portion 15c is provided with a thin portion 15e. When the engaging portion 15a and the engaging hole 11a are engaged, the positioning portion 15c is also elastically deformed, so that the holder 15 is engaged with the fixed drum 11 in a state displaced in the left direction in the figure. Even if it tries to make it, it will become easy to engage by the elastic deformation of the taper 15g provided in the front-end | tip of the positioning part 15c, and the thin part 15e.
[0030]
Next, the rotary head unit 14 holding the holder 15 on the fixed drum 11 is attached to a predetermined position on the chassis 16 by a fixing means such as a screw.
[0031]
Next, the positioning pin 18 a is inserted into the hole 17 a provided in the circuit board 17, and the circuit board 17 is positioned at a predetermined position of the spacer 18. The hole 17 a provided in the circuit board 17 has a dimension that can be positioned by the spacer 18. The positioned circuit board 17 is fixed to a housing (not shown) by fixing means such as screws. A connector 19 is fixed to a predetermined position of the circuit board 17 by soldering.
[0032]
Next, the chassis 16 to which the rotary head unit 14 is attached is attached to the circuit board 17. At that time, the positioning pin 18 a is inserted into the positioning hole 16 b provided in the chassis 16, and the spacer 18 is positioned at a predetermined position (at least above the circuit board 17). The positioning hole 16b provided in the chassis 16 is set to a size that allows at least the positioning pin 18a to be inserted. The tip of the positioning pin 18a is provided with a tapered shape as shown in the figure so that it can be surely inserted into the positioning hole 16b of the chassis 16.
[0033]
When the chassis 16 is attached to the circuit board 17, the connector 19 is disposed at a position corresponding to the holder 15 on the circuit board 17. When the chassis 16 is positioned by the positioning pins 18a, it is shown by an arrow D in FIG. The holder 15 and the connector 19 are engaged with each other, and the flexible P plate 13 held by the holder 15 is electrically connected to the terminal portion of the connector 19. Here, a taper 15 i (see FIG. 14) is provided at the lower end of the holder 15 so as to be reliably engaged with the connector 19.
[0034]
Here, the movement of the holder 15 when the chassis 16 is attached to the circuit board 17 will be described in detail with reference to FIGS.
[0035]
6 is a side view showing a state before the rotary head unit 14 and the connector 19 engaged with the holder 15 are engaged, FIG. 7 is a state in the middle of engagement, and FIG. FIG. 9 shows a state after the position 15 is displaced by the connector 19, and FIG. 6 to 9 are drawn without the configuration of the chassis or the like for easy understanding.
[0036]
Since the holder 15 is disposed on the lower surface of the rotary head unit 14 and the rotary head unit 14 is fixed to a chassis (not shown), when the holder 15 is engaged with the connector 19, the holder 15 is positioned above the rotary head unit 14. From the side, even if the positions of the holder 15 and the connector 19 are positioned to some extent by the engagement between the chassis and the positioning pins as described above with reference to FIG. 1, it is difficult to grasp the accurate positions. Therefore, as shown in FIG. 6, before the rotary head unit 14 and the holder 15 are engaged, there are many cases in which the positions in the left and right and front and rear directions are deviated from each other (for example, dimension d in FIG. 6).
[0037]
First, from the state of FIG. 6, the rotary head unit 14 engaged with the holder 15 is moved in the direction of arrow E, and the taper 15 i provided at the lower end of the holder 15 is changed to the upper end of the connector 19 as shown in FIG. Abut.
[0038]
When the rotary head unit 14 is further moved in the direction of arrow G, the holder 15 is moved and guided in the direction of arrow F so as to be engaged with the connector 19 by the taper 15i, resulting in the state of FIG. At this time, as shown in FIG. 7 (b), since the locking claw portion 15b and the positioning portion 15c of the holder 15 have elasticity, when the holder 15 moves in the direction of the arrow F, When the claw portion 15b abuts on the inner surface of the engagement hole 11a and further moves in the direction of arrow F, it is elastically deformed in the direction of arrow I as shown in FIG. Thereby, the relative positional deviation between the holder 15 and the connector 19 is absorbed. In FIG. 7B, the locking claw portion 15b is elastically deformed. However, even if the holder 15 moves in the direction opposite to the arrow F, the positioning portion 15c contacts the inner surface of the engagement hole 11a. By the elastic deformation, the relative positional deviation between the holder 15 and the connector 19 can be similarly absorbed.
[0039]
Even if the holder 15 is displaced in the arrow F direction with respect to the fixed drum 11, the position of the rotary head unit 14 including the fixed drum 11 with respect to the chassis 16 does not change. If the position of the rotary head unit 14 changes, it adversely affects the path of the tape wound around the rotary head unit 14, so the lateral displacement of the holder 15 is within the range where the position of the rotary head unit 14 does not change. It is set in consideration of the mounting error as shown in the dimension D of FIG.
[0040]
When the rotary head unit 14 is further moved in the arrow H direction from the state shown in FIG. 8, the state shown in FIG. 9 is obtained, and the flexible P plate 13 and connector held by the holder 15 while the holder 15 and connector 19 are engaged. The terminal in 19 is electrically connected. FIG. 10 is a cross-sectional view of the engagement completion state of the holder 15 and the flexible P plate 13 and the connector 19 as viewed from the side, and is a cross-section of the Y3-Y4 portion of FIG.
[0041]
Thus, the fixed drum 11 is provided with a pair of engagement holes 11a, and the holder 15 is provided with a pair of elastic locking portions 15a, so that the fixed drum is composed of the engagement holes 11a and the locking claw portions 15b. 11, the holder 15 is held, and the position of the holder 15 is regulated with respect to the fixed drum 11 by the engagement hole 11a and the positioning portion 15c. And since the nail | claw part 15b for latching and the positioning part 15c have elasticity, even if the relative positions of the flexible P board 13 and the connector 19 shift | deviate, the holder 15 moves with respect to the fixed drum 11 with this elasticity. It is possible to absorb the relative displacement between the flexible P plate 13 and the connector 19, and the flexible P plate 13 can be reliably inserted into the connector 19.
[0042]
As described above, according to the present embodiment, the engaging portion 15a of the holder 15 is configured to be elastically deformable, so that the holder 15 and the flexible P plate 13 and the connector 19 are relative to each other when the apparatus is assembled. Even if the position is shifted, the flexible P plate 13 can be reliably inserted into the connector 19.
[0043]
Therefore, the connector 19 into which the flexible P plate 13 is inserted can be arranged below the fixed drum 11, and thus there is no need for a space for arranging the connector 19 outside the chassis 16 on the circuit board 17. Thus, it is possible to obtain a magnetic recording / reproducing apparatus that can reduce the size of the apparatus and further reduce the size of the apparatus.
[0044]
(Embodiment 2)
FIG. 12 is a bottom view showing a configuration in which the engaging portion between the fixed drum and the holder is partially cut away in the magnetic recording / reproducing apparatus of the present invention. In the figure, the same components as those in the first embodiment are given the same numbers, and detailed description thereof is omitted. 15 j is a notch provided in the holder 15, and 11 a-1 is a visible part that is a part of the engagement hole 11 a that is visible by the notch 15 j.
[0045]
The operation of the embodiment configured as described above will be described below.
[0046]
After the holder 15 is mounted on the fixed drum 11 in the manner described in the first embodiment, if a defect such as a scratch is found on the fixed drum 11, the rotary head unit 14 including the fixed drum 11 must be removed from the apparatus. The procedure is performed in the reverse procedure of the assembly procedure described in the first embodiment. Finally, the holder 15 is engaged with the fixed drum 11. In the configuration of the first embodiment, when the holder 15 is engaged with the fixed drum 11, the locking claw portion 15b is not visible from the outside, and therefore the holder 15 is removed from the fixed drum 11. Have difficulty.
[0047]
Therefore, in the present embodiment, as shown in FIG. 12, a visible portion 11a in which a notch portion 15j is provided in a part of the locking portion base base portion 15h so that a part of the engaging hole 11a of the fixed drum 11 is visible. -1 was provided.
[0048]
Then, by inserting a minus driver-like jig into the visible portion 11a-1 and pulling out the entire locking portion 15a from the engaging hole 11a while tilting the locking claw portion 15b toward the positioning portion 15c, the holder 15 can be easily removed. Can be removed from the fixed drum, the fixed drum in which a defect has occurred can be replaced with a fixed drum having no defect, and the holder 15 removed as described above can be reused.
[0049]
In the present embodiment, as shown in FIG. 12, the notch portion 15j is provided in the locking portion base base portion 15h in order to make a part of the engagement hole 11a visible, but the notch is not provided. Instead of providing, a configuration in which a part of the engagement hole 11a is visible in advance may be used as shown in FIG.
[0050]
As described above, according to the present embodiment, after the holder 15 is mounted on the fixed drum 11, even if there is a defective part in the fixed drum 11, a part of the locking base base portion 15 h of the holder 15 is notched. Since a part of the engagement hole 11a is made visible, a jig such as a minus driver can be inserted into the visible part 11a-1, and the holder 15 can be easily detached from the fixed drum 11 and fixed. After replacing the drum, the holder can be reused.
[0051]
【The invention's effect】
As described above, the present invention provides a holder that can be attached to and detached from the fixed drum, and can securely insert the flexible P plate held by the holder into the connector disposed at the bottom of the fixed drum, thereby realizing a reduction in the size of the circuit board. Furthermore, an excellent effect that the apparatus can be reduced in size can be obtained.
[0052]
Further, the holder can be easily removed from the fixed drum, and the holder can be reused after the fixed drum is replaced.
[Brief description of the drawings]
FIG. 1 is a rear side view of a magnetic recording / reproducing apparatus according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of a rotary head unit, a holder, a connector, and a circuit board according to the first embodiment. FIG. 4 is a side view of the main part showing the engaging operation of the fixed drum and the holder in the embodiment. FIG. 4 is a side view of the main part showing the engaging operation of the fixed drum and the holder in the embodiment. FIG. 6 is a side view showing the engaging operation between the rotary head unit engaged with the holder and the connector according to the embodiment. FIG. FIG. 8B is a side view showing the engagement operation of the rotary head unit engaged with the holder in the form and the connector. FIG. 8B is a cross-sectional side view of the main part showing the elastic deformation state of the locking claw part in the embodiment. The holder in the embodiment is engaged FIG. 9 is a side view showing the engagement operation between the rotary head unit and the connector. FIG. 9 is a side view showing the engagement operation between the rotary head unit and the connector engaged with the holder in the embodiment. FIG. 11 is a cross-sectional view taken along line Y3-Y4 of FIG. 1 in the embodiment. FIG. 11 is a bottom view of the main part of the fixed drum as viewed from the direction of arrow Y5 in FIG. FIG. 13 is a bottom view of the main part of the fixed drum as viewed from the direction of the arrow Y5 in FIG. 1 in the embodiment. FIG. 14 is an overall configuration of the holder according to the embodiment. FIG. 15 is a rear side view of a conventional magnetic recording / reproducing apparatus. FIG. 16 is a cross-sectional view taken along line Y1-Y2 of FIG.
DESCRIPTION OF SYMBOLS 11 Fixed drum 11a Engagement hole 11a-1 Visible part 12 of engagement hole 11a Rotating drum 13 Flexible P board 14 Rotating head unit 15 Holder 15a Locking part 15b Locking claw part 15c Positioning part 15d Locking part base base part 16 Chassis 17 Circuit board 18 Spacer 19 Connector

Claims (2)

A fixed drum that guides the magnetic tape, a rotating drum that rotates coaxially with the fixed drum and has at least a pair of magnetic heads, and a flexible print that transmits a recording signal to the magnetic tape or a reproduction signal from the magnetic tape A rotary head unit composed of a board, holding means for positioning and holding the flexible printed circuit board held by the fixed drum, a chassis for holding the rotary head unit, a circuit board located at a lower part of the chassis, and The flexible printed circuit board is inserted in the lower portion of the fixed drum and the connector is soldered to the circuit board. The fixed drum is provided with an arbitrary shape engagement hole, and the arbitrary shape engagement is provided on the fixed drum. The locking portion of the holding means that engages with the hole includes a locking claw portion and a positioning portion having elasticity. Magnetic recording and reproducing apparatus which is characterized in that configuration. A clearance in the radial direction is provided between the engaging hole of the fixed drum and the locking claw portion of the holding means, and a notch is provided in the base portion of the locking portion of the holding means that contacts the fixed drum so that the gap can be seen from the outside. The magnetic recording / reproducing apparatus according to claim 1.

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