JP2000040275A - Sliding mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sliding mechanism having a simple constitution, wherein a smooth sliding movement is realized and the cost of components are low. SOLUTION: This sliding mechanism is used as a mechanism for supporting a head board 2 supporting the magnetic head 3 of a tape recorder so as to be slid with respect to a base plate 1. Specifically, the head board 2 has two standing bent parts 2b and 2c along a sliding direction, the standing bent parts are inserted into guiding grooves 1a and 1b provided in the base plate 1 and attached, and then supported by being held between projections 1b and 1c and projections 1e and 1f disposed oppositely to the two guiding grooves 1a and 1d. Accordingly, even when burrs are left in the standing bent parts by press- molding, a smooth movement is realized without the abutment of the burrs on the guiding grooves 1a and 1d.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide mechanism composed of two members which are relatively movable in a predetermined direction while being engaged with each other.

[0002]

2. Description of the Related Art For example, there is a slide mechanism shown in a perspective view of FIG. 8 as an example of a conventional slide mechanism incorporated in a small electronic device such as a tape recorder, a printer, a magneto-optical disk, or the like. The slide mechanism is a main plate 1
01 and a slide plate 102 that slides in the direction D with respect to the main plate 101.
Is provided with a guide groove 101a along the direction D, and a slide plate 102 is provided with a slide pin 102a that is slidably fitted into and engaged with the guide groove 101a. Further, another guide groove and a slide pin having the same shape as in FIG. 8 are arranged in the slide direction, and constitute a set of slide mechanisms.

FIG. 9 is a sectional view taken along the line GG 'of FIG. 8, showing a state in which the slide pin 102a is fitted into the guide groove 101a. The slide pin 102a is generally formed by fixing another component to the slide plate 102 by caulking or the like. However, in such a configuration, the slide pin is a separate member, which is disadvantageous in manufacturing cost. In order to solve the problem, there is a structure in which a press drawing shown in a cross-sectional view of FIG. 10 or a slide plate 103 integrally formed with a slide pin by projection is applied.

[0004]

However, when the integrally formed slide pin 103a shown in FIG. 10 is provided,
It is difficult to make the height t of the slide pin 103a approximately equal to or greater than the thickness of the slide plate, and the amount of engagement with the slide groove in the thickness direction is insufficient, which causes a problem in durability.

Therefore, as shown in the cross-sectional views of the slide mechanism engaging portion shown in FIGS. 11A and 11B, the bent portion 105a of the slide plate 105 is inserted into the slide groove 104a of the base plate 104.
May be slidably engaged. FIG.
1A is a cross-sectional view of the slide engaging portion viewed from the sliding direction, and FIG.
It is H 'sectional drawing. In FIG. 11, the burrs of the slide engaging portion are particularly enlarged.

However, the slide mechanism shown in FIG.
Since the slide plate 105 is a pressed part, the burr portion 105b remains in the vertical bent portion 105a at the sliding portion with the slide groove 104a. Therefore, troubles such as catching and occurrence of abnormal sound at the time of sliding occur. As a countermeasure, plastic outsert can be considered, but it is disadvantageous in terms of cost.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has as its object to provide a low-cost slide mechanism which can smoothly slide and has a simple structure.

[0008]

According to a first aspect of the present invention, a slide mechanism includes a first member and a second member which engage with each other and are relatively movable in a predetermined direction. In the slide mechanism, an engagement portion is formed on the first member, and the length of the engagement portion in the predetermined direction is larger than a relative movement amount. Is formed with a projection that is in contact with the engaging portion of the first member from a direction orthogonal to the predetermined direction, and the projection has the first member positioned at one end in the predetermined direction. The position of the engagement portion with respect to the second member at the time, and the position of the engagement portion with respect to the second member when the first member is located at the other end in the predetermined direction. They are provided in overlapping places.

[0009] The slide mechanism according to claim 2 of the present invention,
A first which engages with each other and is relatively movable in a predetermined direction;
In the slide mechanism including the member of the above and the second member,
The first member is formed with an engaging portion that is bent upright, and the length of the engaging portion in the predetermined direction is larger than a relative movement amount. The member has an engagement hole extending in the predetermined direction into which the engagement portion of the first member is inserted, and the engagement portion protruding from a direction orthogonal to the predetermined direction of the engagement hole. A protrusion that contacts the second member when the first member is located at one end in the predetermined direction; and a protrusion that is formed in the predetermined direction. The position of the engaging portion with respect to the second member when the first member is located at the other end of the second member is provided at a location where the position overlaps.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view around a magnetic head of a tape recorder device incorporating a slide mechanism according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line AA ′ of FIG. 1 in an assembled state. FIG. FIG.
3 (A) and 3 (B) are cross-sectional views taken along the line BB 'in FIG. 2, wherein FIG. It shows a state in which it has moved to the end and a state in which it has moved to the pushing end. FIG. 4 shows FIG.
4 (A) and FIG. 4 (B).
Shows a cross-sectional view in the case where burrs at the standing bent portion are different in appearance. Note that FIGS. 3 and 4 described above and FIGS.
In FIG. 7, the burrs and punching of the bent portion are enlarged.

Around the magnetic head of the tape recorder, a ground plate 1 as a second member, a head substrate 2 as a first member slidably supported by the ground plate 1, and a head substrate 2 A magnetic head 3 attached to the
An operation button 4 and an urging spring (torsion spring) 5 for urging the head substrate 2 in the sliding direction D0 (release direction).
And are arranged.

The base plate 1 has guide grooves 1a and 1b, which are two long engagement holes extending along the direction D, and an opening 1
g, and a spring arm support 1h on which the arm 5a of the urging spring 5 is suspended. The guide groove 1
a, 1b are projections in a direction orthogonal to the sliding direction (D direction), and are opposed projections 1b, 1c and 1e, 1
f is disposed on its inner surface, and its projections 1b, 1c,
The tip portions 1e and 1f have a relatively small R (curvature radius) projection shape.

The head substrate 2 has an opening 1 in the base plate 1.
g, a rear end supporting portion 2a inserted below the main plate, an upwardly bent portion 2b which is a rear engaging portion provided on a side portion of the rear end supporting portion 2a, and a downward direction which is a front engaging portion. Of the rear end supporting portion 2a, the positioning protrusion 2e, and the biasing spring mounting portion 2.
f, a spring arm support 2g on which the arm 5b of the biasing spring 5 is suspended, and an operation button attachment 2h.

The head substrate 2 has two upright bent portions 2b and 2c inserted into the guide grooves 1a and 1d of the base plate 1 from below and from above, respectively, as shown in FIG. As shown in the cross-sectional view, it is assembled in a state where the tip portion penetrates the main plate 1. Therefore, the direction perpendicular to the direction D of the head substrate 2 is regulated with the upright bent portion 2b sandwiched between the protrusions 1b and 1c of the guide groove 1a as shown in FIG. Guide groove 1
It is regulated and supported while being sandwiched between the projections 1e and 1f of d. Then, the vertical direction of the head substrate 2 is positioned with respect to the base plate 1 while being sandwiched between the projections 2d and 2e. In this slide mechanism, the head substrate 2 is supported so as to be slidable in the direction D with respect to the main plate 1 in the above-described state.

The D of the bent portion 2b of the head substrate 2
The width B0 in the direction (strictly, the width excluding the burrs 2b0 and the sagging 2b1) is equal to the distance between the entire stroke T of the head substrate 2 and the range S overlapping with the sliding movement of the upright bent portion described later. It is larger than the dimension with the addition. The same applies to the width in the D direction of the other bent portion 2c.

Further, since the upright bent portion 2b is press-formed, burrs 2b0 and sagging 2 are provided at both ends in the width direction.
b1 remains. Therefore, in order to prevent the burrs and sagging from being in contact with and facing the respective projections due to the sliding movement, the arrangement positions of the projections 1b and 1c of the guide groove 1a are set as shown in FIG. Width B of bent portion 2b
Range where 0 part overlaps by slide movement (overlapping part)
It is located in S. The same applies to the positional relationship between the other standing bent portion 2c and the projections 1e and 1f.

By arranging the projections 1b and 1c as described above, the bent portion 2b of the head substrate 2 is moved from the projections 1b and 1c of the base plate 1 even if the head substrate 2 strokes by a predetermined stroke T. Do not deviate. further,
The burrs 2b0 and the sag 2b1 of the upright bent portion 2b do not interfere with the sliding movement due to contact with the projections 1b and 1c of the base plate 1, and there is no backlash.

Although a burr 2b2 remains at the tip of the upright bent portion 2b as shown in the sectional view of FIG. 4, the tip has a guide groove 1a of the base plate 1 as shown in the sectional view of FIG. Since it is at a position completely penetrated, it does not hinder slide movement.

Next, the operation of the slide mechanism of the first embodiment configured as described above will be described. In a stopped (non-recording / reproducing) state where the magnetic head 3 is retracted, the head substrate 2 is moved and held in the direction D0 by the biasing spring 5. Then, when the operation button 4 is pressed in the direction D1, the head substrate 2 is provided with the upright bent portions 2b and 2c, the protrusions 1b, 1c and 1e of the guide grooves 1a and 1d of the base plate 1.
While being guided by 1d, it slides as shown in FIG. The magnetic head 3 moves to an operation position where recording and reproduction can be performed. In this state, the head substrate 2 is held at the operating position by a lock mechanism (not shown). When switching to the stop state, the lock state of the lock mechanism is released by operating a stop button (not shown). The head substrate 2 is slid in the direction D0 by the urging force of the urging spring 5, and the magnetic head 3 is retracted to a stop (non-recording / reproducing) state.

According to the slide mechanism of the first embodiment, during the above-described sliding operation, the upright bent portions 2b and 2c of the head substrate 2 are moved by the projections 1b, 1c and 1e of the guide grooves 1a and 1d of the base plate 1. It is guided and slid in a state where the play held by 1d is extremely small. Moreover,
Burrs and sagging in the width direction and at the ends of the vertical bent portions 2b and 2c are not provided with the guide grooves 1a and 1d and the projections 1b, 1c and 1 of the base plate 1.
No contact with e and 1d. Therefore, a smooth and rattling slide operation can be obtained.

Further, the pressed head substrate 2 having the bent portions 2b and 2c can be used directly as a slide portion, and there is no need to apply guide pins or plastic outserts, thereby reducing cost and space. This is advantageous in terms of security. In addition, the upright bent portions 2b and 2c are sandwiched between the opposing projections 1b and 1c and the projections 1e and 1f of the main plate 1, and the guide groove portions other than the projections function as escape portions from the upright bent portion. The bending accuracy of the standing bends 2b and 2c does not affect the movement. Further, since the bent portions 2b and 2c penetrate the guide grooves 1a and 1d, the engagement state does not change even if the head substrate 2 moves up and down slightly.

The direction in which the burrs having the widths of the upright bent portions 2b and 2c and the burrs at the tips are not limited to the above-described directions. For example, as shown in FIG. The same structure can be adopted for the burr 2b3. The same applies to burrs on the width surface.

In the slide mechanism according to the above-described embodiment, the guide grooves 1a and 1d are provided on the base plate 1 and projections facing the inner surfaces thereof are provided.
b and 2c are provided, but conversely, a configuration is employed in which a standing bent portion is provided on the base plate 1 side and a guide groove and a projection facing the inner surface thereof are provided on the head substrate 2 side. Is also possible.

Further, the base plate 1 itself is made of a plastic material, or the guide grooves 1a, 1d of the base plate, or the opposing projections 1b, 1c or 1e, 1
f may be formed by plastic outsert.

Next, modifications of the shape of the guide groove of the base plate in the first embodiment will be described. First
In the guide groove of the modified example, as shown in a sectional view showing the state of engagement between the protrusion and the upright bent portion in FIG. 5, the protrusion 11b provided in the guide groove 11a of the base plate 1 with which the upright bent portion 2b is engaged.
Is flat. The protrusion 11b is similarly provided within a range S overlapping by sliding movement of the width of the standing bent portion 2b. According to this modification, the contact surface with the upright bent portion is wide, so that the durability is improved.

In the second modified example, as shown in a sectional view showing the state of engagement between the protrusion and the bent portion in FIG. 6, the guide groove on the side of the base plate 1 where the burr 2b0 is located in the guide groove 21a of the base plate 1. The protrusion 21b is provided only on the inner surface, and the inner surface of the guide groove on the opposite side is a straight surface having no protrusion. The projections 21b are similarly formed on the upright bent portions 2.
It is provided in the range S which overlaps with the sliding movement of the width b.

In the guide groove 21a of the present modified example, no projection is provided on the burr-free side of the upright bent portion 2b, and the groove width can be further reduced, which is effective in reducing the size of the apparatus. In this modification, the width of the guide groove 21a is the same as that of the upright bent portion 2b.
Although there is no gap in the thickness direction of the protrusion, the urging force in the direction of the protrusion 21b always acts on the standing bent portion 2b, and the slide mechanism having a structure in which the protrusion 21b is in contact with the protrusion 21b. Thus, the width of the guide groove 21a can be increased with a margin irrespective of the thickness of the bent portion 2b.

Next, a slide mechanism according to a second embodiment of the present invention will be described. The slide mechanism according to this embodiment is characterized in that there is a single bent portion, which is an engagement portion provided on a head substrate, and another configuration of the tape recorder device in which the slide mechanism is incorporated is shown in FIG. 1 is the same as that of the first embodiment shown in FIG.

FIG. 7 is a cross-sectional view showing a state in which the projections and the upright bent portions are engaged with each other in the slide mechanism according to this embodiment.
FIG. 7A shows a state in which the upright bent portion is at the center position of the guide groove, and FIG. 7B shows a state in which the upright bent portion is slid to the release end position and to the push-in end position. .

As shown in FIG. 7A, the guide groove 31a of the base plate 1, which is the second member, is provided along the sliding direction (D direction), and two sets of projections 31b opposing the guide groove inner surface. , 31c and 31d, 31e.
The first bent portion 32b of the head substrate, which is the first member, is fitted and fitted between the projections 31b and 31c and 31d and 31e, and has a width B0 'in the D direction of the bent portion 32b. , And the total relative slide movement amount T 'plus the length of a range S' overlapping by slide movement described later.

In order to prevent burrs or sagging of the upright bent portion from coming into contact with or facing the projections due to the sliding movement, as shown in FIG. 7B, the two sets of projections 31b and 3b are used.
1c and the protrusions 31d and 31e have a width B0 in the D direction of the upright bent portion 32b (strictly, a width of a portion excluding the burr portion 32b0).
Are positioned within a range S ′ overlapping by sliding movement.

According to the tape recorder having the slide mechanism of the second embodiment constructed as described above, the bent portion 32b stands on the head substrate as the slide mechanism.
And only one guide groove 31a for the base plate need to be provided, and the apparatus can be downsized. Similarly, the burr 32b0 and the sag 32b1 of the upright bent portion 32b come into contact with the projections 1b and 1c of the base plate 1 and do not hinder the slide movement, and the slide movement operation can be performed smoothly without rattling. can get.

In the slide mechanism of the above embodiment, two sets of a total of four projections are provided facing the guide groove 31a of the base plate, but two projections are provided on one side of the inner surface of the guide groove, and one projection is provided on the opposite side. A configuration in which three protrusions are provided may be employed. Also, a standing bent portion 32b is provided on the main plate side,
It is also possible to adopt a configuration in which guide grooves and projections are provided on the head substrate side.

The slide mechanism to which each of the above-described embodiments or the modified examples is applied can be incorporated into office equipment such as a printer device and a magneto-optical disk device in addition to the tape recorder device.

[0035]

As described above, according to the slide mechanism of the present invention, the first member is provided with the engagement portion, and the second member is provided with the projection which comes into contact with the engagement portion. The first member and the second member are relatively movable in a state of contact with each other, and a smooth and accurate sliding movement state can be achieved even when burrs or the like by press working remain in the engagement portion. Thus, it is possible to provide a slide mechanism that has a simple structure and low cost components.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view around a magnetic head of a tape recorder incorporating a slide mechanism according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA ′ in an assembled state of FIG. 1;

FIG. 3 is a cross-sectional view taken along the line BB ′ of FIG. 2, and FIG.
FIG. 3B shows a state in which the head substrate is at the center position of the slide movement, and FIG. 3B shows a state in which the head substrate has moved to the end in the slide release direction and the state in which the head substrate has moved to the end in the slide pushing direction.

FIG. 4 is a cross-sectional view taken along the line CC ′ of FIG. 3, and FIG. 4 (A) and FIG. 4 (B) are cross-sectional views in a case where burrs of a standing bent portion are different in appearance.

FIG. 5 is a cross-sectional view showing a state in which a protrusion and a bent portion are engaged in a first modification of the shape of the main plate guide groove of the slide mechanism according to the first embodiment;

FIG. 6 is a cross-sectional view showing a state in which a protrusion and a bent portion are engaged in a second modification of the shape of the main plate guide groove of the slide mechanism according to the first embodiment;

FIG. 7 is a cross-sectional view showing a state in which a protrusion and a bent portion are engaged with each other in the slide mechanism according to the second embodiment of the present invention;
FIG. 7A shows a state in which the upright bent portion is located at the center position of the guide groove, and FIG. 7B shows a state in which the upright bent portion has been slid to the release end position and to the push-in end position. .

FIG. 8 is an exploded perspective view showing a part of a conventional slide mechanism.

FIG. 9 is a sectional view taken along line GG ′ of FIG. 8;

FIG. 10 is a longitudinal sectional view of another slide pin applied to a conventional slide mechanism.

11A and 11B are longitudinal sectional views showing a sliding portion of another conventional sliding mechanism, wherein FIG. 11A is a sectional view as viewed from the sliding direction, and FIG. 11B is a sectional view of FIG. H-
H ′ sectional view.

[Explanation of symbols]

1... Ground plate (second member) 1a, 1d, 11a, 21a, 31a... Guide grooves (engaging holes) 1b, 1c, 1e, 1f, 11b, 11c, 21b, 3
1b, 31c, 31d, 31e Projection 2 Head substrate (first member) 2b, 2c, 32b Standing bent portion (engagement portion) S, S '... Overlapping range (overlapping portion) T, T ': relative movement amount D: slide direction (predetermined direction)

Claims (2)

[Claims] 1. A slide mechanism comprising a first member and a second member which are engaged with each other and are relatively movable in a predetermined direction, wherein the first member has an engagement portion. The engaging portion is formed such that the length of the engaging portion in the predetermined direction is larger than a relative movement amount. The second member has an engaging portion of the first member and the predetermined direction. A projection is formed that abuts from a direction perpendicular to
The protrusion has a position of the engagement portion with respect to the second member when the first member is located at one end in the predetermined direction, and a position at the other end in the predetermined direction. A slide mechanism provided at a position where the position of the engaging portion with respect to the second member when one member is located overlaps with the second member. 2. A slide mechanism comprising a first member and a second member which are engaged with each other and are relatively movable in a predetermined direction, wherein the first member is provided with a vertically bent engagement member. A joining portion is formed, and the length of the engaging portion in the predetermined direction is greater than a relative movement amount. The second member has an engaging portion of the first member. An engagement hole that extends in the predetermined direction into which is inserted, and a projection that projects from a direction orthogonal to the predetermined direction of the engagement hole and contacts the engagement portion are formed, and the projection is The position of the engagement portion with respect to the second member when the first member is located at one end of the predetermined direction, and the first member is located at the other end of the predetermined direction. The position of the engaging portion with respect to the second member when it is located is provided at a location where the position overlaps. Slide mechanism according to claim.