JPH11103180A - Slide rail and electronic equipment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slide rail composed of channels which can be surely fixed when they are drawn out, wherein sufficient fixing force can be realized without applying an unnecessarily large force. SOLUTION: A slide is of three-staged structure composed of an outer channel 11, an intermediate channel 12, and an inner channel 13. Retainers 14 and 15 are each interposed between the channels 11, 12, and 13, so as to rotatably support ball bearings 14a and 15a. Locking pawls 11a and 12a are provided to the upper sides of the channels 11 and 12 in the sliding direction, corresponding to the ball bearings 14a and 15a respectively. When the intermediate channel 12 or the inner channel 13 is drawn out, the ball bearing 14a or 15a goes over locking pawl 11a or 12a respectively one by one, so that a fixing force is applied to the channel 12 or 13 for preventing the extended channel 12 or 13 from returning to its initial position. The fixing force gradually becomes larger in accordance with the extent of the channels slide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide rail and an electronic apparatus, and more particularly, to a slide rail having a plurality of ball lock mechanisms provided in a pull-out direction so as to be able to reliably fix the slide rail when the drawer is pulled out. The present invention relates to an electronic device including a rail.

[0002]

2. Description of the Related Art For example, a terminal for a loan management system of a library is a unit for storing a card reader for collating customers and a printer for printing output results for maintenance and replenishment of printer paper in case of failure. The part is configured to be able to be pulled out. Generally, a slide rail is used for pulling out the unit in such a system.

FIG. 8 is a perspective view showing a configuration of a slide rail applied to a conventional terminal for a lending management system. FIG. 9 is a cross-sectional view taken along the line CC of FIG. As shown in these figures, a conventional slide rail includes an outer channel 51, an inter channel 52 fitted inside the outer channel 51 and slidable with respect to the outer channel 51, Inner channel 5 which fits inside 52 and is configured to be slidable with respect to inter channel 52.
And 3.

[0004] Between the outer channel 51 and the inter channel 52, a retainer 54 for rotatably supporting a plurality of ball bearings 54a at the top and bottom, respectively, is interposed. A retainer 55 that rotatably supports a plurality of ball bearings 55a at the top and bottom is interposed between the inter channel 52 and the inner channel 53. And ball bearings 54a, 55a
The inter-channel 52 and the inner channel 53 are smoothly slid by the action of, and the unit attached to the inner channel 53 can be pulled out and opened.

However, in such a terminal for a lending management system using a slide rail, when the unit is pulled out, the terminal becomes unstable. At this time, if an external force is applied by touching the unit, the unit may be closed, making it difficult to replenish the printer in the unit with paper. In order to avoid such difficulties, a person other than the one who is performing the sheet replenishing operation must hold down the unit so as not to be closed.

When such a slide rail is installed in an inclined state, the ball bearing 54a,
Since the frictional force generated between the rails by the action of 55a is small, the drawn-out unit part naturally closes. For this reason, it has been completely impossible for a single worker to perform operations such as replenishing the paper of the printer in the unit.

On the other hand, Japanese Unexamined Utility Model Publication No. 1-103093 discloses a locking claw (referred to as a ball lock portion in this publication) for pressing a ball bearing on an outer rail in order to prevent the rail from moving. A magnetic disk drive provided with a slide rail is disclosed. In other words, in this magnetic disk drive, when the unit for accommodating the magnetic head disk or the like (referred to as a mechanical unit deck in this publication) is pulled out, the slide rail does not move due to the force of the locking claw pressing the ball bearing. Is to try to fix it.

However, the slide rail disclosed in this publication does not consider the weight of the unit mounted on the slide rail. That is, if the force generated by the weight of the unit exceeds the force of the locking claw pressing the ball bearing when the slide rail is mounted obliquely, the unit may be closed. Therefore, when the weight of the unit changes depending on the members to be stored, the slide rail cannot exert a sufficient effect. On the other hand, it is conceivable to adjust the size and shape of the locking claw so as to increase the force for pressing the ball bearing, but in such a case, even if the weight of the unit is light, Unnecessarily strong force is required to open and close the unit.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the prior art. For example, regardless of the weight of a unit which is pulled out according to a slide rail, the unit can be fixed at the time of pulling out. An object of the present invention is to provide a slide rail that can be surely provided and that can obtain a sufficient fixing force without applying an unnecessarily large force, and an electronic apparatus including the slide rail.

[0010]

In order to achieve the above object, a slide rail according to a first aspect of the present invention is provided with an outer rail, fitted on the outer rail, and slidable with respect to the outer rail. A configured inner rail, a plurality of balls interposed between the outer rail and the inner rail, arranged along the sliding direction of the inner rail, and rotating a plurality of balls respectively engaging with the outer rail and the inner rail. And a support member for supporting the ball, the plurality of balls supported by the support member are arranged at substantially equal intervals along the sliding direction, and the outer rail is provided with the ball along the sliding direction. Arranged at substantially the same interval as the interval, a plurality of claw portions projecting toward the inner rail are formed at positions corresponding to the plurality of balls,
It is characterized by the following.

To achieve the above object, a slide rail according to a second aspect of the present invention comprises an outer rail and an inner rail fitted to the outer rail and slidable with respect to the outer rail. A support member interposed between the outer rail and the inner rail, arranged along the sliding direction of the inner rail, and rotatably supporting a plurality of balls engaged with the outer rail and the inner rail, respectively. Wherein the plurality of balls supported by the support member are arranged at substantially equal intervals along the sliding direction, and the inner rail is substantially the same as the distance between the balls along the sliding direction. A plurality of claw portions arranged at intervals and protruding toward the outer rail are formed at positions corresponding to the plurality of balls.

In the slide rail according to the first and second aspects, the plurality of claw portions are configured to be able to press the contacted ball.

In the slide rails according to the first and second aspects, when the fitted outer rail or inner rail is pulled out, the plurality of balls pass over the plurality of claws one by one. Touched. In other words, the more the outer rail or the inner rail is pulled, the more balls that go over the claw portion. Then, the force with which the claw portion presses the ball gradually increases. For this reason, the slide rail can be more strongly fixed according to the length of the drawer. Further, a sufficient fixing force can be obtained without pulling out the outer rail or the inner rail with an unnecessary strong force.

In the slide rail according to the first and second aspects, of the plurality of claw portions, the claw portion formed at the end closest to the fitting rail is the other claw. It is preferable that the ball be more strongly pressed than the portion.

In this case, when the outer rail or the inner rail is pulled out to the maximum, the fixing force of the rail is further increased. Therefore, it is fixed so that it is not easily pulled in by the external force applied by the fixing force when the sheet is fully extended.

The slide rails according to the first and second aspects may include a similar rail further outside the outer rail and a support member for holding a ball interposed therebetween. And such a configuration,
You can do it over many steps. That is, the present invention can be applied to any other type of slide rail of two or more types.

In order to achieve the above object, an electronic apparatus according to a third aspect of the present invention includes an outer rail, and an inner rail fitted to the outer rail and slidable with respect to the outer rail. And a support interposed between the outer rail and the inner rail, arranged along the sliding direction of the inner rail, and rotatably supporting a plurality of balls engaged with the outer rail and the inner rail, respectively. A slide rail having a member, and a unit unit for housing the electronic device, the unit being fixed to one of the outer rail and the inner rail and configured to be drawn out of a housing along the slide rail. The plurality of balls supported by the support member are disposed at substantially equal intervals along the sliding direction, and the outer rail is disposed in the sliding direction. Are arranged in substantially the same interval as the ball along, a plurality of claw portions protruding on the side of the inner rail is formed at a position corresponding to the plurality of balls, characterized in that.

To achieve the above object, an electronic apparatus according to a fourth aspect of the present invention comprises an outer rail and an inner rail fitted to the outer rail and slidable with respect to the outer rail. And a support interposed between the outer rail and the inner rail, arranged along the sliding direction of the inner rail, and rotatably supporting a plurality of balls engaged with the outer rail and the inner rail, respectively. A slide rail having a member, and a unit unit for housing the electronic device, the unit being fixed to one of the outer rail and the inner rail and configured to be drawn out of a housing along the slide rail. The plurality of balls supported by the support member are disposed at substantially equal intervals along the sliding direction, and the inner rail is disposed in the sliding direction. Are arranged in substantially the same interval as the ball along, a plurality of claw portions protruding on the side of the outer rails are formed at positions corresponding to the plurality of balls, characterized in that.

In the electronic device according to the third and fourth aspects, the unit may be configured so that the electronic device to be housed can be changed.

When the electronic devices housed in the unit are configured to be changeable, the weight of the entire unit naturally changes. Here, when the weight of the entire unit is heavy, a large fixing force can be obtained by pulling out the unit to the maximum and extending the slide rail to the maximum. On the other hand, when the weight of the entire unit is light, the slide rail may be extended so long as the force for pressing the ball by the claw is obtained so that a sufficient force is applied so that the unit is not shaken by an external force. For this reason, even if the unit portion is not pulled out with an unnecessarily large force, the unit portion can be fixed sufficiently.

[0021]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

[First Embodiment] FIG. 1 is a perspective view showing a terminal for a loan management system of a library to which a slide rail 1 according to this embodiment is attached. In this figure,
The state where the unit part 2 was pulled out is shown.

The terminal for a lending management system includes a unit 2 for storing a card reader 21 for collating customers and a printer 22 for printing output results. The unit 2 is configured to slide along the slide rail 1 and can be pulled out in a direction indicated by an arrow A. The printer 22 includes a cover 23 that can be opened and closed to remove the paper on which the jam has occurred. Note that the terminal for the lending management system is configured so that the equipment stored in the unit 2 can be changed according to the required function. That is, the weight of the unit 2 changes according to its configuration. The slide rail 1 is attached so as to be inclined downward toward the housing. When the unit 2 is opened, a downward force along the slide rail 1 is applied.

FIG. 2 is a perspective view showing a configuration of the slide rail 1 applied to the terminal for the lending management system of FIG. FIG. 3 is a sectional view taken along line AA of FIG. FIG. 4 is a sectional view taken along line BB of FIG.

As shown in these figures, the slide rail 1 is provided with an outer channel 11 and an inter channel 12 which is fitted inside the outer channel 11 and is slidable with respect to the outer channel 11.
And an inner channel 13 that fits inside the inter channel 12 and is slidable with respect to the inter channel 12. The length of the inter channel 12 is slightly shorter than the length of the outer channel 11, and the length of the inner channel 13 is slightly shorter than the length of the inter channel 12. Each of the channels 11, 12, and 13 is formed of a thin metal plate. Inner channel 13
Are attached to the unit 2 in the same manner as in the first embodiment.

Between the outer channel 11 and the inter channel 12, there are interposed retainers 14 for rotatably supporting a plurality of ball bearings 14a at upper and lower sides, respectively. A retainer 15 for rotatably supporting a plurality of ball bearings 15a above and below is interposed between the inter channel 12 and the inner channel 13. A plurality of ball bearings 14a and 15a are arranged at equal intervals along the sliding direction on both the upper and lower sides. Each channel 11, 12, 13 is bent up and down in a curved shape so as to engage with the ball bearings 14a, 15a, respectively.

The inter channel 12 and the inner channel 13 abut against retainers 14 and 15 at the time of maximum withdrawal, respectively, at the inner ends in the sliding direction, and the outer channel 11 and the inter channel 1 respectively.
2 are provided with stoppers 12a and 13a which do not come off.

Further, ball bearings 14a, 15b are provided at the outer ends in the sliding direction of the upper bent portions of the outer channel 11 and the inter channel 12, respectively.
Are provided with a plurality of locking claws 11a, 12a formed at regular intervals in the sliding direction at positions corresponding to the above. The size and shape of the locking claws 11a and 12a are such that the unit 2 can be easily pulled out and the unit 2
Is adjusted to an appropriate state where the inter channel 12 or the inner channel 13 can be fixed so as not to slide when it is pulled out. In particular, the outermost (left side in the figure) locking claw 11 of each channel
The sizes and shapes of the a and 12a are larger than other locking claws so that the inter channel 12 or the inner channel 13 does not slide back even if the unit part becomes considerably heavy, The force for fixing the ball bearings 14a and 15a is large.

In this management system terminal, when the unit 2 is pulled in the direction of arrow A in FIG. 1, first, the inner channel 13 starts to slide. The inner end of the inner channel 13 is the inter channel 1
When reaching the middle of 2
Starts to slide. Thus, the unit 2 is pulled out along the slide rail 1.

Hereinafter, the slide rail 1 of this embodiment will be described.
Will be described with reference to FIGS. 5 (A) to 5 (D). Here, the locking operation between the inner channel 13 and the inter channel 12 will be described, but the same applies to the locking operation between the inter channel 12 and the outer channel 11.

As shown in FIG. 5A, by pulling out the unit portion 2 in the direction of arrow A in FIG. 1, even if the inner channel 13 is drawn out from the inter channel 12, the ball bearing 15a holds the locking claw 12a. Until the inner channel 13 is exceeded, the inner channel 13 is slid smoothly by the lubricating action of the ball bearing 15a.

From this state, a slightly stronger force is applied to pull out the unit 2 in the direction of arrow A in FIG. 1 so that the ball bearing 14a at the upper left of FIG. 5B as shown in FIG. It passes over the locking claw 12a on the top right corner. At this time, since the slide rail 1 is attached at an angle, the inner channel 13 tends to be pulled back by the force applied by the weight of the unit 2. However, as indicated by the arrow in the figure, 1
The upper right locking pawl 12a presses the first upper left ball bearing 14a. As a result, the frictional force acting between the first upper left ball bearing 14a and the inter channel 12 or the inner channel 13 increases. As a result, the inner channel 13 is fixed so as not to be pulled back, and the unit 2 does not close.

However, in the state shown in FIG. 5B, a slight external force is applied to the unit 2 or the weight of the unit 2 increases, so that the fixing force by the frictional force is changed by the inner weight of the unit 2. The channel 13 may exceed the force withdrawn. At this time,
By further applying a force to pull out the unit portion 2 in the direction of arrow A in FIG. 1, the ball bearing 14a at the upper left of FIG. Go over the nail 12a. At the same time, the second ball bearing 14a from the upper left side of the drawing crosses the first upper right locking claw 12a.

As a result, as shown by arrows in FIG.
The upper right locking claw 12a presses the second upper left ball bearing 14a, and the second upper left locking claw 12a presses the first upper left ball bearing 14a. For this reason, the generated frictional force is
In the case of (B), it is almost double, and the inner channel 13 is fixed so as not to be pulled back with a stronger force.

The unit 2
, The upper left ball bearing 14a exceeds the upper left locking claw 12a. Since the locking claw 12a on the leftmost side has a greater force to press the ball bearing 14a than the other locking claw,
The frictional force acting between the ball bearing 14a and the inter channel 12 or the inner channel 13 becomes extremely large. Further, the frictional force of the second and third locking claws 12a from the left is also applied, and the force for fixing the inner channel 13 is extremely large. Therefore, even if the weight of the unit portion 2 becomes considerably heavy or a considerably large external force is applied to the unit portion 2, it is possible to prevent the unit portion 2 from wobbling or closing naturally.

When the unit 2 is closed, it may be closed with a force corresponding to the amount of the unit 2 pulled out. That is, if the unit 2 is pulled out with a sufficient length so as not to be swung or closed, an unnecessary large force is not required when the unit 2 is closed.

As described above, in the slide rail 1 of this embodiment, the inner channel 13 is connected to the
Alternatively, the force for fixing the inter channel 12 to the outer channel 11 increases. For this reason, according to the weight of the unit 2, the unit 2
Is pulled out, the unit section 2 can be sufficiently fixed. That is, it is not necessary to apply an unnecessarily large force to the drawer of the unit 2.

[Second Embodiment] In the above embodiment, the outer rails (outer rails 1) of the rails constituting the slide rails are fitted with each other.
1 and the interrail 12) on the locking claws 11a, 12
Although the case where a is provided has been described, in the present embodiment, the case where a locking claw is provided on the inner rail will be described.

FIG. 6 is a cross-sectional view showing the structure of the slide rail of this embodiment, and shows a cross section at a position corresponding to line BB in FIG. As shown in the figure, the slide rail of this embodiment is
6 and an inner channel 17 fitted inside the outer channel 16 and slidable with respect to the outer channel 16. The length of the inner channel 17 is
Slightly shorter than the length of The outer channel 16 and the inner channel 17 are each formed of a thin metal plate. The inner channel 17 is attached to the unit as in the case of the first embodiment.

Between the outer channel 16 and the inner channel 17, there are interposed retainers 18 which rotatably support a plurality of ball bearings 18a vertically at equal intervals. The outer channel 16 and the inner channel 17 are each provided with a ball bearing 18a.
The upper and lower sides are bent in a curved shape so as to engage with. A stopper 16a is provided at the outer end of the outer channel 16 in the sliding direction so as to come into contact with the retainer 18 at the maximum withdrawal so that the inner channel 17 does not come off from the outer channel 16.

Further, a plurality of locking claws 17a formed at regular intervals in the sliding direction at positions corresponding to the ball bearings 18a are provided at the inner ends in the sliding direction of the bent portions on the upper and lower sides of the inner channel 17. I have.
A plurality of ball bearings 18a are arranged on the upper and lower sides along the sliding direction. The size and shape of the locking pawls 17a are determined so that the unit attached to the inner channel 17 can be easily pulled out and the inner channel 16 can be fixed so as not to slide when the unit is pulled out. Has been adjusted. In particular, the size and shape of the outermost (right side in the figure) locking pawls 17a are different from those of other locking pawls in order to prevent the inner channel 17 from sliding back even when the unit becomes heavy. And the force for fixing the ball bearing 18a is large.

Hereinafter, the locking action by the slide rail of this embodiment will be described with reference to FIGS. 7 (A) and 7 (B). When the inner channel 17 is pulled out from the outer channel 16 by applying a slightly stronger force, FIG.
As shown in (A), the ball bearing 18a on the far right (both upper and lower) in the figure exceeds the locking claw 17a on the far left (both upper and lower). At this time, the inner channel 17
Even when an external force is applied to pull the ball back into the outer channel 16, the locking claw 17 a on the leftmost side presses the ball bearing 18 a on the rightmost side, thereby causing the ball bearing 18 a to move between the ball bearing 18 a and the inner channel 17 or the outer channel 16. Relatively large frictional force is applied to the inner channel 17 and the outer channel 16
Not pulled back into. That is, the slide rail is in a fixed state.

However, in the state shown in FIG. 7A, when the external force applied to the inner channel 17 increases, the inner channel 17 is pulled back into the outer channel 16. Therefore, if the amount of pulling out the inner channel 17 is increased, the number of ball bearings 18a exceeding the locking pawl 17a is increased, and the fixing force of the slide rail is accordingly increased.

As shown in FIG. 7 (B), when the inner channel 17 is pulled out from the outer channel 16 by applying a greater force, the rightmost (upper and lower) ball bearings 18a become the rightmost (upper and lower) ball bearings 18a. Locking claw 1
Over 7a. Since the locking pawl 17a on the rightmost side has a greater force to press the ball bearing 18a than the other locking pawls, the frictional force acting between the ball bearing 18a and the inner channel 17 or the outer channel 16 is extremely large. growing. Furthermore, the frictional force of the three (upper and lower) locking claws 12a from the left is also applied, so that the force for fixing the inner channel 17 becomes very large, and it is difficult to pull out the inter channel 17a from the outer channel 16. Become.

As described above, in the slide rail of this embodiment, a plurality of locking claws 17a are provided along the sliding direction on the inner channel 17 fitted inside, so that the longer the pull-out length is, the more the locking claw 17a is provided. The fixing force of the slide rail increases. Further, the locking pawl provided on the fitting side (the right side in the drawing) of the inner channel 17 increases the force for pressing the ball bearing 18a, so that the inner channel 17 is
6 does not easily come off. On the other hand, since the stopper is not provided at the end of the inner channel 17, if the inner channel 17 is pulled out from the outer channel 16 with a considerably large force, the inner channel 17 will not move.
Can be removed from the outer channel 16.

[Modification of Embodiment] In the above-described first embodiment, the locking claws 11a, 12a are provided above the outer channel 11 and the inter channel 12, respectively.
Has been described. In the second embodiment, the case where the locking claws 17a are provided on the upper and lower sides of the inner channel 17 has been described. However, according to the present invention, if a plurality of locking claws are provided in the direction in which the slide rail is pulled out, if the locking claw is provided at one or more locations corresponding to the locations where the ball bearings are arranged. Good.

In the above-described first embodiment, a triple slide rail 1 has been described. In the second embodiment, a double slide rail has been described. It can also be applied to rails. In addition, the present invention is configured such that a combination of two slide races, such as a slide rail applied to a magnetic disk drive described in Japanese Utility Model Laid-Open Publication No. 1-103093, substantially forms a triple slide race. It can be applied to various slide rails. Furthermore, the present invention can also be applied to a slide rail and the like, each of which is configured by a cylindrical outer rail and an inner rail, and is configured by a retainer that supports a plurality of ball bearings provided in the rail sliding direction. .

In the above embodiment, a case has been described in which the slide rail 1 of the present invention is applied to a terminal for a library lending management system. However, the present invention can be applied to any electronic device such as a computer peripheral device such as a magnetic disk device and an online system terminal of a bank. Further, the present invention can be applied not only to such an electronic device, but also to anything having a drawer mechanism, such as a drawer of a business desk.

[0049]

As described above, according to the slide rail of the present invention, the slide rail can be more strongly fixed in accordance with the length of the drawer. Further, a sufficient fixing force can be obtained without pulling out the outer rail or the inner rail with an unnecessary strong force.

According to the electronic apparatus of the present invention, by pulling out the unit according to the weight, a sufficient fixing force can be obtained on the slide rail. In addition, there is no need to pull out the unit with unnecessary force.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a terminal of a library lending management system to which a slide rail according to an embodiment of the present invention is attached.

FIG. 2 is a perspective view showing a configuration of a slide rail according to the first embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 2;

FIG. 5 is a diagram illustrating a locking operation by the slide rail according to the first embodiment of the present invention.

FIG. 6 is a sectional view showing a configuration of a slide rail according to a second embodiment of the present invention.

FIG. 7 is a diagram illustrating a lock operation by a slide rail according to a second embodiment of the present invention.

FIG. 8 is a perspective view showing a configuration of a conventional slide rail.

FIG. 9 is a sectional view taken along the line CC in FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slide rail 2 Unit part 11 Outer channel 11a Locking claw 12 Inter channel 12a Locking claw 13 Inner channel 13a Stopper 14 Retainer 14a Ball bearing 15 Retainer 15a Ball bearing 16 Outer channel 16a Stopper 17 Inner channel 17a Locking claw 18 Retainer 18a ball bearing

Claims (7)

[Claims] An outer rail, an inner rail fitted to the outer rail and slidable with respect to the outer rail; and an inner rail interposed between the outer rail and the inner rail. And a support member rotatably supporting a plurality of balls engaging with the outer rail and the inner rail, respectively, the slide rail being supported by the support member. Are arranged at substantially equal intervals along the sliding direction, and the outer rails are arranged at substantially the same interval as the balls along the sliding direction, and protrude toward the inner rail. A slide rail, wherein a plurality of claw portions are formed at positions corresponding to the plurality of balls. 2. An outer rail, an inner rail fitted to the outer rail and slidable with respect to the outer rail, and an inner rail interposed between the outer rail and the inner rail. And a support member rotatably supporting a plurality of balls engaging with the outer rail and the inner rail, respectively, the slide rail being supported by the support member. The balls are arranged at substantially equal intervals along the sliding direction, and the inner rails are arranged at substantially the same interval as the balls along the sliding direction, and protrude toward the outer rail. A slide rail, wherein a plurality of claw portions are formed at positions corresponding to the plurality of balls. 3. The slide rail according to claim 1, wherein the plurality of claw portions are configured to be able to press the contacted ball. 4. A claw portion formed at the end of the plurality of claw portions on a fitting side with a fitting rail can press the ball more strongly than other claw portions. The slide rail according to claim 3, wherein: 5. An outer rail, an inner rail fitted to the outer rail and slidable with respect to the outer rail, and an inner rail interposed between the outer rail and the inner rail. And a support member rotatably supporting a plurality of balls engaged with the outer rail and the inner rail, respectively, and one of the outer rail and the inner rail. And a unit configured to be retractable from the housing along the slide rail, and a unit for housing the electronic device, wherein the plurality of balls supported by the support member are: Are disposed at substantially equal intervals along the sliding direction, and the outer rails have substantially the same spacing as the distance between the balls along the sliding direction. And a plurality of claw portions protruding toward the inner rail are formed at positions corresponding to the plurality of balls. 6. An outer rail, an inner rail fitted to the outer rail and slidable with respect to the outer rail, and an inner rail interposed between the outer rail and the inner rail. And a support member rotatably supporting a plurality of balls engaged with the outer rail and the inner rail, respectively, and one of the outer rail and the inner rail. And a unit configured to be retractable from the housing along the slide rail, and a unit for housing the electronic device, wherein the plurality of balls supported by the support member are: Are disposed at substantially equal intervals along the sliding direction, and the inner rails are substantially the same interval as the balls along the sliding direction. And a plurality of claw portions protruding toward the outer rail are formed at positions corresponding to the plurality of balls. 7. The electronic device according to claim 5, wherein the unit is configured to be able to change an electronic device to be stored.