JP2017171044A - Slide device for vehicle and rolling element circulation unit for slide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slide device for a vehicle and a rolling element circulation unit for a slide device capable of suppressing occurrence of noise without deteriorating durability of the rolling element circulation unit.SOLUTION: A rolling element circulation unit 40 comprises: an annular encasing part 41 which is configured between a lower rail 10 and an upper rail 20, and which can arrange a plurality of rolling elements 70 in an annular form that can circulate the elements. The circular encasing part 41 is formed of materials having different rigidities including a part constituting a contacting surface 55 which contacts an operation surface 15 of the lower rail 10 through the plurality of rolling elements 70, and which is made of a material having a rigidity higher than that of a material constituting a non-contacting part 57 not contacting the operation part 15 through the plurality of rolling elements 70.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a slide device for a vehicle and a rolling element circulation unit for the slide device.

  2. Description of the Related Art Conventionally, there are a vehicle slide device that supports a vehicle seat movably in the front-rear direction, and a rolling element circulation unit used in the slide device. For example, in Patent Document 1, in a vehicle seat slide device having a first rail and a second rail, a pair of annular housings fixed to the second rail and capable of annularly arranging a plurality of rolling elements in a freely rolling manner. The structure which has the rolling-element circulation unit which has a part is described. According to this configuration, when the rolling element abuts on the operating surface provided on the first rail and the annular housing portion and rolls and circulates, the first rail and the second rail move relative to each other, thereby smoothly moving back and forth. Enable.

JP 2012-71565 A

  In addition, the rolling element circulation unit described in Patent Document 1 includes a first case, a second case that is assembled by engaging with the first case, and a plurality of units that are accommodated in accommodating portions provided in both cases. And rolling elements. The first case is made of a metal material, and the second case is made of a resin material. Further, the plurality of rolling elements are composed of metal spheres and resin spheres, and the metal spheres and the resin spheres are alternately arranged in the annular housing portion, thereby generating contact noise between the rolling elements. It is described that suppresses.

  However, when the metal sphere disclosed in Patent Document 1 circulates in contact with the annular housing portion of the first case as the first rail and the second rail move relative to each other, the metal sphere is made of a metal material. There was a concern that the contact sound would be generated by rubbing against the formed annular housing portion of the first case.

  The present invention has been made in view of such circumstances, and an object of the present invention is to form a rolling element and an annular shape that are generated when the rolling element rolls and circulates in the annular accommodating portion in accordance with the relative movement of the first rail and the second rail. Provided are a vehicle slide device and a slide device rolling unit circulation unit capable of suppressing contact noise with a housing unit without reducing the durability of the rolling body circulation unit.

  In order to solve the above-described problems, the problem-solving means of the present invention includes a first rail, a second rail supported by the first rail so as to be relatively movable in the extending direction of the first rail, The first rail has an operating surface facing the second rail, and a plurality of rolling elements that roll in contact with the operating surface, and an annular housing in which the rolling elements can be arranged in an annular manner so as to be capable of rolling and circulating. And a rolling element circulation unit configured between the first rail and the second rail, and the annular housing portion is formed of a material having different rigidity, and the operation is performed via the rolling element. It is preferable that the part constituting the abutting surface that abuts on the surface is made of a material having higher rigidity than the part constituting the non-abutting surface that does not abut against the operating surface via the rolling element.

  According to the above configuration, the contact surface in the annular housing portion of the rolling element circulation unit provided between the first rail and the second rail is in contact with the operating surface of the first rail via the rolling element. Yes. That is, the contact surface receives the load from the first rail via the rolling elements. The part constituting the contact surface is formed of a material having higher rigidity than the part constituting the non-contact surface that does not receive a load from the first rail. As a result, the contact surface can sufficiently receive the load applied from the first rail via the rolling elements, so that it is possible to suppress a decrease in the durability of the annular housing portion. On the other hand, since the load is not applied to the portion constituting the non-contact surface, the portion constituting the non-contact surface can be formed of a material having lower rigidity than the portion constituting the corresponding contact surface. Thereby, since the impact which a rolling element contact | abuts on a non-contact surface is relieve | moderated, the contact sound at the time of a rolling element rolling and circulating through an annular accommodating part can be reduced. Therefore, it is possible to suppress a decrease in durability of the annular housing portion by using the annular housing portion formed of a material having different rigidity, and further, the rolling element rolls and circulates in the annular housing portion. It is possible to suppress the generation of abnormal noise due to the contact sound.

  Further, as a means for solving the problems of the present invention, the rolling circulation unit forms the annular accommodating portion that abuts the working surface of the first rail via the rolling element and engages the second rail. The first case portion and the second case portion are assembled and engaged with the first case, and the portion forming the contact surface of the annular housing portion in the first case portion is It is preferable that the first case portion is made of a material having higher rigidity than other portions.

  According to the above configuration, the rolling element circulation unit is configured by the first case portion and the second case portion, and the contact surface of the annular housing portion formed in the first case portion is the other of the first case portion. It is comprised with the material which has rigidity higher than a site | part. That is, the first case portion is formed of a material having high rigidity at the contact surface that receives the load from the first rail through the rolling element, and other portions that do not receive the load from the first rail are in contact. It is made of a material having rigidity lower than that of the surface. As a result, by forming the first case part where the material having high rigidity is required and the part where the material is not so with different rigid materials, it is more preferable to generate abnormal noise without impairing the durability of the first case part. Can be suppressed.

  Moreover, as a means for solving the problems of the present invention, in the rolling element circulation unit, it is preferable that the contact surface is formed of a metal material and a portion other than the contact surface is formed of a resin material.

  According to the above configuration, the contact surface that receives the load from the first rail is formed of a metal material having high rigidity, and the portion other than the contact surface that does not require high rigidity is formed of the resin material. The weight of the rolling element circulation unit can be reduced without reducing the durability of the rolling element circulation unit.

  Further, as a problem-solving means of the present invention, the plurality of rolling elements include a first sphere formed of a metal material with a first diameter, a second diameter smaller than the first diameter, and a resin. It is preferable that the first sphere and the second sphere are alternately arranged in the annular housing portion so as to be able to roll and circulate freely.

  According to the above configuration, the metal spheres having the first diameter and the resin spheres having a smaller diameter than the metal spheres are alternately arranged in the annular housing portion. Since the resin sphere is smaller in diameter than the metal sphere, the friction between the resin sphere and the annular housing portion and the working surface can be suppressed, compared to the case where both spheres are set to the same diameter. Wear and deformation of the sphere can be suppressed.

  As a means for solving the problems of the present invention, the first rail, the second rail supported by the first rail so as to be relatively movable in the extending direction of the first rail, and the first rail in the first rail An operating surface facing the two rails, and a plurality of rolling elements that roll in contact with the operating surface, and an annular housing portion that can be annularly arranged so that the rolling elements can circulate in a rolling manner. A rolling element circulation unit configured between one rail and the second rail, wherein the annular housing portion is formed of a material having different rigidity and abuts on the operating surface via the rolling element. Is a rolling element circulation unit for a slide device that is formed of a material having higher rigidity than a portion that constitutes a non-contact surface that does not contact the operating surface via the rolling elements. preferable.

  ADVANTAGE OF THE INVENTION According to this invention, the contact sound at the time of a rolling element rolling-circulating a rolling element circulation unit can be suppressed, without suppressing the fall of durability of a rolling element circulation unit.

The perspective view which shows the vehicle seat. The front view of FIG. 1 of one Embodiment in this invention. The perspective view which shows the 2nd rail of the embodiment. The perspective view which shows the 2nd rail with which the rolling element circulation unit of the embodiment is assembled | attached. (A) The exploded perspective view which shows the structure of the rolling element circulation unit of the embodiment, (b) The exploded perspective view which shows the structure of the rolling element circulation unit of the embodiment. The disassembled perspective view of the base part of the rolling element circulation unit of the embodiment. The front view of the rolling element circulation unit of the embodiment. Sectional drawing of AA in FIG. 4 of the embodiment. (A) The figure which shows typically the perspective view seen from the arrow B direction of FIG. 8, (b) The figure which shows typically the perspective view seen from the arrow B direction of FIG.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.

(Whole vehicle seat)
As shown in FIG. 1, the vehicle slide device is fixed to a pair of left and right lower rails (the “first rail” of the present invention) 10 fixed in the front-rear direction of a vehicle floor 1, and fixed to a vehicle seat 2. A pair of left and right upper rails (the “second rail” of the present invention) 20 is supported so as to be relatively movable. Further, as shown in FIG. 2, a rolling element circulation unit 40 is provided between the upper rail 20 and the lower rail 10 in order to move the upper rail 20 smoothly and without backlash with respect to the lower rail 10.

(Configuration of lower rail)
As shown in FIG. 2, the lower rail 10 includes a base portion 11 that is horizontal to the vehicle floor 1, side portions 12 that extend upward from both ends of the base portion 11, and a hanging portion that extends inward and downward from the upper ends of both side portions 12. 13. The upper and lower ends of the side portions 12 are provided with inclined portions 14 that are inclined inward. The inner surface of the both side portions 12 is set as the working surface 15.

(Upper rail configuration)
As shown in FIG. 2, the upper rail 20 includes two rail pieces 20a and 20b. One rail piece 20a is formed on the base portion 21 that is horizontal to the vehicle floor 1, the side wall 22 that extends upward from one end of the base portion 21 that faces the other rail piece 20b, and the other rail piece 20b side of the base portion 21. It has the standing part 23 extended upwards from a certain other end, and the connection part 24 extended from this standing part 23 in the upward inward direction. Similar to the rail piece 20 a, the other rail piece 20 b has a base portion 21, a side wall 22, an upright portion 23, and a connecting portion 24. The upper rail 20 having the space C surrounded by the two standing portions 23 is configured by overlapping the connecting portions 24 of the two rail pieces 20a and 20b. The outer surfaces of both wall portions 22 are defined as non-operation surfaces 25. The non-operating surface 25 is configured to face the operating surface 15 provided on the lower rail 10.

  Further, as shown in FIG. 3, attachment portions 26 to which the rolling element circulation units 40 are attached are provided in the vicinity of both ends in the longitudinal direction of both wall portions 22 of the upper rail 20. Each attachment portion 26 is provided with two holes 27 to which the rolling element circulation unit 40 is attached.

  As shown in FIG. 4, four rolling element circulation units 40 are attached to the upper rail 20 in the present embodiment by attaching the rolling conductor circulation units 40 to both hole portions 27. Note that the number of the rolling conductor circulation units 40 may be changed as appropriate depending on the length of the lower rail 10 and the upper rail 20 or the like.

(Configuration of rolling element circulation unit 40)
As shown in FIGS. 5A and 5B, the rolling element circulation unit 40 includes a base portion 50 (the “first case portion” of the present invention) and a cover portion 60 that is engaged and assembled with the base portion 50. (The present invention “second case portion”). An annular accommodation path 42 that forms part of a pair of annular accommodation portions 41 in which a plurality of rolling elements 70 can be accommodated in a rolling manner is formed on the surface of the base portion 50 that faces the cover portion 60. The annular accommodating passage 42 is configured by a groove portion having a semicircular cross section formed in an annular shape. Further, the respective annular accommodating paths 42 are arranged in parallel so as to be positioned up and down in the attached state to the upper rail 20. Further, on the surface of the cover portion 60 that faces the base portion 50, an annular housing groove 61 that forms the annular housing portion 41 is formed together with the annular housing passage 42 that is annularly provided so as to correspond to the annular housing passage 42. Yes. The rolling element 70 moves so as to roll and circulate between the annular accommodating passage 41 and the annular accommodating groove 61. The base portion 50 and the cover portion 60 are configured to be engageable with each other by, for example, an adhesive or a fitting structure.

  As shown in FIG. 6, the base portion 50 includes a first base portion 51 and a second base portion 56.

  The first base portion 51 is formed with a contact surface 55 that forms a part of the pair of annular accommodating passages 42. The contact surface 55 is in contact with the operating surface 15 of the lower rail 10 via a plurality of rolling elements 70. The first base 51 is provided with flange portions 52 that extend from both ends of the contact surface 55. In the vicinity of the end portions of both flange portions 52, there is provided a through hole 53 that can be fixed by inserting a screw or the like (not shown) through a hole portion 27 provided in the attachment portion 26 of the upper rail 20. It has been. Further, the engaging piece 63 of the cover portion 60 is inserted into the both flange portions 52 together with the communication hole 59 of the second base portion 56, thereby allowing the second base portion 56 and the cover portion 60 to be fixed. 54 is provided.

  The second base portion 56 is formed with a non-contact surface 57 that forms part of the pair of annular accommodating passages 42. The non-contact surface 57 is configured not to contact the operating surface 15 of the lower rail 10 via the plurality of rolling elements 70. Further, a partition wall portion 58 is formed between the pair of annular accommodating passages 42 in the second base portion 56 so as to isolate the rolling elements 70 accommodated in both annular accommodating passages 42 from each other. That is, the contact surface 55 of the first case 51 and the non-contact surface 57 of the second case 56 together form a pair of annular housing paths 42. Further, both ends of the second base portion 56 are provided with communication holes 59 that can be fixed by inserting the locking pieces 63 of the cover portion 60 together with the insertion holes 54 of the first base portion 51.

  In the present embodiment, the first base portion 51 provided with the contact surface 55 is formed of a metal material, and the second base portion 56 provided with the non-contact surface 57 is formed of a resin material. That is, both the annular accommodating paths 41 are formed of a material having a contact surface 55 higher than the non-contact surface 57. The first base portion 51 only needs to be formed of a material having higher rigidity than the second base portion 56, and the material may be changed as appropriate.

  As shown in FIGS. 5A and 5B, a pair of annular receiving grooves 61 are formed on the surface of the cover portion 60 that faces the base portion 50. The two annular housing grooves 61 are each formed by a groove portion having a semicircular cross section formed in an annular shape so as to correspond to the pair of annular housing portions 41 provided in the base portion 50. A wall portion 62 is formed between the annular housing grooves 61 so as to isolate the rolling elements 70 housed in the annular housing grooves 61 from each other. The wall portion 62 corresponds to the partition wall portion 58 provided in the base portion 50.

  Further, on the surface of the cover portion 60, a flat portion 63 is formed that faces the operating surface 15 of the lower rail 10 when the rolling element circulation unit 40 is mounted on the attachment portion 26 of the upper rail 20. Slope portions 64 are formed at the upper and lower positions of the flat portion 63 so as to follow the inclined portion 14 of the lower rail 10.

  The inclined surface portion 64 is provided with a long hole 65 that allows the rolling element 70 to be exposed to and contact the operating surface 15 of the lower rail 10. Both the long holes 65 are set to be narrower than the diameter of the rolling element 70 so that the rolling element 70 that is rolling and circulating in the annular housing portion 41 does not come out. Further, the long hole 65 has a shape in which both ends in the longitudinal direction are curved and the central portion extends substantially linearly along the longitudinal direction. The rolling element 70 accommodated in the annular accommodating portion 41 is exposed so that the rolling element 70 can contact the operating surface 15.

  At both ends of the surface of the base portion 60 facing the base portion 50, the cover portion 60 is inserted into both the insertion holes 54 of the first base portion 51 and both the communication holes 59 of the second base portion 56. A locking piece 66 that can be engaged with 50 is provided. The locking piece 66 may be provided with a claw or the like for preventing the removal from the insertion hole 54 and the communication hole 59.

As shown in FIGS. 5 and 6, the rolling elements 70 are respectively accommodated in a pair of annular accommodating portions 41 formed in the base portion 50. In this embodiment, the rolling element 70 is composed of a metal sphere 71 (the present invention “first sphere”) and a resin sphere 72 (the present invention “second sphere”), and the metal sphere 71 and the resin sphere. 72 are alternately arranged in each annular collecting passage 41. 5 and 6, the resin sphere 72 is indicated by hatching.
In the present embodiment, the resin sphere 72 and the metal sphere are formed with a smaller diameter than 71. That is, assuming that the diameter of the metal sphere 71 is the first diameter R1 and the diameter of the resin sphere 72 is the second diameter R2, the metal sphere 71 and the resin sphere 72 so that “R1> R2” is satisfied. Is formed. As shown in FIG. 7, the rolling element circulation unit 40 accommodates a plurality of rolling elements 70 in a pair of annular accommodating portions 41 provided in the base portion 50, and engages the cover portion 60 with the base portion 50. It is comprised integrally by. Further, as shown in FIGS. 3 and 4, the rolling element unit 40 is fixed by inserting a screw or the like (not shown) through the hole portion 27 of the attachment portion 26 of the upper rail 20 and the through hole 53. ing.

(Operation of vehicle sliding device)
Next, the operation of the vehicle slide device according to the present embodiment will be described.

  When the rolling element circulation unit 40 is attached to the attachment portion 26 of the upper rail 20, the rolling element 70 is exposed from the long holes 65, so that the rolling element 70 is brought into contact with the contact surface 55 of the base portion 50 as shown in FIG. 8. In contact with the operating surface 15. Here, as shown in FIGS. 9A and 9B, when the rolling element 70 abuts against the operating surface 15, the annular accommodating portion 41 is arranged so that five rolling elements 70 abut against the operating surface 15. Is formed. FIG. 9A shows a case where two rolling spheres 70 are in contact with the working surface 15 and two metal spheres 71 and three resin spheres 72 are in contact with each other. Further, FIG. 9B shows a case where the lower rail 10 slides with respect to the upper rail 20. That is, when the rolling element 70 contacts the working surface 15, three metal balls 71 and two resin balls 72 contact each other. Therefore, at least two metal spheres 101 always face the operating surface 15.

  When the upper rail 20 slides relative to the lower rail 10, the rolling elements 70 interposed between the operating surface 15 and the contact surface 55 circulate and circulate, so that each rolling element 70 in the annular housing portion 41 rolls. Circulate while moving. For this reason, the upper rail 20 can smoothly slide relative to the lower rail 10.

  As described above, according to the present embodiment, the following effects can be obtained.

  (1) According to the present embodiment, the contact surface 55 in the annular accommodating path 42 of the rolling element circulation unit 40 provided between the lower rail 10 and the upper rail 20 is operated by the lower rail 10 via the rolling element 70. It is in contact with the surface 15. That is, the contact surface 55 receives the load from the lower rail 10 via the rolling element 70. The portion constituting the contact surface 55 is formed of a metal material having higher rigidity than the portion constituting the non-contact surface 57 that does not receive a load from the lower rail 10. As a result, the load applied from the lower rail 10 via the rolling elements 70 can be sufficiently received, and a decrease in the durability of the annular housing 42 can be suppressed.

  (2) Further, since a load from the lower rail 10 is not applied to the portion constituting the non-contact surface 57, the portion constituting the non-contact surface 57 has lower rigidity than the portion constituting the contact surface 55. It can be formed of a resin material. Thereby, since the impact which the rolling element 70 contact | abuts with the non-contact surface 57 can be relieve | moderated, generation | occurrence | production of the noise by the contact sound at the time of the rolling element 70 rolling and circulating through the annular accommodating path 42 is suppressed. be able to. Therefore, according to the rolling element circulation unit 40 configured in this way, it is possible to suitably suppress the generation of abnormal noise when the rolling element 70 circulates and circulates without impairing the durability of the base portion 50. .

  (3) According to the present embodiment, only the contact surface 55 for receiving the load from the lower rail 10 of the base portion 50 is formed of the metal material, and the portion other than the contact surface 55 of the base portion 50 is formed of the resin material. Is formed. Thus, the weight can be reduced as compared with the case where the base portion 50 is entirely formed of a metal material.

  (4) According to the present embodiment, the contact surface 55 that receives the load from the lower rail 10 of the base portion 50 is formed of a metal material. Accordingly, it is possible to suppress a decrease in the durability of the base portion 50, compared to the case where the base portion 50 is formed of a metal material.

  (5) According to the present embodiment, the rolling element 70 includes the metal sphere 71 and the resin sphere 72, and the metal sphere 71 is formed with a larger diameter than the resin sphere 72. According to this configuration, when the rolling element 70 circulates in the annular accommodating path 42, the resin sphere 72 has less frictional force with the annular accommodating path 42 than the metal sphere 71. Compared to the case where all of the balls are made of the metal sphere 71, it is possible to suppress the generation of abnormal noise due to the contact sound when the rolling element 70 rolls and circulates in the annular accommodating path 42.

  (6) According to the present embodiment, the rolling element 70 includes the metal sphere 71 and the resin sphere 72, and the metal sphere 71 is formed with a larger diameter than the resin sphere 72. Thereby, when the rolling element 70 rolls and circulates in the annular accommodating path 41, the resin sphere 72 has a smaller diameter than the metal sphere 71, so that the friction with the contact surface 55 can be suppressed. . That is, it is possible to prevent the resin sphere 72 from being worn and deformed.

  (7) According to the present embodiment, at least five rolling conductors 70 are provided to face the working surface 15. Thus, since at least five rolling elements 70 can roll and circulate while facing the working surface 15 of the annular accommodating passage 42 in parallel, the rolling elements 70 can smoothly roll and circulate. it can. Furthermore, since the rolling sphere 70 has the metal spheres 71 and the resin spheres 72 arranged alternately, as shown in FIGS. And at least two of them abut. Accordingly, since the resin sphere 72, which is a material having lower rigidity than the metal sphere 71, is prevented from coming into contact with the operating surface 15, the resin sphere 72 is prevented from being worn and deformed by the operating surface 15. be able to.

  (8) According to this embodiment, at least two metal spheres 72 face the working surface 15. From this, compared with the case where only one metal sphere 72 faces the working surface 15, the load from the lower rail 10 is applied to one of the metal spheres 72 facing the working surface 15. Further, deformation of the metal sphere 102 can be suppressed.

  (9) According to this embodiment, the rolling element circulation unit 40 inserts a screw or the like (not shown) through the hole portion 27 of the attachment portion 26 of the upper rail 20 and the through hole 53 of the rolling element circulation unit 40. It is fixed by that. That is, the attachment portion 26 only needs to form the hole portion 27, and the upper rail 20 is not punched or bent, for example, in order to provide the rolling element circulation unit 40. Therefore, when the attachment portion 26 is formed, the process of processing the upper rail 20 can be omitted.

  (10) According to this embodiment, at least two metal spheres 71 abut against the working surface 15. From this, compared with the case where only one metal sphere 72 abuts against the operation surface 15, a load from the lower rail 10 is applied to one of the metal spheres 72 facing the operation surface 15, The deformation of the metal sphere 72 can be suppressed.

  In addition, you may change the said embodiment as follows.

  In the present embodiment, the rolling element 70 includes a metal sphere 71 and a resin sphere 72. However, it is not always necessary to be configured by the metal sphere 71 and the resin sphere 72. For example, the metal sphere 71 or the resin sphere 72 may be used alone.

  In the present embodiment, the metal spheres 71 and the resin spheres 72 are alternately arranged. Here, “alternate” in the present embodiment includes, for example, a case where two resin spheres 72 are arranged between the metal spheres 71. When two resin spheres 72 are arranged between the metal spheres 71, the number of rolling elements 70 in contact with the operation surface 15 is appropriately changed so that the resin spheres 72 do not contact the operation surface 15. Also good. That is, the arrangement relationship between the metal sphere 71 and the resin sphere 72 is not limited to the above embodiment. Furthermore, the positional relationship in which the rolling element 70 abuts against the operating surface 15 is not limited to the above embodiment.

  In the present embodiment, a pair of annular housing portions 41 are formed on the base portion 50 and the cover portion 60. However, the base unit 50 and the cover unit 60 do not necessarily have to be integrally formed as a pair. For example, the base unit 50 and the cover unit 60 are divided into two parts, and the annular housing units 41 are provided in the base unit 50 and the cover unit 60, respectively. Also good.

  -In this embodiment, when attaching the rolling element circulation unit 40 to the attachment part 26 of the upper rail 20, for example, by interposing an elastic body (not shown) between the flange 52 and the attachment part 26, You may make it suppress the rattling of the rolling element circulation unit 40. FIG.

  In the present embodiment, the rolling element circulation unit 40 is configured such that a flange portion 52 is provided on the base portion 50, and the flange portion 52 is attached to the attachment portion 26 of the upper rail 20. However, for example, the rolling element circulation unit 40 may be configured such that the cover portion 60 is provided with an equivalent flange portion, and the cover portion 60 and the base portion 50 are attached to the attachment portion 26.

  In the present embodiment, the rolling element circulation unit 40 is configured such that a flange portion 52 is provided on the base portion 50, and the flange portion 52 is attached to the attachment portion 26 of the upper rail 20. However, for example, a claw portion (not shown) for engaging the rolling element circulation unit 40 with the attachment portion 26 is formed on the attachment portion 26, so that the rolling element is not used without using a screw or the like (not shown). The circulation unit 40 may be engaged with the upper rail 20.

  -In this embodiment, the rolling element circulation unit 40 is comprised by the base part 50 and the cover part 60. As shown in FIG. However, for example, the rolling element circulation unit 40 may be configured to be divided in a direction perpendicular to the longitudinal direction of the rolling element circulation unit 40.

  In this embodiment, it is described that the metal sphere 71 has a larger diameter than the resin sphere 72. However, the size relationship between the diameters of the metal sphere 71 and the resin sphere 72 is not limited. For example, the metal sphere 71 and the resin sphere 72 may be composed of the same diameter.

DESCRIPTION OF SYMBOLS 1 ... Floor, 2 ... Seat, 10 ... Lower rail (this invention "1st rail"), 11 ... Base part, 12 ... Side part, 13 ... Hanging part, 14 ... Inclined part, 15 ... Working surface, 20 ... Upper rail ( Invention "second rail"), 20a ... first rail piece, 20b ... second rail piece, 21 ... base part, 22 ... side wall, 23 ... standing part, 24 ... connecting part, 25 ... non-operating surface, 26 ... Attachment part 27 ... hole part 40 ... rolling element circulation unit 41 ... annular housing part 42 ... annular housing path 50 ... base part 51 ... first base part 52 ... flange part 53 ... through hole, 54 ... Insertion hole, 55 ... Contact surface, 56 ... Second base portion, 57 ... Non-contact surface, 58 ... Bulkhead portion, 59 ... Communication hole, 60 ... Case portion, 61 ... Annular receiving groove, 62 ... Wall portion , 63 ... plane part, 64 ... slope part, 65 ... long hole, 66 ... locking piece, 70 ... rolling element, 71 ... Sp-made sphere, 72 ... resin spheres.

Claims (5)

The first rail;
A second rail supported by the first rail so as to be relatively movable in the extending direction of the first rail;
An operating surface of the first rail facing the second rail;
It has a plurality of rolling elements that roll in contact with the operating surface, and has an annular housing portion that can be arranged in a ring so as to be able to roll and circulate the rolling elements, between the first rail and the second rail. A rolling element circulation unit configured in
The annular housing portion is formed of a material having different rigidity, and a portion constituting a contact surface that contacts the working surface via the rolling element is not contacted with the working surface via the rolling element. A vehicle slide device formed of a material having higher rigidity than a portion constituting a contact surface. The rolling circulation unit is
A first case portion that forms the annular housing portion that abuts on the operating surface of the first rail via the rolling element and engages the second rail;
The second case portion and the second case portion are assembled and engaged with the first case portion,
2. The vehicle according to claim 1, wherein a portion of the first case portion that forms the contact surface of the annular housing portion is formed of a material having higher rigidity than other portions of the first case portion. Slide device. The rolling element circulation unit is
3. The vehicle slide device according to claim 1, wherein the contact surface is formed of a metal material, and a portion other than the contact surface is formed of a resin material. The plurality of rolling elements are:
A first sphere having a first diameter and formed of a metal material;
A second sphere having a second diameter smaller than the first diameter and formed of a resin material;
The vehicular slide device according to any one of claims 1 to 3, wherein the first sphere and the second sphere are alternately arranged in the annular housing portion so as to freely roll and circulate.
The first rail;
A second rail supported by the first rail so as to be relatively movable in the extending direction of the first rail;
An operating surface of the first rail facing the second rail;
It has a plurality of rolling elements that roll in contact with the operating surface, and has an annular housing portion that can be arranged in a ring so as to be able to roll and circulate the rolling elements, between the first rail and the second rail. A rolling element circulation unit configured in
The annular housing portion is formed of a material having different rigidity, and a portion constituting a contact surface that contacts the working surface via the rolling element is not contacted with the working surface via the rolling element. A rolling element circulation unit for a slide device, which is formed of a material having higher rigidity than a portion constituting a contact surface.

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