JP2016159723A - Seat belt buckle switch, seat belt buckle, and seat belt device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat belt buckle switch capable of reducing rotation on a surface on which a movable terminal slides.SOLUTION: A buckle switch 106 includes a substrate 114 installed in a buckle, electrode regions 118a, 118b, and 118c formed on the substrate, a slider 116 fitted to the substrate to be slidable thereon and configured to slide interlockingly with the attaching/detaching operation of a tongue plate, a movable terminal 120 having one or more conductive leg parts 124a, 124b, 126a, and 126b extending in the sliding direction of the slider to come into contact with the substrate or the electrode regions so that the slider can slide on the substrate to be or not to be in contact with the electrode regions, and a guide part 132 configured by providing one or more step parts on the substrate, the step parts being continuously extending along at least a part of the electrode regions, and the movable terminal being guided by the step parts during the sliding of the slider.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a seat belt device provided in a vehicle, a seat belt buckle included in the seat belt device, and a seat belt buckle switch provided inside the seat belt buckle.

  In recent years, a seat belt device is provided with a detection device that detects whether or not an occupant is wearing the seat belt. In such a seat belt device, it can be used as a judgment material for adjusting the deployment output when the airbag is inflated and deployed according to whether the seat belt is attached or not, or the retractor with a motor that winds the seat belt is controlled. It is possible to do. Such a detection device is mainly provided in a seat belt buckle (hereinafter abbreviated as “buckle”) as a seat belt buckle switch (hereinafter abbreviated as “buckle switch”), and detects the attachment / detachment of the buckle to the tongue plate. doing.

  Patent Document 1 describes a buckle provided with a buckle switch. The buckle switch includes a substrate having a fixed contact (switch piece) that forms an electrode region, and a moving contact that can be separated from or contact the switch piece. The substrate is fixed to the base member of the buckle through a substrate fixing member formed by molding using resin. The moving contact is attached to a sliding member slidably provided on the substrate.

  The sliding member slides relative to the substrate in conjunction with an ejector that can move in a direction associated with the attachment / detachment operation of the tongue plate. The sliding member has a guided portion that is spaced a predetermined distance from the guide surface of the substrate fixing member.

  In Patent Document 1, when the sliding member is biased in a direction orthogonal or almost orthogonal to the sliding direction, the guided member abuts against the guide surface of the substrate fixing member, so that the sliding member contacts each side surface of the substrate. The sliding member having the moving contact without being in contact with the substrate can be slid stably with respect to the substrate.

JP 2011-092377 A

  However, in Patent Document 1, there is a possibility that the moving contact rotates with respect to the sliding member when sliding on the substrate having the switch piece in conjunction with the attaching / detaching operation of the tongue plate. The rotation on the surface on which the moving contact slides increases the moving range on the substrate on which the moving contact moves. As a result, a switch piece having a large electrode area that only covers the moving range is required on the substrate.

  In view of such problems, an object of the present invention is to provide a seat belt buckle switch, a seat belt buckle, and a seat belt device that can reduce the rotation of the movable terminal on the sliding surface.

  In order to solve the above problems, a representative configuration of a seat belt buckle switch according to the present invention is a seat belt buckle switch that is installed on a seat belt buckle and detects whether or not a tongue plate is connected to the seat belt buckle. A substrate installed inside the seat belt buckle, an electrode region formed on the substrate, a slider slidably mounted on the substrate and slid in conjunction with the tongue plate attaching / detaching operation; One or more provided in the slider and extending in the sliding direction of the slider so as to be in contact or non-contact with the electrode region by sliding on the substrate. A step having a movable terminal having a conductive leg portion and one or more step portions provided on the substrate. Extend continuously or intermittently along at least a portion of the electrode regions, characterized in that it comprises a guide portion movable terminal is guided when the slider slid by the step portion.

  According to the above configuration, when the slider slides, the leg portion of the movable terminal can come into contact with the step portion of the guide portion provided on the substrate and extending along at least a part of the electrode region. Guided. Thereby, rotation on the surface which a movable terminal slides can be made small. Note that the movable terminal preferably has two or more leg portions in order to slide stably.

  When the rotation of the movable terminal during sliding is reduced, the movement range in which the leg moves on the substrate is reduced. Since the electrode region only needs to have an area enough to cover the reduced movement range, the electrode region can be reduced accordingly. Therefore, the amount of metal that forms the electrode region can be reduced. In addition, since the distance between the electrode regions increases as the electrode regions become smaller, it is difficult for the conductive foreign matter to short-circuit between the electrode regions, and resistance to the conductive foreign matter can be increased. If the electrode area is further reduced and the distance between the electrode areas is maintained, the size of the substrate can be reduced and the seat belt buckle switch can be reduced in size.

  Said level | step difference part is good to include the shape which protrudes outside the surface of a board | substrate. Thus, the leg portion of the movable terminal is reliably guided by the step portion of the guide portion when the slider slides.

  The step portion may include a groove shape that is recessed from the surface of the substrate. Accordingly, the leg portion of the movable terminal is reliably guided by the step portion by contacting the groove-shaped step portion of the guide portion when the slider slides. When the positional relationship between the substrate and the slider is arranged upside down, the electrode region is formed on the back surface of the substrate, so that the stepped portion protrudes outward from the back surface of the substrate, or from the back surface of the substrate. It may also include a recessed groove shape.

  Said level | step-difference part has a wall part used as the edge along the slide direction of a slider, and the wall part is good to contact the leg part of a movable terminal. Thereby, rotation of the leg part of a movable terminal is suppressed by contacting with the wall part of the guide part located in the side at the time of a slide.

  The leg portions and guide portions of the movable terminal may be arranged alternately. Thereby, the leg part of a movable terminal contacts the guide part located between leg parts at the time of a slide, and is guided by this. For this reason, rotation of the movable terminal during sliding can be suppressed.

  In order to solve the above-described problems, a representative configuration of a seat belt buckle according to the present invention includes the above-described seat belt buckle switch. Thereby, the seat belt buckle which can suppress rotation at the time of sliding of the movable terminal provided in the seat belt buckle switch can be realized.

  In order to solve the above problems, a typical configuration of a seat belt apparatus according to the present invention includes the above-described seat belt buckle. Thereby, when detecting whether or not the tongue plate is connected to the seat belt buckle, it is possible to realize a seat belt device capable of suppressing the rotation of the movable terminal provided in the seat belt buckle switch when sliding.

  ADVANTAGE OF THE INVENTION According to this invention, the seatbelt buckle switch, seatbelt buckle, and seatbelt apparatus which can make small rotation on the surface which a movable terminal slides can be provided.

It is a figure which illustrates the outline | summary of the seatbelt apparatus in embodiment of this invention. It is a figure which illustrates the buckle switch of FIG. It is a figure which illustrates the state before and behind the connection of the buckle and tongue plate of FIG. It is a figure which illustrates the board | substrate of the buckle switch of FIG. It is a figure which illustrates the board | substrate and movable terminal of the buckle switch of FIG. It is a figure explaining the positional relationship of the movable terminal of a buckle switch of FIG. 2, and a board | substrate. It is a figure which compares and illustrates the behavior at the time of sliding of the movable terminal of Drawing 6 (b) and Drawing 6 (c). It is a figure which illustrates the electrode area | region of FIG. It is a figure which illustrates the buckle switch in other embodiment of this invention. It is a figure which illustrates the movable terminal of the buckle switch in other embodiment of this invention. It is a figure which illustrates the board | substrate of the buckle switch in other embodiment of this invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a diagram illustrating an outline of a seat belt device according to an embodiment of the present invention. The seat belt device 100 includes a seat belt buckle (buckle 102) and a seat belt tongue plate (tang plate 104) as shown in the figure. The buckle 102 is provided with a seat belt buckle switch (buckle switch 106).

  The buckle switch 106 is a part that electrically detects whether or not the tongue plate 104 is connected to the buckle 102. Inside the buckle 102, a release button 108 for releasing the connection with the tongue plate 104, a frame 110 for installing various internal members, and the like are provided.

  The buckle switch 106 is located inside the buckle 102 and is installed between the frame 110 and the exterior 112. The buckle switch 106 is roughly composed of a substrate 114 and a slider 116 that slides on the substrate 114.

  FIG. 2 is a diagram illustrating the buckle switch 106 of FIG. FIG. 2A is an exploded perspective view of the buckle switch 106. FIG. 2B is a top view of the buckle switch 106. The substrate 114 of the buckle switch 106 is made of an insulator, and a fixed contact 118 made of a conductor is provided on the upper surface thereof as shown in the figure. The fixed contact 118 forms electrode regions 118a, 118b, and 118c by performing, for example, gold plating on a plane.

  In the present embodiment, the movable terminal 120 contacts and energizes any two of the three electrode regions 118a, 118b, and 118c, thereby detecting the connection state of the tongue plate 104 (see FIG. 1). Yes. As an example, the electrode region 118 a is a common contact located at the center of the substrate 114. The electrode region 118b is a connection state detection contact located on the back side (right side in the drawing) of the buckle 102. The electrode region 118c is an unconnected state detection contact located on the inlet side (left side in the figure) of the buckle 102. Note that the number of electrode regions 118a, 118b, and 118c is merely an example, and the number of electrode regions 118a, 118b, and 118c may be larger or may be arranged in two rows.

  The slider 116 is made of resin, is slidably attached to the substrate 114, and slides in conjunction with the attachment / detachment operation of the tongue plate 104. A movable terminal 120 is attached to the slider 116. A pin 122 is provided on the upper surface of the slider 116 as shown in the figure.

  The movable terminal 120 is formed by bending a thin metal plate. The movable terminal 120 is brought into either a contact state or a non-contact state with respect to the electrode regions 118a, 118b, and 118c as the slider 116 slides on the substrate 114. The movable terminal 120 has a pair of legs 124 a, 124 b, 126 a, 126 b that extend in the sliding direction (longitudinal direction of the substrate 114) and are bent so as to approach the substrate 114.

  The pair of leg portions 124a, 124b, 126a, 126b are conductive, and have main energizing portions 128a, 128b, 130a, 130b at their tips. The main energization portions 128a, 128b, 130a, and 130b are main portions for energizing the fixed contact 118, and are in contact with the electrode regions 118a, 118b, and 118c. The main energization portions 128a, 128b, 130a, and 130b are also in contact with the substrate 114 on which the electrode regions 118a, 118b, and 118c are not formed.

  The buckle switch 106 further includes an insulating guide portion 132 made of, for example, resin. The guide part 132 is a member that guides the movable terminal 120 when the slider 116 slides. As shown in FIG. 2A, the guide part 132 extends continuously in the longitudinal direction of the substrate 114, and cuts vertically on the electrode regions 118a, 118b, 118c and the substrate 114.

  FIG. 3 is a diagram illustrating the state before and after the connection between the buckle 102 and the tongue plate 104 of FIG. 1. FIG. 3A corresponds to the AA sectional view of FIG. FIG. 3B illustrates a state in which the tongue plate 104 is inserted into the buckle 102 of FIG.

  In the buckle 102, as illustrated in FIG. 3A, the pin 122 (see FIG. 2A) of the slider 116 of the buckle switch 106 is connected to the end 136 of the ejector 134. The ejector 134 is a part that functions when the tongue plate 104 is released from the buckle 102, and is provided on the bottom surface 138 of the frame 110. A groove is provided in the lower part of the side wall 140 of the frame 110, and the end 136 of the ejector 134 is exposed to the outside of the frame 110 through this groove.

  In the buckle 102, as shown in FIG. 3B, with the tongue plate 104 inserted, the tip of the tongue plate 104 contacts the ejector 134, and the ejector 134 is pushed further into the buckle 102. When the ejector 134 is pushed into the back, the slider 116 also slides on the substrate 114 to the back. At that time, the movable terminal 120 also slides on the substrate 114 to be in a contact or non-contact state with respect to the electrode regions 118a, 118b, and 118c.

  A spring (not shown) is connected to the back side of the ejector 134 in the buckle 102, and the spring is compressed in accordance with the insertion of the tongue plate 104. When the release button 108 (see FIG. 1) is pressed, the compression force of the spring is released, and the ejector 134 is pushed by this force to push the tongue plate 104 out of the buckle 102. Also at this time, since the slider 116 slides from the state shown in FIG. 3B to the state shown in FIG. 3A, the movable terminal 120 slides on the substrate 114 with respect to the electrode regions 118a, 118b, and 118c. Either in contact or non-contact.

  FIG. 4 is a diagram illustrating the substrate 114 of the buckle switch 106 of FIG. FIG. 4A is a top view of the substrate 114. FIG. 4B is a BB cross-sectional view of FIG. As shown in FIG. 4A, the guide part 132 is configured by a step part 142. The step portion 142 of the guide portion 132 is continuous in the longitudinal direction of the substrate 114, that is, the direction in which the movable terminal 120 slides on the substrate 114, and extends across the electrode regions 118 a, 118 b, 118 c and the substrate 114. Further, as shown in FIG. 4B, the stepped portion 142 of the guide portion 132 is affixed, for example, on the electrode region 118a and protrudes from the substrate 114 to the outside of the electrode region 118a. Further, the stepped portion 142 of the guide portion 132 has wall portions 144 a and 144 b that are edges along the sliding direction of the slider 116. The wall portions 144a and 144b are in contact with the main energization portions 128a, 128b, 130a, and 130b of the leg portions 124a, 124b, 126a, and 126b of the movable terminal 120 (see FIG. 5).

  Hereinafter, the positional relationship between the guide portion 132 and the main energization portions 128a, 128b, 130a, 130b of the movable terminal 120 will be described with reference to FIGS.

  FIG. 5 is a diagram illustrating the substrate 114 and the movable terminal 120 of the buckle switch 106 of FIG. However, in the drawing, the slider 116 to which the movable terminal 120 is attached is omitted. FIG. 5A is a top view showing a state in which the movable terminal 120 is arranged on the substrate 114. FIG.5 (b) is CC sectional drawing of Fig.5 (a).

  As shown in FIG. 5A, the guide part 132 is disposed on the substrate 114 and on the electrode regions 118a, 118b, and 118c along the sliding direction. The step portion 142 of the guide portion 132 has a length along the sliding direction longer than the length of the moving range of the leg portions 124a, 124b, 126a, 126b of the movable terminal 120. The movement range of the legs 124 a, 124 b, 126 a, 126 b of the movable terminal 120 means that the main current-carrying parts 128 a, 128 b, 130 a, 130 b located at the tips of the legs 124 a, 124 b, 126 a, 126 b are moved when the slider 116 slides. This is a range that can move on the substrate 114.

  Further, as shown in FIG. 5B, the step portion 142 of the guide portion 132 protrudes above the electrode regions 118a and 118c here. The wall portions 144a and 144b of the guide portion 132 are erected from the main energization portions 128a, 128b, 130a, and 130b, and extend along the main energization portions 128a, 128b, 130a, and 130b.

  FIG. 6 is a view for explaining the positional relationship between the movable terminal 120 and the substrate 114 of the buckle switch 106 of FIG. FIGS. 6A and 6B are diagrams schematically showing the positional relationship between the substrate 114 and the guide portion 132 and the positional relationship between the guide portion 132 and the movable terminal 120, respectively. FIG. 6C is a schematic diagram showing the behavior of the movable terminal 120 when the guide portion 132 is not present as a comparative example.

  First, as shown in FIG. 6A, for example, the width of the guide portion 132 is La, and its position is defined by the degree of symmetry. As an example, the degree of symmetry is defined by the deviation from the center D of the width of the substrate 114 (dotted line in the drawing) as the center D (dotted line in the drawing) of the substrate 114. For the substrate 114 on which such a guide portion 132 is disposed, the dimension between the main energization portions 128a, 128b, 130a, and 130b shown in FIG. 6B is Lb.

  Therefore, in this embodiment, the positional relationship between the movable terminal 120 and the substrate 114 is defined only by the width dimension La of the guide part 132, the degree of symmetry, and the dimension Lb between the main current-carrying parts 128a, 128b, 130a, and 130b. It does not depend on the dimensions of 116. And the guide part 132 is arrange | positioned between the main electricity supply parts 128a, 128b, 130a, 130b, as shown in FIG.6 (b). For this reason, the main energizing portions 128a, 128b, 130a, 130b can come into contact with the guide portion 132 when the slider 116 slides, and the rotation in the sliding direction can be reduced.

  On the other hand, in the comparative example shown in FIG. 6C, the guide portion 132 is not disposed on the substrate 114. In the comparative example, when the slider 116 slides, the slider 116 rotates with respect to the substrate 114, and the movable terminal 120 further rotates with respect to the slider 116. That is, the slider 116 rotates with respect to the substrate 114 due to a gap due to the difference between the inner width of the slider 116 and the outer width of the substrate 114. The movable terminal 120 rotates relative to the slider 116 due to a gap due to the difference between the inner width of the slider 116 and the outer width of the movable terminal 120. With these two rotations, the main energization portions 128a, 128b, 130a, 130b of the movable terminal 120 rotate, for example, counterclockwise as indicated by the arrow F.

  FIG. 7 is a diagram illustrating a comparison of the behavior of the movable terminal 120 in FIGS. 6B and 6C when sliding. In the drawing, a part of the electrode regions 118a and 118c on the substrate 114 and the main energization part 128b indicated by the solid line of the movable terminal 120 are illustrated, and further, the main energization part 128b in the comparative example of FIG. The state is illustrated by a dotted line.

  As in this embodiment, when the main energization part 128b is guided by the guide part 132, the rotation of the movable terminal 120 becomes small. On the other hand, since the guide portion 132 does not exist in the comparative example, the main energization portion 128b is rotated when the movable terminal 120 is slid, as indicated by a dotted line in the figure. That is, in the comparative example, the movement range of the leg portions 124a, 124b, 126a, 126b of the movable terminal 120 is increased. In the drawing, the extension of the movement range in the electrode region 118c is illustrated by the dimension Lc. Therefore, according to the present embodiment, by providing the guide portion 132 on the substrate 114, the moving range of the leg portions 124a, 124b, 126a, 126b of the movable terminal 120 when the slider 116 slides can be reduced.

  FIG. 8 is a diagram illustrating the electrode regions 118a and 118c of FIG. In the drawing, the electrode regions 118a and 118c according to the present embodiment are indicated by solid lines, and the electrode region according to the comparative example is indicated by dotted lines.

  In the present embodiment, as described above, since the rotation of the movable terminal 120 during sliding is reduced and the movement range of the legs 124a, 124b, 126a, 126b is reduced, the corresponding amount is shown in FIG. Thus, the width dimension of the electrode region 118c can be reduced from the dimension Ld to the dimension Le. Therefore, in this embodiment, the amount of metal necessary for forming the electrode region can be reduced.

  Further, by reducing the width dimension of the electrode region, as shown in FIG. 8B, the distance between the electrode regions 118a and 118c can be increased from the dimension Lf to the dimension Lg. For this reason, in this embodiment, it becomes difficult to short-circuit between electrode region 118a, 118c with a conductive foreign material, and can also improve the tolerance with respect to a conductive foreign material.

  Furthermore, if the width of the electrode region is reduced and the distance between the electrode regions 118a and 118c is kept large as shown in FIG. 8 (c), it is shown by the dotted line in the figure. As described above, the width dimension of the substrate 114 can be reduced from the dimension Lh to the dimension Li, and the buckle switch 106 can be reduced in size.

  In the above embodiment, one guide portion 132 is disposed between the main energization portions 128a, 128b, 130a, 130b of the movable terminal 120. However, the present invention is not limited to this, and a plurality of guide portions 132 may be disposed. (See FIG. 9). FIG. 9 is a diagram illustrating a buckle switch 106 according to another embodiment of the present invention.

  As shown in the figure, the buckle switch 106 has two guide portions 132A and 132B arranged outside the main energizing portions 128a, 128b, 130a and 130b, respectively. In this way, in the movable terminal 120 at the time of sliding, the main energization parts 128a and 130a can contact the guide part 132A, and the main energization parts 128b and 130b can contact the guide part 132B.

  Therefore, by alternately arranging the plurality of guide portions 132A and 132B and the main energization portions 128a, 128b, 130a, and 130b, the main energization portions 128a, 128b, 130a, and 130b of the movable terminal 120 are guided by the guide portion 132A when sliding. 132B and is guided by this. Therefore, the rotation of the movable terminal 120 can be reduced during sliding, and the movement range of the legs 124a, 124b, 126a, 126b can be reduced.

  In the above embodiment, the main energization portions 128a, 128b, 130a, and 130b are provided at the tips of the pair of leg portions 124a, 124b, 126a, and 126b. However, the present invention is not limited to this, and one leg portion may be provided. In order for the movable terminal 120 to slide more stably, it is preferable to have two or more legs. However, even if there is only one leg portion, the stepped portion 142 of the guide portion 132 protrudes above the electrode regions 118a, 118b, and 118c from the substrate 114, and extends along the electrode regions 118a, 118b, and 118c. If so, the movable terminal 120 can be guided to reduce the range of movement of the legs 124a, 124b, 126a, 126b.

  Moreover, in the said embodiment, although the level | step-difference part 142 of the guide part 132 is extended continuously along electrode area | region 118a, 118b, 118c, it is not limited to this. As an example, the stepped portion 142 of the guide portion 132 may extend intermittently along at least a part of the electrode regions 118a, 118b, and 118c. Even in such a guide portion, if the main energization portions 128a, 128b, 130a, and 130b of the movable terminal 120 can be contacted at the time of sliding, the rotation of the movable terminal 120 is reduced and the legs 124a, 124b, and 126a thereof. 126b can be reduced.

  Furthermore, in the said embodiment, although the main electricity supply parts 128a, 128b, 130a, 130b of the movable terminal 120 can contact the wall parts 144a, 144b of the guide part 132 at the time of a slide, it is not limited to this. As an example, the wall portions 144a and 144b of the guide portion 132 may always be in contact with the main energization portions 128a, 128b, 130a, and 130b of the movable terminal 120. As described above, the main energization portions 128a, 128b, 130a, and 130b of the movable terminal 120 are always in contact with the wall portions 144a and 144b of the guide portion 132 located on the side thereof, so that the rotation of the movable terminal 120 when sliding is performed. Can be further suppressed.

  FIG. 10 is a view illustrating movable terminals 120A, 120B, and 120C of a buckle switch according to another embodiment of the present invention. In the above embodiment, the leg portions of the movable terminal 120 are “one pair”, but the present invention is not limited to this. As an example, as shown in FIG. 10A, the movable terminal 120A has two legs 124a and 124b on one side and one leg 150 on the other side. The leg portion 150 includes a main energization portion 152.

  As shown in FIG. 10B, the movable terminal 120B has three legs 124a, 124b, 154 on one side and two legs 126a, 126b on the other side. The leg portion 154 includes a main energization portion 156. As shown in FIG. 10C, the movable terminal 120C has two legs 124a and 124b on one side and one leg 126b on the other side. Even with such movable terminals 150A, 150B, and 150C, rotation on the sliding surface of the movable terminals 150A, 150B, and 150C is reduced by being guided by the guide portions 132, 132A, and 132B when the slider 116 slides. it can.

  FIG. 11 is a view illustrating a buckle switch substrate 114A according to another embodiment of the invention. An electrode region 158 is formed on the surface of the substrate 114A. The substrate 114A has a groove-shaped guide portion 160 that is recessed from the surface thereof. The stepped portion 162 of the guide portion 160 extends continuously or intermittently along at least a part of the electrode region 158.

  According to this embodiment, when the slider 116 is slid, the leg portion of the movable terminal comes into contact with the wall portions 164a and 164b of the step portion 162 of the guide portion 160, so that the movable terminal is reliably guided by the step portion 162. Is done. Therefore, the rotation of the movable terminal on the sliding surface can be reduced.

  In each of the above embodiments, the electrode regions 118 and 158 are formed on the surfaces of the substrates 114 and 114A. However, the present invention is not limited to this. As an example, when the buckle switch 106 is disposed at the other end that is vertically symmetrical with respect to the end 136 of the ejector 134 shown in FIG. 3, the electrode regions 118 and 158 are formed on the back surface of the substrate 114. In such a case, the stepped portion 142 of the guide portion 132 may include a shape protruding outward from the back surface of the substrate 114 or a groove shape that is recessed from the back surface of the substrate 114.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  The present invention can be used for a seat belt device provided in a vehicle, a seat belt buckle included in the seat belt device, and a seat belt buckle switch provided inside the seat belt buckle.

DESCRIPTION OF SYMBOLS 100 ... Seat belt apparatus, 102 ... Buckle, 104 ... Tongue plate, 106 ... Buckle switch, 108 ... Release button, 110 ... Frame, 112 ... Exterior, 114, 114A ... Substrate, 116 ... Slider, 118 ... Fixed contact, 118a, 118b, 118c, 158 ... Electrode region, 120, 120A, 120B, 120C ... Movable terminal, 122 ... Pin, 124a, 124b, 126a, 126b, 150, 154 ... Leg, 128a, 128b, 130a, 130b, 152, 156 ... Main energizing part, 132, 132A, 132B, 160 ... Guide part, 134 ... Ejector, 136 ... Ejector end, 138 ... Frame bottom, 140 ... Frame side wall, 142,162 ... Step part, 144a, 144b, 164a, 164b ... Wall part

Claims (7)

A seat belt buckle switch that is installed in a seat belt buckle and detects whether or not a tongue plate is connected to the seat belt buckle;
A substrate installed inside the seat belt buckle;
An electrode region formed on the substrate;
A slider that is slidably mounted on the substrate and that slides in conjunction with the attaching and detaching operation of the tongue plate;
The slider is provided on the slider and extends in the sliding direction of the slider so that the slider slides on the substrate to be in contact with or non-contact with the electrode region. A movable terminal having one or more conductive legs in contact;
One or more step portions are provided on the substrate, and the step portions extend continuously or intermittently along at least a part of the electrode region, and the movable portion is moved by the step portion when the slider slides. A seat belt buckle switch comprising a guide portion for guiding a terminal.   The seat belt buckle switch according to claim 1, wherein the stepped portion includes a shape protruding outward from the surface of the substrate.   The seat belt buckle switch according to claim 1, wherein the stepped portion includes a groove shape that is recessed from the surface of the substrate. The step portion has a wall portion that becomes an edge along the sliding direction of the slider,
The seat belt buckle switch according to any one of claims 1 to 3, wherein the wall portion is in contact with the leg portion of the movable terminal.   The seat belt buckle switch according to any one of claims 1 to 4, wherein the leg portions of the movable terminal and the guide portions are alternately arranged.   A seat belt buckle comprising the seat belt buckle switch according to any one of claims 1 to 5.   A seat belt apparatus comprising the seat belt buckle according to claim 6.

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