WO2012101727A1 - Buckle switch, buckle and seatbelt device - Google Patents

Buckle switch, buckle and seatbelt device Download PDF

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Publication number
WO2012101727A1
WO2012101727A1 PCT/JP2011/007284 JP2011007284W WO2012101727A1 WO 2012101727 A1 WO2012101727 A1 WO 2012101727A1 JP 2011007284 W JP2011007284 W JP 2011007284W WO 2012101727 A1 WO2012101727 A1 WO 2012101727A1
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WO
WIPO (PCT)
Prior art keywords
buckle
tongue
fixed
movable
switch
Prior art date
Application number
PCT/JP2011/007284
Other languages
French (fr)
Japanese (ja)
Inventor
知博 高尾
Original Assignee
タカタ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by タカタ株式会社 filed Critical タカタ株式会社
Publication of WO2012101727A1 publication Critical patent/WO2012101727A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B11/00—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts
    • A44B11/25—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts with two or more separable parts
    • A44B11/2503—Safety buckles
    • A44B11/2507—Safety buckles actuated by a push-button
    • A44B11/2523—Safety buckles actuated by a push-button acting parallel to the main plane of the buckle and in the same direction as the fastening action

Definitions

  • the present invention relates to a technical field of a buckle used in a seat belt device which is mounted on a seat of an automobile or other transportation and restrains an occupant or a belt device which restrains an operator in a construction work site.
  • the present invention relates to a technical field of a buckle switch that is switched on and off by a latch (hereinafter also referred to as engagement) between a tongue and a buckle, a technical field of a buckle that includes the buckle switch, and a technical field of a seat belt device that includes the buckle.
  • Seats for various transportation facilities including automobiles are equipped with seat belt devices to restrain passengers in the event of an emergency such as a collision.
  • a buckle is usually provided in order to easily attach and remove the seat belt.
  • the seat belt is attached to the occupant by latching the latch member of the buckle to the engaging portion of the tongue supported by the seat belt.
  • a buckle switch for detecting a latch between the tongue and the buckle is provided.
  • the ejector moves according to the insertion of the tongue, and the slider moves directly together with the movement of the ejector, so that the movable contact moves together with the slider.
  • the long and short fixed contacts are electrically connected via the movable contact, and the buckle switch is turned on. Therefore, the engagement between the tongue and the buckle is detected.
  • a buckle switch having a movable contact having a property is known (for example, refer to Patent Document 2).
  • a movable contact is provided on an actuator that is actuated by a slider that moves in conjunction with the movement of a tongue inserted into the buckle.
  • the movable contact moves directly with the movement of the slider interlocked with the insertion of the tongue, so that the intermediate fixed terminal and The fixed terminal on the side opposite to the tongue insertion port side of the buckle is electrically conducted through the movable contact, and the buckle switch is turned on. Thereby, the engagement between the tongue and the buckle is detected.
  • the buckle is a stroke (movement) from a non-operating position of a movable movable buckle member (an ejector in Patent Document 1 or a slider in Patent Document 2) that moves directly by insertion of a tongue to a latch position of the tongue and the latch member.
  • the amount varies depending on the buckle specifications.
  • the buckle switch is manufactured by simply corresponding to such different stroke amounts of the buckle movable component member, the stroke amount of the movable contact changes and the installation positions of the plurality of fixed terminals change. For this reason, the buckle switch described in Patent Documents 1 and 2 must be manufactured entirely corresponding to different stroke amounts of the buckle movable component.
  • the buckle switch is manufactured for each different stroke amount of the buckle movable component member, not only the manufacturing man-hour of the buckle switch is increased, but the cost of the buckle switch is increased.
  • the present invention has been made in view of such circumstances, and its purpose is to flexibly cope with different stroke amounts of the movable buckle component moved by inserting the tongue, and to reduce the number of manufacturing steps. It is an object to provide a buckle switch, a buckle, and a seat belt device that can reduce costs more effectively.
  • a buckle switch includes a plurality of fixed terminals each having a fixed contact, a plurality of lead wires electrically connected to the plurality of fixed terminals, and the plurality of the plurality of fixed terminals.
  • a stroke adjusting unit that adjusts a stroke amount of the movable portion so that a stroke amount of the movable contact is constant or substantially constant corresponding to a preset stroke amount of the buckle movable component member. It is characterized by having.
  • the buckle switch according to the present invention is characterized in that the movable terminal and the operating portion are integrally formed. Further, in the buckle switch according to the present invention, the operating portion is formed in an elongated flat plate shape, and the stroke adjusting portion is provided at both ends of the elongated flat plate shape and alternatively pressed by the buckle movable component member. A distance between the first and second pressed surfaces of the first and second pressed parts pressed by the movable buckle component member, the first and second pressed parts being It is characterized in that it is set corresponding to the stroke amount set in advance of the buckle movable component.
  • each of the fixed contacts of the plurality of fixed terminals has a spring property and is elastically bent when the movable contact comes into contact.
  • each of the plurality of fixed terminals is formed in an elongated strip shape, and a predetermined interval is provided in the stroke direction of the buckle movable component, and the longitudinal direction is the buckle. It is characterized by being arranged in a direction orthogonal or substantially orthogonal to the stroke direction of the movable component member.
  • the buckle switch according to the present invention is characterized in that the plurality of lead wires are connected to the corresponding fixed terminals by welding. Furthermore, the buckle switch according to the present invention has a switch holder in which a fixed terminal mounting portion and a harness mounting portion are provided integrally, and the plurality of fixed terminals are mounted on the fixed terminal mounting portion, and the harness mounting portion A plurality of lead wire harnesses are attached to the head. Furthermore, the buckle switch according to the present invention is characterized in that the plurality of fixed terminals are all attached to the switch holder by caulking the fixed terminal attaching portion of the switch holder.
  • the buckle according to the present invention is supported movably between a base having both side walls and a non-operating position where the tongue is not inserted and an operating position where the tongue is latched on the both side walls.
  • the latch member and the base are provided movably between a non-actuated position located when the tongue is not inserted and an actuated position located when the tongue is latched by the latch member,
  • An ejector that moves to the operating position by being inserted from a tongue insertion port and constantly urges the tongue toward the tongue insertion port, and a release operation for releasing the latch between the tongue and the latch member
  • the buckle according to the present invention is characterized in that the buckle movable component is the ejector.
  • the seat belt device includes a seat belt retractor that winds up the seat belt, a tongue that is slidably supported by the seat belt, and a tongue that is provided on the vehicle body and is detachably engaged.
  • a buckle wherein the buckle is any one of the buckles of the present invention described above.
  • the stroke adjusting unit is disposed on the movable terminal of the buckle switch. Accordingly, the movable contact of the movable contact member corresponding to the stroke amount of the movable buckle member from the non-actuated position of the movable movable buckle member to the position of the movable buckle member in the state where the latch member is engaged with the tongue by inserting the tongue is provided.
  • the stroke amount is adjusted to be constant or almost constant. Therefore, the buckle switch can be flexibly adapted to the specifications of the buckle with different stroke amounts of the movable buckle component without changing the shape and arrangement position of the switch portion.
  • the plurality of fixed contacts all have spring properties and the movable terminal does not have spring properties, electrical contact between each fixed contact and the movable contact of the movable terminal can be performed more stably.
  • the operating portion of the movable terminal is not elastically deformed, and the stroke adjusting function of the stroke adjusting portion of the movable terminal can be more effectively exhibited.
  • each fixed contact since each fixed contact has a spring property, each fixed contact becomes relatively short.
  • the plurality of fixed terminals are elongated in a direction orthogonal or substantially orthogonal to the extending direction (tang insertion direction) of each fixed contact. Then, the length of the buckle switch in the tongue insertion direction can be further shortened by arranging the plurality of fixed terminals so that their longitudinal directions are orthogonal or substantially orthogonal to the tongue insertion direction.
  • the welding allowance is relatively small, so the connection allowance between the plurality of lead wires and the corresponding fixed contact can be reduced. Become. Thereby, it becomes possible to make the structure of the connection part of each lead wire and each fixed contact compact. In particular, by using spot welding with a small welding allowance for welding, the aforementioned connecting portion can be made more effective and compact.
  • the buckle switch can be configured as a switch unit by integrally assembling the plurality of fixed terminals, the movable terminals, and the plurality of lead wires to the switch holder.
  • the buckle switch can be easily assembled to the base of the buckle and the like, and the assembling workability of the buckle switch can be improved.
  • each fixed terminal can be stably and firmly attached to the switch holder by attaching the fixed terminal body of each fixed terminal to the switch holder by caulking the switch holder.
  • the buckle movable component member by using an ejector as the buckle movable component member, it becomes possible to directly press (actuate) the operating portion of the movable terminal with the ejector. Since the ejector is pressed by the engaging portion of the tongue inserted into the buckle and directly strokes, the movable contact can be moved more effectively. As a result, it is possible to more stably detect the engagement state between the engagement portion of the tongue and the latch member of the buckle.
  • FIG. 1 is a perspective view which shows an example of embodiment of the buckle which concerns on this invention
  • FIG. 3 is a perspective view which shows the buckle of the example shown to (A) in which the tongue was inserted and engaged.
  • FIG. 3 is a front view of the buckle switch shown in FIG. 3
  • B is a top view of the buckle switch
  • C is a bottom view of the buckle switch
  • D is a right side view of the buckle switch. It is the figure which looked at the buckle switch from V direction in FIG.4 (D).
  • or (C) is a perspective view of the fixing terminal of the buckle switch shown in FIG. 3, respectively.
  • (A) is a diagram showing a state before the fixed terminal is crimped to the switch holder
  • (B) is a diagram showing a state after the fixed terminal is crimped to the switch holder
  • (C) is a VIIC-VIIC in (A).
  • (D) is a sectional view taken along the line VIID-VIID in (B). It is a figure which shows the movable terminal and part of ejector of the buckle switch of the example shown in FIG. (A) thru
  • or (C) is a figure explaining the action
  • FIG. 1 is a diagram schematically showing an example of an embodiment of a seat belt device according to the present invention.
  • the seat belt device 1 of this example is basically the same as a conventionally known three-point seat belt device.
  • 1 is a seat belt device
  • 2 is a vehicle seat
  • 3 is a seat belt retractor disposed in the vicinity of the vehicle seat 2
  • 4 is retractably wound on the seat belt retractor 3
  • a belt anchor 4 a at the tip is
  • 5 is a guide anchor that guides the seat belt 4 pulled out from the seat belt retractor 3 toward the occupant's shoulder, and 6 is guided from this guide anchor 5.
  • the seatbelt 4 mounting operation and mounting release operation in the seatbelt apparatus 1 are the same as those of a conventionally known seatbelt apparatus.
  • the seat belt 4 When the seat belt 4 is not attached, the tongue 6 is not engaged with the buckle 7, and the seat belt 4 has its entire amount (the amount that can be wound up) stored in a conventionally known spool (not shown) of the seat belt retractor 3. It is wound up. Further, when the seat belt 4 shown in FIG. 1 is attached to the occupant, the seat belt 4 is pulled out from the seat belt retractor 3 by a predetermined amount, and the tongue 6 is engaged with the buckle 7. Thereafter, when the hand is released from the tongue 6, the excessively drawn seat belt 4 is wound on the spool of the seat belt retractor 3. Thus, the seat belt 4 is attached to the occupant.
  • FIG. 2A is a perspective view showing an example of an embodiment of a buckle according to the present invention
  • FIG. 2B is a perspective view showing the buckle of the example shown in FIG. 2A with a tongue inserted and engaged.
  • FIG. 2A and 2B do not show the inside of the buckle, the buckle of this embodiment is different only in the structure of the buckle switch and the latch detection method by the buckle switch.
  • the configuration of the buckle itself and the operation of the buckle itself are substantially the same as the buckle described in JP-A-2001-211912.
  • the buckle 7 of this example includes a base formed of a U-shaped frame having both side walls and a bottom, a latch member that can be latched to a tongue, and a latch member described in JP-A-2001-211912.
  • a lock pin that prevents movement in the latch release direction
  • a release operation button that performs a latch release operation of the latch member
  • an ejector that can be biased in a direction to release the tongue from the buckle
  • a slider that holds the lock pin, an upper cover, and The lower cover and at least the latch member, the operation button, and each spring for urging the ejector to the inoperative position are provided.
  • the configuration of the buckle itself and the operation of the buckle itself of the present invention are the same as the buckle described in the above-mentioned Japanese Patent Application Laid-Open No. 2001-211912, and can be understood by referring to this publication. Omitted.
  • the buckle 7 of this example includes a buckle switch 8.
  • FIG. 3 is a perspective view showing the buckle switch of this example
  • FIG. 4A is a front view of the buckle switch
  • FIG. 4B is a top view of the buckle switch
  • FIG. 4C is a bottom view of the buckle switch
  • 4 (D) is a right side view of the buckle switch
  • FIG. 5 is a view of the buckle switch viewed from the V direction in FIG. 4 (D).
  • the buckle switch 8 of this example includes an insulating switch holder 9 and three conductive first to third fixed terminals. 10, 11, 12, a conductive movable terminal 13, and a harness 17 in which three conductive first to third lead wires 14, 15, 16 are bundled.
  • the switch holder 9 is made of, for example, resin.
  • the switch holder 9 includes a fixed terminal mounting portion 18 for mounting the first to third fixed terminals 10, 11, 12, a movable terminal mounting portion 19 for mounting the movable terminal 13, and the first to third lead wires 14.
  • , 15, 16 has a harness fixing support portion 20 for fixing and supporting the harness 17.
  • the first to third fixed terminals 10, 11, and 12 are elongated and thin strip-shaped first to third fixed terminals fixed to the fixed terminal mounting portion 18, respectively.
  • the third fixed terminal body 10a, 11a, 12a and the first to third fixed contact points 10b, 11b, 12b extending from the first to third fixed terminal bodies 10a, 11a, 12a are provided.
  • the first to third fixed terminal bodies 10a, 11a, 12a and the first to third fixed contacts 10b, 11b, 12b are all formed from a single material having spring properties (relatively soft elasticity).
  • the first to third fixed contacts 10b, 11b, and 12b are elastically deflectable.
  • the first fixed contact 10b extends in the tongue insertion direction from the right edge (downstream edge in the tongue insertion direction) in FIG. 6A of the first fixed terminal body 10a, and then reverse to the tongue insertion direction. It is bent so as to be bent in the direction and further inclined so as to be separated from the first fixed terminal body 10a as it advances in the direction opposite to the tongue insertion direction. Further, the tip end portion of the first fixed contact 10b is formed as a first contact portion 10b 1 which is formed in a substantially U-shape and can be electrically contacted with the movable terminal 13. The first fixed contact 10b when the movable terminal 13 is in contact with the first contact portion 10b 1 is as resiliently flexible.
  • the first fixed contact 10b is cut ⁇ from the middle to the tip thereof to be divided into two parts. Accordingly, the first contact portion 10b 1 is configured such that one of the two contact portions and the other contact portion can be elastically bent independently of each other. As a result, the movable terminal 13 can independently come into contact with the two divided contact portions of the first contact portion 10b 1 so that the movable terminal 13 can stably contact the first contact portion 10b 1. Become.
  • the second fixed contact 11b is formed exactly the same as the first fixed contact 10b, and has a second contact portion 11b 1 divided into two, which is the same as the first contact portion 10b 1 .
  • the third fixed contact 12b is only provided symmetrically with the first and second fixed contacts 10b and 11b in FIGS. 6A to 6C, and other configurations of the third fixed contact 12b. Is formed in the same manner as the first and second fixed contacts 10b and 11b. Therefore, the third fixed contact 12b has a third contact portion 12b 1 divided into two, which is the same as the first and second contact portions 10b 1 and 11b 1 .
  • the first to third fixed terminals 10, 11, and 12 are attached to the fixed terminal attaching portion 18 of the switch holder 9 as follows. That is, as shown in FIGS. 7A and 7C, a pair of mounting holes 10c, 11c, and 12c having the same size are provided in the first to third fixed terminals 10, 11, and 12, respectively. In addition, at positions corresponding to the mounting holes 10c, 11c, and 12c of the fixed terminal mounting portion 18, projections 18a that can penetrate the mounting holes 10c, 11c, and 12c are provided, respectively. Then, as shown in FIGS. 7B and 7D, the projections 18a are pressurized and caulked by ultrasonic waves, whereby the first to third fixed terminals 10, 11, and 12 are fixed to the fixed terminal mounting portion 18. Attached to.
  • the first to third fixed terminals 10, 11, 12 are connected to the fixed terminal mounting portion 18 of the switch holder 9, the ejector 21 of the buckle 7 (shown in FIG. 8 described later; corresponding to the movable buckle component of the present invention). ) Are disposed at predetermined intervals along the movement direction, and are electrically insulated from each other and attached so as not to move.
  • the first to third fixed terminals 10, 11, and 12 are arranged so that the longitudinal direction of the first to third fixed terminal bodies 10 a, 11 a, and 12 a is orthogonal to or substantially orthogonal to the tongue insertion direction. Arranged.
  • the first to third fixed terminals 10, 11, and 12 are arranged in this order from the tongue insertion side (left side in FIG. 4A) of the buckle 7.
  • the movable terminal 13 is disposed on the movable terminal mounting portion 19 of the switch holder 9 so as to be slidable in the moving direction of the ejector 21.
  • the movable terminal 13 is provided integrally with the movable terminal 13 that is relatively long and flat in the moving direction of the ejector 21, and strokes (moves) the movable terminal 13. 21 has a plate-like operating portion 13b that is relatively elongated in the moving direction.
  • the movable contact 13a and the actuating portion 13b are connected to each other at the center in the longitudinal direction, and are formed in a substantially H shape.
  • operation part 13b can also be provided separately from the movable terminal 13, and the action
  • the movable contact 13a is contactable first to third fixed contacts 10b, 11b, the contact portions 10b 1, 11b 1, 12b 1 first to third of 12b. Further, the first and second guide portions 13c and 13d are bent at both ends of the movable contact 13a so as to be inclined to the opposite side to the contact surfaces of the first to third contact portions 10b 1 , 11b 1 and 12b 1. It is said that. By these first and second guide portions 13c and 13d, the movable contact 13a can smoothly and stably contact the first to third contact portions 10b 1 , 11b 1 and 12b 1 .
  • both end portions of the actuating portion 13b are first and second pressed portions 13e and 13f which are bent at right angles or substantially right angles to the same side as the first and second guide portions 13c and 13d.
  • the pressing portion 21a that is integrally projected on the ejector 21 of the buckle 7 is positioned between the first and second pressed portions 13e and 13f. ing.
  • the pressing portion 21a moves with the movement of the ejector 21, and the left end of the pressing portion 21a in FIG. 8 is the first pressed portion.
  • the movable terminal 13 After contact with 13e, the movable terminal 13 can be moved together with the ejector 21, and when the ejector 21 moves in the tongue insertion direction (rightward in FIG. 8), the pressing portion 21a of the ejector 21 The movable terminal 13 is movable together with the ejector 21 in the same direction after moving and moving so that the right end of the pressing portion 21a in FIG. 8 contacts the second pressed portion 13f.
  • the position of the first pressed portion 13e can be arbitrarily changed by simply changing the folding position within a predetermined range as shown by a one-dot chain line in FIG. Is possible.
  • the position of the second pressed portion 13f can be arbitrarily changed by simply changing the folding position within a predetermined range as shown by a two-dot chain line in FIG.
  • the distance L between the facing surfaces of the first and second pressed parts 13e and 13f is within a predetermined range. It can be set arbitrarily.
  • the stroke amount of the ejector 21 of the buckle 7 varies depending on the specifications of the buckle 7. Therefore, when the entire buckle switch 8 actuated by the ejector 21 is manufactured with various stroke amounts of the ejector 21, the stroke amount of the movable contact 13 changes and the first to third fixed terminals 10, 11 are changed. , 12 change, and as a result, the switch holder 9 also changes. For this reason, in the specification of the buckle 7, not only the manufacturing man-hour of the buckle 7 increases, but also the cost of the buckle 7 increases.
  • the first and second pressed parts are changed by changing at least one of the positions of the first and second pressed parts 13e and 13f as described above.
  • the distance L between the facing surfaces 13e and 13f is adjusted to a size corresponding to the stroke amount of the ejector 21 according to the specifications of the buckle 7.
  • the buckle switch 8 of this example includes the switch holder 9, the first to third fixed terminals 10, 11, 12, the movable contact 13a, the first and second guide portions 13c, 13d, and their shapes. Without changing the dimensions and arrangement position, that is, the shape and arrangement position of the switch portion of the buckle switch 8, the stroke of the ejector 21 can be flexibly adapted to the specifications of the buckle 7.
  • the first and second pressed parts 13e and 13f of the operating part 13b are ejected from the inoperative position of the ejector 21 to at least the position of the ejector 21 with the latch member engaged with the tongue 6.
  • the first to third fixed contacts 10b, 11b, 12b have spring properties
  • the movable terminal 13 does not have spring properties, so that the first to third fixed contacts 10b, 11b, 12b have the spring properties.
  • the movable contact 13a of the movable terminal 13 are more stably electrically contacted, the first and second pressed parts 13e and 13f are not elastically deformed, and the stroke adjusting part of the movable terminal 13 is stroked. The adjustment function is more effectively exhibited.
  • the leading ends of the first to third lead wires 14, 15, 16 are respectively connected to the first to third fixed terminal bodies 10a, 11a, 12a of the corresponding first to third fixed terminals 10, 11, 12 respectively.
  • Direct electrical connection by welding In that case, spot welding with a small welding allowance is preferable.
  • the tips of the first to third lead wires 14, 15, 16 and the first to third fixed terminal bodies 10a, 11a, 12a can be directly connected by solder. However, since the soldering cost is larger than the welding cost, welding is preferable to soldering.
  • the harness 17 of the first to third lead wires 14, 15, 16 connected to the first to third fixed terminal bodies 10 a, 11 a, 13 a is fixedly supported by the harness fixing support portion 20.
  • the first to third fixed terminals 10, 11, 12, the movable terminal 13, and the first to third lead wires 14, 15, 16 are integrally assembled to the switch holder 9. It is configured as a switch unit.
  • the buckle switch 8 unitized in this way is assembled to the buckle 7 by attaching the switch holder 9 to the base of the buckle 7.
  • the ejector 21 is not attached to the ejector 21 in the same manner as the buckle described in Japanese Patent Laid-Open No. 2001-211912. It is located on the tongue insertion port side of the buckle 7 (the leftmost side in FIG. 9A) by a spring that biases toward the non-actuated position. For this reason, the pressing part 21a of the ejector 21 abuts on the first pressed part 13e of the operating part 13b of the movable terminal 13, and the first pressed part 13e is moved to the left in FIG. 9A.
  • the movable terminal 13 is also located on the tongue insertion port side of the buckle 7 (the leftmost side in FIG. 9A).
  • the movable contact 13a of the movable terminal 13 is in electrical contact with the first and second contact portions 10b 1 and 11b 1 of the first and second fixed contacts 10b and 11b.
  • the first and second fixed contacts 10b and 11b are electrically connected to each other via the movable contact 13a
  • the third fixed contact 12b is electrically connected to the first and second fixed contacts 10b and 11b. Blocked.
  • the buckle switch 8 is turned off.
  • the first and second fixed contacts 10b and 11b are elastically bent due to the spring property, and the third fixed contact 12b is in a free state.
  • the engagement of the tongue 6 inserted into the buckle 7 is similar to the conventional tongue and buckle.
  • the tip of the part 6 a comes into contact with the ejector 21 of the buckle 7.
  • the ejector 21 moves to the right in FIG. 9A against the urging force of the spring by the pressing force of the tongue 6.
  • the pressing portion 21a of the ejector 21 is merely separated from the first pressed portion 13e, does not contact any of the first and second pressed portions 13e, 13f, and does not press them. Therefore, even if the ejector 21 moves to the right, the movable terminal 13 does not move, and the buckle switch 8 is kept off.
  • the pressing portion 21a of the ejector 21 contacts the second pressed portion 13f and presses the second pressed portion 13f. Then, the movable terminal 13 moves to the right as the ejector 21 moves to the right. Accordingly, as shown in FIG. 9B, the movable contact 13a is separated from the first fixed contact 10b of the first fixed terminal 11, and the second guide portion 13d of the movable contact 13a is the third fixed terminal. It abuts on the 13th fixed contact 12b. Thereby, the 1st fixed contact 10b will be in a free state.
  • the third fixed contact 12b is elastically bent by the second guide portion 13d. Then, as shown in FIG. 9C, the movable contact 13a is in electrical contact with the third fixed contact 12b.
  • the second and third fixed contacts 11b and 12b are electrically connected to each other via the movable contact 13a, and the first fixed contact 10b is electrically disconnected from the second and third fixed contacts 11b and 12b.
  • the buckle switch 8 is turned on by switching the buckle switch 8 from the OFF circuit to the ON circuit by the movable contact 13a.
  • the tongue 6 When the occupant releases the tongue 6 after the tongue 6 is inserted into the buckle 7 at the maximum, the tongue 6 is moved toward the tongue insertion port of the buckle 7 by the ejector 21 biased by the spring (FIG. 9C). It moves slightly to the left) and the engaging portion 6a of the tongue 6 latches on the latch member of the buckle 7. Thus, the tongue 6 is latched to the buckle 7. In this manner, when the tongue 6 is latched by the buckle 7, the buckle switch 8 is held in the on state. When the engagement between the tongue 6 and the buckle 7 is performed for wearing the seat belt, the seat belt 6 that has been pulled out is wound around the seat belt retractor 3 so that the seat belt 6 is It is attached to.
  • the release operation button of the buckle 7 Is pressed, the engagement between the latch member of the buckle 7 and the engaging portion 6a of the tongue 6 is released. Then, the tongue 6 moves together with the ejector 21 toward the tongue insertion port of the buckle 7 (leftward in FIG. 9C) by the ejector 21 biased by the spring, and the engaging portion 6a of the tongue 6 buckles. Remove from 7 tongue insertion slot. Thus, the engagement between the tongue 6 and the buckle 7 is released.
  • the pressing portion 21a of the ejector 21 contacts the first pressed portion 13e and presses the first pressed portion 13e.
  • the movable terminal 13 moves to the left as the ejector 21 moves to the left.
  • the movable contact 13 a is separated from the third fixed contact 12 b of the third fixed terminal 13, and the first guide portion 13 c of the movable contact 13 a becomes the first fixed contact 10 b of the first fixed terminal 11. Contact.
  • the 3rd fixed contact 12b will be in a free state.
  • the reverse operation of the operation of the buckle switch 8 when the tongue 6 is inserted into the buckle 7 is performed. Then, as shown in FIG.
  • the movable contact 13a comes into electrical contact with the first fixed contact 10b.
  • the first and second fixed contacts 10b and 11b are electrically connected to each other via the movable contact 13a, and the third fixed contact 12b is electrically disconnected from the first and second fixed contacts 10b and 11b.
  • the buckle switch 8 is turned off by switching from the ON circuit to the OFF circuit of the buckle switch 8 by the movable contact 13a.
  • the movable terminal 13 of the buckle switch 8 is provided with a stroke adjusting portion constituted by the first and second pressed portions 13e and 13f. Accordingly, the stroke amount of the movable contact 13a is adjusted to be constant or substantially constant corresponding to the stroke amount of the ejector 21 from the non-operating position of the ejector 21 to the position of the ejector 21 in a state where at least the latch member is engaged with the tongue. Is done. Therefore, the switch holder 9, the first to third fixed terminals 10, 11, 12, the movable contact 13a, the first and second guide portions 13c, 13d, and the shape dimensions and arrangement positions thereof are changed.
  • the buckle switch 8 can be flexibly adapted to the specifications of the buckle 7 in which the stroke amount of the ejector 21 varies. That is, even if the stroke amount of the ejector 21 varies depending on various specifications of the buckle 7, the first to third fixed terminals 10, 11, 12 and the movable contact 13a can be made common without being changed. . In this way, it is possible to flexibly cope with different stroke amounts of the ejector 1 moved by inserting the tongue 6, thereby reducing the number of manufacturing steps of the buckle switch 21 and reducing the cost of the buckle switch 21 more effectively.
  • the first to third fixed contacts 10b, 11b, and 12b have spring properties
  • the movable terminal 13 does not have spring properties, so that the first to third fixed contacts 10b, 11b, and 12b are movable.
  • the electrical contact of the terminal 13 with the movable contact 13a can be performed more stably, and the first and second pressed parts 13e and 13f are not elastically deformed, and the stroke of the stroke adjusting part of the movable terminal 13 The adjustment function can be more effectively exhibited.
  • first to third fixed contacts 10b, 11b, and 12b have a spring property
  • the longitudinal directions of the elongated first to third fixed terminal bodies 10a, 11a, and 12a are orthogonal to the tongue insertion direction.
  • it can be arranged so as to be substantially orthogonal. Thereby, the length of the tongue insertion direction of the buckle switch 21 can be further shortened.
  • first to third lead wires 14 are directly welded to the first to third fixed contacts 10b, 11b, and 12b, respectively, so that the tip ends of the first to third lead wires 14, 15, and 16 are directly welded.
  • 15, 16 and the first to third fixed contacts 10b, 11b, 12b can be reduced in connection allowance (welding allowance).
  • connection allowance welding allowance
  • the structure of the connection portion between the first to third lead wires 14, 15, 16 and the first to third fixed contacts 10b, 11b, 12b can be made compact.
  • the aforementioned connecting portion can be made more effective and compact.
  • the buckle switch 8 is fixed to the switch holder 9 in the first to third fixing directions.
  • the terminals 10, 11, 12, the movable terminal 13, and the first to third lead wires 14, 15, 16 can be integrally assembled to form a switch unit.
  • the buckle switch 8 can be easily assembled to the base of the buckle 7, and the assembling workability can be improved.
  • the first to third lead wires 14, 15, 16 are pulled when the buckle switch 8 is assembled, the first to third fixed terminals 10, 11, 12 and the first to third leads Damage to the connecting portion with the lead wires 14, 15, 16 can be prevented.
  • first to third fixed terminal bodies 10a, 11a, and 12a of the first to third fixed terminals 10, 11, and 12 are caulked to the switch holder 9 and the protrusion 18a provided on the switch holder 9 is caulked. It is attached.
  • first to third fixed terminal bodies 10a, 11a, 12a are attached to the switch holder 9 by insertion, there is a backlash caused by the insertion, so the positions of the first to third fixed contacts 10b, 11b, 12b Variation occurs.
  • the first to third fixed terminal bodies 10a, 11a, and 12a are attached to the switch holder 9 with screws, not only the number of parts increases, but also the work man-hour increases.
  • the switch holder 9 by attaching the first to third fixed terminal bodies 10a, 11a, 12a to the switch holder 9 by caulking as in this example, the first to third fixed terminals 10, 11, 12 are switched.
  • the holder 9 can be stably and firmly attached.
  • variations in the positions of the first to third fixed contacts 10b, 11b, and 12b can be suppressed, the number of parts can be reduced, and the number of work steps can be reduced.
  • the operating portion 13b of the movable terminal 13 is directly pressed (operated) by the ejector 21. Since the ejector 21 is directly stroked by the engaging portion 6a of the tongue 6 inserted into the buckle 7, the movable contact 13a can be moved more effectively. Thereby, it becomes possible to detect the engagement state of the engaging portion 6a of the tongue 6 and the latch member of the buckle 7 more stably.
  • the present invention is not limited to the examples in the above-described embodiment.
  • the ejector 21 is used as a buckle movable component that switches the buckle switch 21 on and off.
  • the tongue 6 inserted into the buckle 7 such as a latch member or a lock pin, for example.
  • Any buckle movable component can be used as long as it can move in relation to the movement of the buckle.
  • the configuration of the buckle 7 itself uses the configuration of the buckle itself described in Japanese Patent Application Laid-Open No. 2001-211912.
  • the buckle switch of the present invention has a buckle that moves when the tongue 6 is inserted. Any buckle having a movable component can be applied.
  • the buckle switch 8, the buckle 7, and the seat belt device 1 of the present invention can be variously modified within the scope described in the claims.
  • the buckle switch and the buckle according to the present invention are suitable for a buckle switch and a buckle used in a seat belt device that restrains an occupant and a belt device that restrains an operator at a construction work site, etc., which are respectively mounted on a seat of an automobile or other transportation. Can be used. Further, the seat belt device of the present invention is preferably used in a seat belt device which is mounted on a seat of an automobile or other transportation system and restrains an occupant by engagement of a tongue and a buckle supported by the seat belt. Can do.

Landscapes

  • Buckles (AREA)
  • Automotive Seat Belt Assembly (AREA)

Abstract

[Problem] To effectively reduce the number of man-hours for manufacture, as well as the cost, by flexibly corresponding to different strokes of a buckle's movable constituent member, which is moved by the insertion of a tongue. [Solution] A movable terminal (13) of a buckle switch includes a movable contact point (13a) that selectively contacts a plurality of fixed contact points of a fixed terminal having elasticity. Further, an operation section (13b) for operating the movable contact point (13a) is integrally provided with the movable contact point (13a). The operation section (13b) includes a stroke adjustment section for adjusting the stroke volume of the operation section (13b) so that the stroke volume of the movable contact point (13a) is constant or substantially constant, corresponding to the preset stroke volume (distance (L)) of an ejector (21). The stroke adjustment section includes first and second sections (13e, 13f) to be pressed by the ejector (21).

Description

バックルスイッチ、バックルおよびシートベルト装置Buckle switch, buckle and seat belt device
　本発明は、自動車その他の交通機関の座席に装備されて乗員を拘束するシートベルト装置や建築作業現場等において作業者を拘束するベルト装置に用いられているバックルの技術分野に関し、詳細には、タングとバックルとのラッチ（以下、係合ともいう）によってオン、オフ切替作動するバックルスイッチの技術分野、このバックルスイッチを備えるバックルの技術分野、およびこのバックルを備えるシートベルト装置の技術分野に関する。 TECHNICAL FIELD The present invention relates to a technical field of a buckle used in a seat belt device which is mounted on a seat of an automobile or other transportation and restrains an occupant or a belt device which restrains an operator in a construction work site. The present invention relates to a technical field of a buckle switch that is switched on and off by a latch (hereinafter also referred to as engagement) between a tongue and a buckle, a technical field of a buckle that includes the buckle switch, and a technical field of a seat belt device that includes the buckle.
　自動車を始めとする各種交通機関の座席には、衝突等の緊急時に乗員を拘束するためにシートベルト装置が配設されている。この種のシートベルト装置においては、シートベルトを容易に装着および装着解除するために、通常はバックルが設けられている。このバックルにおいては、バックルのラッチ部材がシートベルトに支持されたタングの係合部にラッチすることで、シートベルトが乗員に装着される。 Seats for various transportation facilities including automobiles are equipped with seat belt devices to restrain passengers in the event of an emergency such as a collision. In this type of seat belt device, a buckle is usually provided in order to easily attach and remove the seat belt. In this buckle, the seat belt is attached to the occupant by latching the latch member of the buckle to the engaging portion of the tongue supported by the seat belt.
　ところで、このようなバックルにおいては、タングとバックルとのラッチ状態を表示したり、タングとバックルとのラッチ状態によりリトラクタ等のシートベルト装置の他の装置やシートベルト装置の作動に関係する車載の他の装置を作動制御したりするために、タングとバックルとのラッチを検出するバックルスイッチが設けられている。 By the way, in such a buckle, the state of latching between the tongue and the buckle is displayed, or the other state of the seatbelt device such as a retractor or the operation of the seatbelt device depending on the latched state of the tongue and the buckle. In order to control the operation of other devices, a buckle switch for detecting a latch between the tongue and the buckle is provided.
　従来のバックルスイッチとして、タング挿入方向に延びかつタング挿入方向と直交方向に配設された長短尺の２つの固定接点と、各固定接点に電気的に接触しかつ摺動可能に設けられるとともにばね性（比較的柔らかい弾性）を有する可動接点とを有するバックルスイッチが知られている（例えば、特許文献１参照）。この特許文献１に記載のバックルスイッチにおいては、エジェクタにスライダが取り付けられるとともに、このスライダに可動接点が設けられる。そして、タングがバックル内に挿入されないときは、可動接点が長尺の固定接点のみに接触し、短尺の固定接点には接触しない。これにより、バックルスイッチがオフとなっている。タングがバックル内に挿入されたとき、タングの挿入にしたがってエジェクタが移動し、かつスライダがこのエジェクタの移動と一緒に直に移動することにより、可動接点がスライダとともに移動する。これにより、長短尺の固定接点が可動接点を介して電気的に導通し、バックルスイッチがオンする。したがって、タングとバックルとの係合が検出される。 As a conventional buckle switch, two long and short fixed contacts extending in the tongue insertion direction and disposed in a direction orthogonal to the tongue insertion direction, and electrically slidably provided on each fixed contact and slidable, and a spring A buckle switch having a movable contact having a property (relative soft elasticity) is known (for example, see Patent Document 1). In the buckle switch described in Patent Document 1, a slider is attached to the ejector, and a movable contact is provided on the slider. When the tongue is not inserted into the buckle, the movable contact contacts only the long fixed contact and does not contact the short fixed contact. Thereby, the buckle switch is turned off. When the tongue is inserted into the buckle, the ejector moves according to the insertion of the tongue, and the slider moves directly together with the movement of the ejector, so that the movable contact moves together with the slider. As a result, the long and short fixed contacts are electrically connected via the movable contact, and the buckle switch is turned on. Therefore, the engagement between the tongue and the buckle is detected.
　また、基板上にタング挿入方向に間隔を置いて直列に配設されたタング挿入方向に比較的長い３つの固定接点と、各固定接点に電気的に接触しかつ摺動可能に設けられるとともにばね性を有する可動接点とを有するバックルスイッチが知られている（例えば、特許文献２参照）。この特許文献２に記載のバックルスイッチにおいては、バックルに挿入されたタングの移動に連動して移動するスライダにより作動されるアクチュエータに可動接点が設けられる。そして、タングがバックル内に挿入されないときは、スライダおよびアクチュエータが非作動位置にあり、バックルのタング挿入口側の固定端子と中間の固定端子が可動接点を介して電気的に導通して、バックルスイッチがオフとなる。また、タングがバックル内に挿入されて、タングとバックルのラッチ部材とが係合した状態では、可動接点がタングの挿入と連動するスライダの移動と直に移動することで、中間の固定端子とバックルのタング挿入口側と反対側の固定端子が可動接点を介して電気的に導通してバックルスイッチがオンとなる。これにより、タングとバックルとの係合が検出される。 Also, three fixed contacts that are arranged in series on the substrate at intervals in the tongue insertion direction and that are relatively long in the tongue insertion direction, and are provided in electrical contact with and slidable with each of the fixed contacts. A buckle switch having a movable contact having a property is known (for example, refer to Patent Document 2). In the buckle switch described in Patent Document 2, a movable contact is provided on an actuator that is actuated by a slider that moves in conjunction with the movement of a tongue inserted into the buckle. When the tongue is not inserted into the buckle, the slider and the actuator are in the inoperative position, and the fixed terminal on the tongue insertion port side of the buckle and the intermediate fixed terminal are electrically connected via the movable contact, and the buckle The switch turns off. In addition, when the tongue is inserted into the buckle and the tongue and the latch member of the buckle are engaged, the movable contact moves directly with the movement of the slider interlocked with the insertion of the tongue, so that the intermediate fixed terminal and The fixed terminal on the side opposite to the tongue insertion port side of the buckle is electrically conducted through the movable contact, and the buckle switch is turned on. Thereby, the engagement between the tongue and the buckle is detected.
特開２００１－２２４４０７号公報。Japanese Patent Laid-Open No. 2001-224407. 特開２００９－２４０５２８号公報。Japanese Unexamined Patent Publication No. 2009-240528.
　ところで、バックルは、タングの挿入によって直に移動するバックル可動構成部材（特許文献１ではエジェクタ、また特許文献２ではスライダ）の非作動位置からタングとラッチ部材とのラッチ位置までのストローク（移動）量は、バックルの仕様によって種々異なる。そして、バックルスイッチがこのようなバックル可動構成部材の異なるストローク量に単に対応されて製造されると、可動接点のストローク量が変化するとともに、複数個の固定端子の設置位置が変化してしまう。このため、特許文献１および２に記載のバックルスイッチは、その全体をバックル可動構成部材の異なるストローク量に対応して製造しなければならない。しかし、バックルスイッチがバックル可動構成部材の異なるストローク量毎に製造されたのでは、バックルスイッチの製造工数が多くなるばかりでなく、バックルスイッチのコストが高くなってしまう。 By the way, the buckle is a stroke (movement) from a non-operating position of a movable movable buckle member (an ejector in Patent Document 1 or a slider in Patent Document 2) that moves directly by insertion of a tongue to a latch position of the tongue and the latch member. The amount varies depending on the buckle specifications. When the buckle switch is manufactured by simply corresponding to such different stroke amounts of the buckle movable component member, the stroke amount of the movable contact changes and the installation positions of the plurality of fixed terminals change. For this reason, the buckle switch described in Patent Documents 1 and 2 must be manufactured entirely corresponding to different stroke amounts of the buckle movable component. However, if the buckle switch is manufactured for each different stroke amount of the buckle movable component member, not only the manufacturing man-hour of the buckle switch is increased, but the cost of the buckle switch is increased.
　本発明は、このような事情に鑑みてなされたものであって、その目的は、タングの挿入により移動されるバックル可動構成部材の異なるストローク量に柔軟に対応して、製造工数を削減するとともにコストをより効果的に低減することができるバックルスイッチ、バックル、およびシートベルト装置を提供することである。 The present invention has been made in view of such circumstances, and its purpose is to flexibly cope with different stroke amounts of the movable buckle component moved by inserting the tongue, and to reduce the number of manufacturing steps. It is an object to provide a buckle switch, a buckle, and a seat belt device that can reduce costs more effectively.
　前述の課題を解決するために、本発明に係るバックルスイッチは、固定接点をそれぞれ有する複数の固定端子と、前記複数の固定端子にそれぞれ電気的に接続される複数のリード線と、前記複数の固定端子の各固定接点に接触可能でかつ前記固定接点に対して摺動可能な可動接点を有する可動端子と、バックル可動構成部材のストロークによりストロークして前記可動端子をストロークする作動部とを少なくとも備え、前記作動部が、前記バックル可動構成部材の予め設定されたストローク量に対応して前記可動接点のストローク量が一定またはほぼ一定となるように前記作動部のストローク量を調整するストローク調整部を有することを特徴としている。 In order to solve the above-described problems, a buckle switch according to the present invention includes a plurality of fixed terminals each having a fixed contact, a plurality of lead wires electrically connected to the plurality of fixed terminals, and the plurality of the plurality of fixed terminals. At least a movable terminal having a movable contact that can contact each fixed contact of the fixed terminal and that can slide with respect to the fixed contact, and an operating portion that strokes the movable terminal by a stroke of a buckle movable component member A stroke adjusting unit that adjusts a stroke amount of the movable portion so that a stroke amount of the movable contact is constant or substantially constant corresponding to a preset stroke amount of the buckle movable component member. It is characterized by having.
　また、本発明に係るバックルスイッチは、前記可動端子と前記作動部とは一体に構成されていることを特徴としている。
　更に、本発明に係るバックルスイッチは、前記作動部が細長い平板状に形成されており、前記ストローク調整部が、細長い平板状の両端部に設けられかつ前記バックル可動構成部材により択一的に押圧される第１および第２の被押圧部を有し、前記バックル可動構成部材に押圧される前記第１および第２の被押圧部の第１および第２の被押圧面間の距離が、前記バックル可動構成部材の予め設定されたストローク量に対応して設定されることを特徴としている。 Moreover, the buckle switch according to the present invention is characterized in that the movable terminal and the operating portion are integrally formed.
Further, in the buckle switch according to the present invention, the operating portion is formed in an elongated flat plate shape, and the stroke adjusting portion is provided at both ends of the elongated flat plate shape and alternatively pressed by the buckle movable component member. A distance between the first and second pressed surfaces of the first and second pressed parts pressed by the movable buckle component member, the first and second pressed parts being It is characterized in that it is set corresponding to the stroke amount set in advance of the buckle movable component.
　更に、本発明に係るバックルスイッチは、前記複数の固定端子の各固定接点が、いずれもばね性を有して前記可動接点が接触したとき弾性的に撓むことを特徴としている。
　更に、本発明に係るバックルスイッチは、前記複数の固定端子がいずれも細長い帯板状に形成されているとともに、それぞれ前記バックル可動構成部材のストローク方向に所定の間隔を置きかつ長手方向が前記バックル可動構成部材のストローク方向と直交またはほぼ直交する方向に配設されていることを特徴としている。 Furthermore, the buckle switch according to the present invention is characterized in that each of the fixed contacts of the plurality of fixed terminals has a spring property and is elastically bent when the movable contact comes into contact.
Further, in the buckle switch according to the present invention, each of the plurality of fixed terminals is formed in an elongated strip shape, and a predetermined interval is provided in the stroke direction of the buckle movable component, and the longitudinal direction is the buckle. It is characterized by being arranged in a direction orthogonal or substantially orthogonal to the stroke direction of the movable component member.
　更に、本発明に係るバックルスイッチは、前記複数のリード線が、それぞれ対応する前記複数の固定端子に溶接により接続されることを特徴としている。
　更に、本発明に係るバックルスイッチは、固定端子取付部およびハーネス取付部が一体に設けられたスイッチホルダを有し、前記固定端子取付部に前記複数の固定端子が取り付けられるとともに、前記ハーネス取付部に前記複数のリード線のハーネスが取り付けられることを特徴としている。
　更に、本発明に係るバックルスイッチは、前記複数の固定端子がいずれも前記スイッチホルダに、前記スイッチホルダの前記固定端子取付部をかしめることで取り付けられることを特徴としている。 Furthermore, the buckle switch according to the present invention is characterized in that the plurality of lead wires are connected to the corresponding fixed terminals by welding.
Furthermore, the buckle switch according to the present invention has a switch holder in which a fixed terminal mounting portion and a harness mounting portion are provided integrally, and the plurality of fixed terminals are mounted on the fixed terminal mounting portion, and the harness mounting portion A plurality of lead wire harnesses are attached to the head.
Furthermore, the buckle switch according to the present invention is characterized in that the plurality of fixed terminals are all attached to the switch holder by caulking the fixed terminal attaching portion of the switch holder.
　一方、本発明に係るバックルは、両側壁を有するベースと、前記両側壁に、タングが挿入されないときに位置する非作動位置と前記タングをラッチする作動位置との間で移動可能に支持されるラッチ部材と、前記ベースに、前記タングが挿入されないときに位置する非作動位置と前記タングが前記ラッチ部材にラッチされたときに位置する作動位置との間で移動可能に設けられ、前記タングがタング挿入口から挿入されることによって前記作動位置へ移動するとともに、前記タングを前記タング挿入口の方へ常時付勢するエジェクタと、前記タングと前記ラッチ部材とのラッチを解除するための解除操作部材と、前記タングと前記ラッチ部材とのラッチを検出するバックルスイッチとを少なくとも備え、前記バックルスイッチが、前述の本発明のバックルスイッチのいずれか１つであることを特徴としている。
　また、本発明に係るバックルは、前記バックル可動構成部材が前記エジェクタであることを特徴としている。 On the other hand, the buckle according to the present invention is supported movably between a base having both side walls and a non-operating position where the tongue is not inserted and an operating position where the tongue is latched on the both side walls. The latch member and the base are provided movably between a non-actuated position located when the tongue is not inserted and an actuated position located when the tongue is latched by the latch member, An ejector that moves to the operating position by being inserted from a tongue insertion port and constantly urges the tongue toward the tongue insertion port, and a release operation for releasing the latch between the tongue and the latch member At least a member and a buckle switch that detects latching between the tongue and the latch member. It is characterized in that any one of the buckle switch.
The buckle according to the present invention is characterized in that the buckle movable component is the ejector.
　更に、本発明に係るシートベルト装置は、シートベルトを巻き取るシートベルトリトラクタと、シートベルトに摺動可能に支持されたタングと、車体に設けられるとともに前記タングが係脱可能に係合されるバックルとを少なくとも備え、前記バックルが前述の本発明のバックルのいずれか１つであることを特徴としている。 Further, the seat belt device according to the present invention includes a seat belt retractor that winds up the seat belt, a tongue that is slidably supported by the seat belt, and a tongue that is provided on the vehicle body and is detachably engaged. A buckle, wherein the buckle is any one of the buckles of the present invention described above.
　このように構成された本発明に係るバックルスイッチ、バックル、およびシートベルト装置によれば、バックルスイッチの可動端子にストローク調整部が配設される。これにより、タングの挿入によってバックル可動構成部材の非作動位置から少なくともラッチ部材がタングと係合した状態でのバックル可動構成部材の位置までのバックル可動構成部材のストローク量に対応して可動接点のストローク量が一定またはほぼ一定に調整される。したがって、スイッチ部の形状寸法および配設位置を変更することなく、バックルスイッチをバックル可動構成部材のストローク量が種々異なるバックルの仕様に柔軟に対応させることができる。すなわち、バックルの種々の仕様によりバックル可動構成部材のストローク量が種々異なっても、複数の固定端子および可動接点を変更させることなく共通にすることが可能となる。こうして、タングの挿入により移動されるバックル可動構成部材の異なるストローク量に柔軟に対応して、バックルスイッチの製造工数を削減するとともに、バックルスイッチのコストをより効果的に低減することができる According to the buckle switch, the buckle, and the seat belt device according to the present invention configured as described above, the stroke adjusting unit is disposed on the movable terminal of the buckle switch. Accordingly, the movable contact of the movable contact member corresponding to the stroke amount of the movable buckle member from the non-actuated position of the movable movable buckle member to the position of the movable buckle member in the state where the latch member is engaged with the tongue by inserting the tongue is provided. The stroke amount is adjusted to be constant or almost constant. Therefore, the buckle switch can be flexibly adapted to the specifications of the buckle with different stroke amounts of the movable buckle component without changing the shape and arrangement position of the switch portion. That is, even if the stroke amount of the buckle movable component varies depending on various specifications of the buckle, it is possible to make the plurality of fixed terminals and movable contacts common without changing them. In this way, it is possible to flexibly cope with different stroke amounts of the buckle movable component moved by the insertion of the tongue, thereby reducing the manufacturing steps of the buckle switch and reducing the cost of the buckle switch more effectively.
　特に、複数の固定接点がいずれもばね性を有し、また、可動端子がばね性を有しないことで、各固定接点と可動端子の可動接点との電気的接触をより一層安定して行うことができるとともに、可動端子の作動部が弾性変形しなく、可動端子のストローク調整部のストローク調整機能をより一層効果的に発揮させることが可能となる。 In particular, since the plurality of fixed contacts all have spring properties and the movable terminal does not have spring properties, electrical contact between each fixed contact and the movable contact of the movable terminal can be performed more stably. In addition, the operating portion of the movable terminal is not elastically deformed, and the stroke adjusting function of the stroke adjusting portion of the movable terminal can be more effectively exhibited.
　また、各固定接点がばね性を有することで、各固定接点が比較的短くなる。これにより、複数の固定端子が各固定接点の延設方向（タング挿入方向）と直交またはほぼ直交する方向に細長くなる。そして、複数の固定端子を、それらの長手方向がタング挿入方向と直交またはほぼ直交する方向となるように配設させることにより、バックルスイッチのタング挿入方向の長さをより短くすることができる。 Also, since each fixed contact has a spring property, each fixed contact becomes relatively short. As a result, the plurality of fixed terminals are elongated in a direction orthogonal or substantially orthogonal to the extending direction (tang insertion direction) of each fixed contact. Then, the length of the buckle switch in the tongue insertion direction can be further shortened by arranging the plurality of fixed terminals so that their longitudinal directions are orthogonal or substantially orthogonal to the tongue insertion direction.
　更に、複数のリード線の先端部を、それぞれ対応する固定接点に直接溶接することで、溶接代が比較的小さいため複数のリード線と対応する固定接点との接続代を小さくすることが可能となる。これにより、各リード線と各固定接点との接続部との構造をコンパクトにすることが可能となる。特に、溶接に溶接代が小さいスポット溶接を用いることで、前述の接続部をより効果的にコンパクトにすることができる。 Furthermore, by directly welding the tip portions of a plurality of lead wires to the corresponding fixed contacts, the welding allowance is relatively small, so the connection allowance between the plurality of lead wires and the corresponding fixed contact can be reduced. Become. Thereby, it becomes possible to make the structure of the connection part of each lead wire and each fixed contact compact. In particular, by using spot welding with a small welding allowance for welding, the aforementioned connecting portion can be made more effective and compact.
　更に、スイッチホルダに、固定端子取付部およびハーネス固定支持部を一体に設けている。これにより、スイッチホルダに複数の固定端子、可動端子、および複数のリード線を一体的に組み付けることで、バックルスイッチをスイッチユニットして構成することができる。これにより、バックルスイッチを、バックルのベース等に簡単に組み付けることが可能となり、バックルスイッチの組付け作業性を向上させることができる。しかも、バックルスイッチの組付け時等に各リード線が引っ張られても、各固定端子と各リード線との接続部がダメージを受けることを抑制することができる。 Furthermore, a fixed terminal mounting portion and a harness fixing support portion are integrally provided on the switch holder. Thus, the buckle switch can be configured as a switch unit by integrally assembling the plurality of fixed terminals, the movable terminals, and the plurality of lead wires to the switch holder. Thereby, the buckle switch can be easily assembled to the base of the buckle and the like, and the assembling workability of the buckle switch can be improved. Moreover, even if each lead wire is pulled when the buckle switch is assembled or the like, it is possible to suppress damage to the connection portion between each fixed terminal and each lead wire.
　更に、各固定端子の固定端子本体をスイッチホルダに、このスイッチホルダをかしめることで取り付けることにより、各固定端子をスイッチホルダに、安定してより堅固に取り付けることができる。これにより、各固定接点の位置のばらつきを抑制することができるとともに、部品点数を低減でき、かつ作業工数を削減することができる。 Furthermore, each fixed terminal can be stably and firmly attached to the switch holder by attaching the fixed terminal body of each fixed terminal to the switch holder by caulking the switch holder. Thereby, while being able to suppress the dispersion | variation in the position of each fixed contact, a number of parts can be reduced and an operation man-hour can be reduced.
　更に、バックル可動構成部材としてエジェクタを用いることで、可動端子の作動部をエジェクタで直接押圧（作動）することが可能となる。エジェクタはバックル内に挿入されるタングの係合部で押圧されて直接ストロークするので、可動接点をより効果的移動させることができる。これにより、タングの係合部とバックルのラッチ部材との係合状態をより安定して検出することが可能となる。 Furthermore, by using an ejector as the buckle movable component member, it becomes possible to directly press (actuate) the operating portion of the movable terminal with the ejector. Since the ejector is pressed by the engaging portion of the tongue inserted into the buckle and directly strokes, the movable contact can be moved more effectively. As a result, it is possible to more stably detect the engagement state between the engagement portion of the tongue and the latch member of the buckle.
本発明に係るシートベルト装置の実施の形態の一例を模式的に示す図である。It is a figure showing typically an example of an embodiment of a seatbelt device concerning the present invention. （Ａ）は本発明に係るバックルの実施の形態の一例を示す斜視図、（Ｂ）は（Ａ）に示す例のバックルを、タングが挿入係合されたで示す斜視図である。(A) is a perspective view which shows an example of embodiment of the buckle which concerns on this invention, (B) is a perspective view which shows the buckle of the example shown to (A) in which the tongue was inserted and engaged. 図２に示す例のバックルに用いられるバックルスイッチを示す斜視図である。It is a perspective view which shows the buckle switch used for the buckle of the example shown in FIG. （Ａ）は図３に示すバックルスイッチの正面図、（Ｂ）は同バックルスイッチの上面図（Ｃ）は同バックルスイッチの下面図、同（Ｄ）はバックルスイッチの右側面図である。(A) is a front view of the buckle switch shown in FIG. 3, (B) is a top view of the buckle switch, (C) is a bottom view of the buckle switch, and (D) is a right side view of the buckle switch. 図４（Ｄ）においてバックルスイッチをV方向から見た図である。It is the figure which looked at the buckle switch from V direction in FIG.4 (D). （Ａ）ないし（Ｃ）は、それぞれ図３に示すバックルスイッチの固定端子の斜視図である(A) thru | or (C) is a perspective view of the fixing terminal of the buckle switch shown in FIG. 3, respectively. （Ａ）は固定端子がスイッチホルダにかしめられる前の状態を示す図、（Ｂ）は固定端子がスイッチホルダにかしめられた後の状態を示す図、（Ｃ）は（Ａ）におけるVIIC－VIIC線に沿う断面図、（Ｄ）は（Ｂ）におけるVIID－VIID線に沿う断面図である。(A) is a diagram showing a state before the fixed terminal is crimped to the switch holder, (B) is a diagram showing a state after the fixed terminal is crimped to the switch holder, and (C) is a VIIC-VIIC in (A). (D) is a sectional view taken along the line VIID-VIID in (B). 図３に示す例のバックルスイッチの可動端子とエジェクタの一部とを示す図である。It is a figure which shows the movable terminal and part of ejector of the buckle switch of the example shown in FIG. （Ａ）ないし（Ｃ）は図３に示す例のバックルスイッチの作動を説明する図である。(A) thru | or (C) is a figure explaining the action | operation of the buckle switch of the example shown in FIG.
　以下、図面を用いて本発明を実施するための形態について説明する。
　図１は本発明に係るシートベルト装置の実施の形態の一例を模式的に示す図である。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a diagram schematically showing an example of an embodiment of a seat belt device according to the present invention.
　図１に示すように、この例のシートベルト装置１は、基本的には従来公知の三点式シートベルト装置と同じである。図中、１はシートベルト装置、２は車両シート、３は車両シート２の近傍に配設されたシートベルトリトラクタ、４はシートベルトリトラクタ３に引き出し可能に巻き取られかつ先端のベルトアンカー４ａが車体の床あるいは車両シート２に固定されるシートベルト、５はシートベルトリトラクタ３から引き出されたシートベルト４を乗員のショルダーの方へガイドするガイドアンカー、６はこのガイドアンカー５からガイドされてきたシートベルト４に摺動自在に支持されかつ係合部６ａを有するタング、７は車体の床あるいは車両シートに固定されかつタング６の係合部６ａが係脱可能に挿入係合されるバックルである。
　このシートベルト装置１におけるシートベルト４の装着操作および装着解除操作も、従来公知のシートベルト装置と同じである。 As shown in FIG. 1, the seat belt device 1 of this example is basically the same as a conventionally known three-point seat belt device. In the figure, 1 is a seat belt device, 2 is a vehicle seat, 3 is a seat belt retractor disposed in the vicinity of the vehicle seat 2, 4 is retractably wound on the seat belt retractor 3, and a belt anchor 4 a at the tip is A seat belt fixed to the floor of the vehicle body or the vehicle seat 2, 5 is a guide anchor that guides the seat belt 4 pulled out from the seat belt retractor 3 toward the occupant's shoulder, and 6 is guided from this guide anchor 5. A tongue that is slidably supported by the seat belt 4 and has an engaging portion 6a, and 7 is a buckle that is fixed to the floor of the vehicle body or a vehicle seat and that the engaging portion 6a of the tongue 6 is detachably inserted and engaged. is there.
The seatbelt 4 mounting operation and mounting release operation in the seatbelt apparatus 1 are the same as those of a conventionally known seatbelt apparatus.
　そして、シートベルト４の非装着時では、タング６がバックル７に係合されず、シートベルト４はその全量（巻取り可能な量）をシートベルトリトラクタ３の従来公知のスプール（不図示）に巻き取られている。また、図１に示すシートベルト４の乗員への装着時では、シートベルト４はシートベルトリトラクタ３から所定量引き出されて、タング６がバックル７に係合される。その後、タング６から手を放すと、余分に引き出されたシートベルト４はシートベルトリトラクタ３のスプールに巻き取られる。こうして、シートベルト４が乗員に装着される。 When the seat belt 4 is not attached, the tongue 6 is not engaged with the buckle 7, and the seat belt 4 has its entire amount (the amount that can be wound up) stored in a conventionally known spool (not shown) of the seat belt retractor 3. It is wound up. Further, when the seat belt 4 shown in FIG. 1 is attached to the occupant, the seat belt 4 is pulled out from the seat belt retractor 3 by a predetermined amount, and the tongue 6 is engaged with the buckle 7. Thereafter, when the hand is released from the tongue 6, the excessively drawn seat belt 4 is wound on the spool of the seat belt retractor 3. Thus, the seat belt 4 is attached to the occupant.
　図２（Ａ）は本発明に係るバックルの実施の形態の一例を示す斜視図、図２（Ｂ）は図２（Ａ）に示す例のバックルを、タングが挿入係合されたで示す斜視図である。なお、図２（Ａ）および（Ｂ）には、いずれもバックルの内部が示されていないが、この実施の形態のバックルはバックルスイッチの構造およびバックルスイッチによるラッチ検出方法が異なるだけであり、バックル自体の構成およびバックル自体の動作は特開２００１－２１１９１２号公報に記載されているバックルと実質的に同じである。 2A is a perspective view showing an example of an embodiment of a buckle according to the present invention, and FIG. 2B is a perspective view showing the buckle of the example shown in FIG. 2A with a tongue inserted and engaged. FIG. 2A and 2B do not show the inside of the buckle, the buckle of this embodiment is different only in the structure of the buckle switch and the latch detection method by the buckle switch. The configuration of the buckle itself and the operation of the buckle itself are substantially the same as the buckle described in JP-A-2001-211912.
　すなわち、この例のバックル７は、特開２００１－２１１９１２号公報に記載されている、両側壁と底部とを有するＵ字状フレームからなるベースと、タングにラッチ可能なラッチ部材と、ラッチ部材のラッチ解除方向の移動を阻止するロックピンと、ラッチ部材のラッチ解除操作を行う解除操作ボタンと、タングをバックルから離脱させる方向に付勢可能なエジェクタと、ロックピンを保持するスライダと、アッパーカバーおよびロアカバーと、ラッチ部材、操作ボタン、およびエジェクタをそれぞれ非作動位置に付勢する各スプリングとを少なくとも備えている。 That is, the buckle 7 of this example includes a base formed of a U-shaped frame having both side walls and a bottom, a latch member that can be latched to a tongue, and a latch member described in JP-A-2001-211912. A lock pin that prevents movement in the latch release direction, a release operation button that performs a latch release operation of the latch member, an ejector that can be biased in a direction to release the tongue from the buckle, a slider that holds the lock pin, an upper cover, and The lower cover and at least the latch member, the operation button, and each spring for urging the ejector to the inoperative position are provided.
　したがって、本発明のバックル自体の構成およびバックル自体の動作は、前述の特開２００１－２１１９１２号公報に記載されているバックルと同じでありこの公開公報を参照すれば理解できるので、それらの説明は省略する。
　図２（Ａ）および（Ｂ）に示すように、この例のバックル７は、バックルスイッチ８を備えている。 Therefore, the configuration of the buckle itself and the operation of the buckle itself of the present invention are the same as the buckle described in the above-mentioned Japanese Patent Application Laid-Open No. 2001-211912, and can be understood by referring to this publication. Omitted.
As shown in FIGS. 2A and 2B, the buckle 7 of this example includes a buckle switch 8.
　図３はこの例のバックルスイッチを示す斜視図、図４（Ａ）はバックルスイッチの正面図、図４（Ｂ）はバックルスイッチの上面図、図４（Ｃ）はバックルスイッチの下面図、図４（Ｄ）はバックルスイッチの右側面図、および図５は図４（Ｄ）においてバックルスイッチをV方向から見た図である。 3 is a perspective view showing the buckle switch of this example, FIG. 4A is a front view of the buckle switch, FIG. 4B is a top view of the buckle switch, and FIG. 4C is a bottom view of the buckle switch. 4 (D) is a right side view of the buckle switch, and FIG. 5 is a view of the buckle switch viewed from the V direction in FIG. 4 (D).
　図３、図４（Ａ）ないし（Ｄ）、および図５に示すように、この例のバックルスイッチ８は、絶縁性のスイッチホルダ９、３個の導電性の第１ないし第３の固定端子１０,１１,１２、１個の導電性の可動端子１３、３本の導電性の第１ないし第３のリード線１４,１５,１６を束ねたハーネス１７を有している。 As shown in FIGS. 3, 4 (A) to (D), and FIG. 5, the buckle switch 8 of this example includes an insulating switch holder 9 and three conductive first to third fixed terminals. 10, 11, 12, a conductive movable terminal 13, and a harness 17 in which three conductive first to third lead wires 14, 15, 16 are bundled.
　スイッチホルダ９は例えば樹脂等から形成されている。そして、このスイッチホルダ９は、第１ないし第３の固定端子１０,１１,１２を取り付ける固定端子取付部１８、可動端子１３を取り付ける可動端子取付部１９、および第１ないし第３のリード線１４,１５,１６のハーネス１７を固定支持するハーネス固定支持部２０を有している。 The switch holder 9 is made of, for example, resin. The switch holder 9 includes a fixed terminal mounting portion 18 for mounting the first to third fixed terminals 10, 11, 12, a movable terminal mounting portion 19 for mounting the movable terminal 13, and the first to third lead wires 14. , 15, 16 has a harness fixing support portion 20 for fixing and supporting the harness 17.
　図６（Ａ）ないし（Ｃ）に示すように、第１ないし第３の固定端子１０,１１,１２は、それぞれ、固定端子取付部１８に固定される細長くかつ薄い帯板状の第１ないし第３の固定端子本体１０ａ,１１ａ,１２ａ、および第１ないし第３の固定端子本体１０ａ,１１ａ,１２ａから延設される第１ないし第３の固定接点１０ｂ,１１ｂ,１２ｂを有している。第１ないし第３の固定端子本体１０ａ,１１ａ,１２ａおよび第１ないし第３の固定接点１０ｂ,１１ｂ,１２ｂは、いずれもばね性（比較的柔らかい弾性）を有する単一材料から形成されていて、第１ないし第３の固定接点１０ｂ,１１ｂ,１２ｂは弾性的に撓み可能とされている。 As shown in FIGS. 6A to 6C, the first to third fixed terminals 10, 11, and 12 are elongated and thin strip-shaped first to third fixed terminals fixed to the fixed terminal mounting portion 18, respectively. The third fixed terminal body 10a, 11a, 12a and the first to third fixed contact points 10b, 11b, 12b extending from the first to third fixed terminal bodies 10a, 11a, 12a are provided. . The first to third fixed terminal bodies 10a, 11a, 12a and the first to third fixed contacts 10b, 11b, 12b are all formed from a single material having spring properties (relatively soft elasticity). The first to third fixed contacts 10b, 11b, and 12b are elastically deflectable.
　その場合、第１の固定接点１０ｂは、第１の固定端子本体１０ａの図６（Ａ）において右端縁（タング挿入方向下流側端縁）からタング挿入方向に延びた後、タング挿入方向と逆方向に湾曲状に曲げ返され、更にタング挿入方向と逆方向に進むにしたがって第１の固定端子本体１０ａから離間するように傾斜して設けられる。更に、第１の固定接点１０ｂの先端部は、略Ｕ字状に湾曲して形成されかつ可動端子１３が電気的に接触可能な第１の接点部１０ｂ1とされている。そして、第１の固定接点１０ｂは、可動端子１３が第１の接点部１０ｂ1に接触したときは、弾性的に撓むようになる。更に、第１の固定接点１０ｂは、その途中から先端まで切断αされて２分割構成にされている。したがって、第１の接点部１０ｂ1は、２分割された一方の接点部と他方の接点部とが互いに独立して弾性的に撓み可能とされている。これにより、可動端子１３が第１の接点部１０ｂ1の２分割された２つの接点部に独立して接触可能となり、可動端子１３は第１の接点部１０ｂ1に安定して接触するようになる。 In this case, the first fixed contact 10b extends in the tongue insertion direction from the right edge (downstream edge in the tongue insertion direction) in FIG. 6A of the first fixed terminal body 10a, and then reverse to the tongue insertion direction. It is bent so as to be bent in the direction and further inclined so as to be separated from the first fixed terminal body 10a as it advances in the direction opposite to the tongue insertion direction. Further, the tip end portion of the first fixed contact 10b is formed as a first contact portion 10b 1 which is formed in a substantially U-shape and can be electrically contacted with the movable terminal 13. The first fixed contact 10b when the movable terminal 13 is in contact with the first contact portion 10b 1 is as resiliently flexible. Further, the first fixed contact 10b is cut α from the middle to the tip thereof to be divided into two parts. Accordingly, the first contact portion 10b 1 is configured such that one of the two contact portions and the other contact portion can be elastically bent independently of each other. As a result, the movable terminal 13 can independently come into contact with the two divided contact portions of the first contact portion 10b 1 so that the movable terminal 13 can stably contact the first contact portion 10b 1. Become.
　また、第２の固定接点１１ｂは第１の固定接点１０ｂとまったく同じに形成され、第１の接点部１０ｂ1と同様の２分割された第２の接点部１１ｂ1を有している。更に、第３の固定接点１２ｂは第１および第２の固定接点１０ｂ,１１ｂと図６（Ａ）ないし（Ｃ）において左右対称に設けられるだけであり、第３の固定接点１２ｂの他の構成は第１および第２の固定接点１０ｂ,１１ｂと同じに形成される。したがって、第３の固定接点１２ｂは、第１および第２の接点部１０ｂ1,１１ｂ1と同様の２分割された第３の接点部１２ｂ1を有している。 The second fixed contact 11b is formed exactly the same as the first fixed contact 10b, and has a second contact portion 11b 1 divided into two, which is the same as the first contact portion 10b 1 . Further, the third fixed contact 12b is only provided symmetrically with the first and second fixed contacts 10b and 11b in FIGS. 6A to 6C, and other configurations of the third fixed contact 12b. Is formed in the same manner as the first and second fixed contacts 10b and 11b. Therefore, the third fixed contact 12b has a third contact portion 12b 1 divided into two, which is the same as the first and second contact portions 10b 1 and 11b 1 .
　この例のバックルスイッチ８では、第１ないし第３の固定端子１０,１１,１２は次のようにしてスイッチホルダ９の固定端子取付部１８に取り付けられる。すなわち、図７（Ａ）および（Ｃ）に示すように第１ないし第３の固定端子１０,１１,１２に、それぞれ同じ大きさの取付孔１０ｃ,１１ｃ,１２ｃが一対設けられる。また、固定端子取付部１８の各取付孔１０ｃ,１１ｃ,１２ｃに対応する位置に、それぞれ、各取付孔１０ｃ,１１ｃ,１２ｃを貫通可能な突起１８ａが設けられる。そして、図７（Ｂ）および（Ｄ）に示すように各突起１８ａが超音波により加圧されてかしめられることで、第１ないし第３の固定端子１０,１１,１２が固定端子取付部１８に取り付けられる。 In the buckle switch 8 of this example, the first to third fixed terminals 10, 11, and 12 are attached to the fixed terminal attaching portion 18 of the switch holder 9 as follows. That is, as shown in FIGS. 7A and 7C, a pair of mounting holes 10c, 11c, and 12c having the same size are provided in the first to third fixed terminals 10, 11, and 12, respectively. In addition, at positions corresponding to the mounting holes 10c, 11c, and 12c of the fixed terminal mounting portion 18, projections 18a that can penetrate the mounting holes 10c, 11c, and 12c are provided, respectively. Then, as shown in FIGS. 7B and 7D, the projections 18a are pressurized and caulked by ultrasonic waves, whereby the first to third fixed terminals 10, 11, and 12 are fixed to the fixed terminal mounting portion 18. Attached to.
　そして、第１ないし第３の固定端子１０,１１,１２は、スイッチホルダ９の固定端子取付部１８に、バックル７のエジェクタ２１（後述の図８に図示；本発明のバックル可動構成部材に相当）の移動方向に沿って所定間隔をおいて配設されるとともに、互いに電気的に絶縁されて移動不能に取り付けられている。その場合、第１ないし第３の固定端子１０,１１,１２は、第１ないし第３の固定端子本体１０ａ,１１ａ,１２ａの長手方向がタング挿入方向と直交またはほぼ直交する方向となるように配設される。また、第１ないし第３の固定端子１０,１１,１２は、バックル７のタング挿入側（図４（Ａ）において左側）からこれらの順に配設される。 The first to third fixed terminals 10, 11, 12 are connected to the fixed terminal mounting portion 18 of the switch holder 9, the ejector 21 of the buckle 7 (shown in FIG. 8 described later; corresponding to the movable buckle component of the present invention). ) Are disposed at predetermined intervals along the movement direction, and are electrically insulated from each other and attached so as not to move. In this case, the first to third fixed terminals 10, 11, and 12 are arranged so that the longitudinal direction of the first to third fixed terminal bodies 10 a, 11 a, and 12 a is orthogonal to or substantially orthogonal to the tongue insertion direction. Arranged. The first to third fixed terminals 10, 11, and 12 are arranged in this order from the tongue insertion side (left side in FIG. 4A) of the buckle 7.
　可動端子１３は、スイッチホルダ９の可動端子取付部１９に、エジェクタ２１の移動方向に摺動可能に配設されている。図８に示すように、可動端子１３は、エジェクタ２１の移動方向に比較的細長い平板状の可動接点１３ａと、可動端子１３に一体に設けられてこの可動端子１３をストローク（移動）させかつエジェクタ２１の移動方向に比較的細長い平板状の作動部１３ｂとを有している。これらの可動接点１３ａおよび作動部１３ｂはそれらの長手方向中央部で互いに連結されてほぼＨ字状に形成されている。なお、作動部１３ｂは可動端子１３と別体に設けることもでき、この場合には作動部１３ｂは可動端子１３の構成部材を構成しない。 The movable terminal 13 is disposed on the movable terminal mounting portion 19 of the switch holder 9 so as to be slidable in the moving direction of the ejector 21. As shown in FIG. 8, the movable terminal 13 is provided integrally with the movable terminal 13 that is relatively long and flat in the moving direction of the ejector 21, and strokes (moves) the movable terminal 13. 21 has a plate-like operating portion 13b that is relatively elongated in the moving direction. The movable contact 13a and the actuating portion 13b are connected to each other at the center in the longitudinal direction, and are formed in a substantially H shape. In addition, the action | operation part 13b can also be provided separately from the movable terminal 13, and the action | operation part 13b does not comprise the structural member of the movable terminal 13 in this case.
　可動接点１３ａは第１ないし第３の固定接点１０ｂ,１１ｂ,１２ｂの第１ないし第３の接点部１０ｂ1,１１ｂ1,１２ｂ1に接触可能とされている。また、可動接点１３ａの両端部は第１ないし第３の接点部１０ｂ1,１１ｂ1,１２ｂ1の接触面と反対側に傾斜するように折り曲げられた第１および第２のガイド部１３ｃ,１３ｄとされている。これらの第１および第２のガイド部１３ｃ,１３ｄにより、可動接点１３ａが第１ないし第３の接点部１０ｂ1,１１ｂ1,１２ｂ1に滑らかに安定して接触可能とされている。更に、作動部１３ｂの両端部は、第１および第２のガイド部１３ｃ,１３ｄと同じ側に直角またはほぼ直角に折り曲げられた第１および第２の被押圧部１３ｅ,１３ｆとされている。バックルスイッチ８を有するバックル７が組み立てられた状態では、バックル７のエジェクタ２１に一体に突設された押圧部２１ａが第１および第２の被押圧部１３ｅ,１３ｆの間に位置するようにされている。そして、エジェクタ２１がタング挿入方向と反対方向（図８において左方）に移動するとき、押圧部２１ａがエジェクタ２１の移動とともに移動して押圧部２１ａの図８において左端が第１の被押圧部１３ｅに当接した後、可動端子１３はエジェクタ２１とともに一体に移動可能とされている、また、エジェクタ２１はタング挿入方向（図８において右方）に移動するとき、押圧部２１ａがエジェクタ２１の移動とともに移動して押圧部２１ａの図８において右端が第２の被押圧部１３ｆに当接した後、可動端子１３はエジェクタ２１とともに同方向に一体に移動可能とされている。 The movable contact 13a is contactable first to third fixed contacts 10b, 11b, the contact portions 10b 1, 11b 1, 12b 1 first to third of 12b. Further, the first and second guide portions 13c and 13d are bent at both ends of the movable contact 13a so as to be inclined to the opposite side to the contact surfaces of the first to third contact portions 10b 1 , 11b 1 and 12b 1. It is said that. By these first and second guide portions 13c and 13d, the movable contact 13a can smoothly and stably contact the first to third contact portions 10b 1 , 11b 1 and 12b 1 . Further, both end portions of the actuating portion 13b are first and second pressed portions 13e and 13f which are bent at right angles or substantially right angles to the same side as the first and second guide portions 13c and 13d. In a state where the buckle 7 having the buckle switch 8 is assembled, the pressing portion 21a that is integrally projected on the ejector 21 of the buckle 7 is positioned between the first and second pressed portions 13e and 13f. ing. When the ejector 21 moves in the direction opposite to the tongue insertion direction (leftward in FIG. 8), the pressing portion 21a moves with the movement of the ejector 21, and the left end of the pressing portion 21a in FIG. 8 is the first pressed portion. After contact with 13e, the movable terminal 13 can be moved together with the ejector 21, and when the ejector 21 moves in the tongue insertion direction (rightward in FIG. 8), the pressing portion 21a of the ejector 21 The movable terminal 13 is movable together with the ejector 21 in the same direction after moving and moving so that the right end of the pressing portion 21a in FIG. 8 contacts the second pressed portion 13f.
　そして、このように構成されているバックルスイッチ８では、第１の被押圧部１３ｅの位置が、図８に例えば一点鎖線で示すように所定の範囲で折り曲げ位置を変更するだけで任意に設定変更可能である。また、第２の被押圧部１３ｆの位置も、図８に例えば二点鎖線で示すように所定の範囲で折り曲げ位置を変更するだけで任意に設定変更可能である。これにより、第１および第２の被押圧部１３ｅ,１３ｆの位置の少なくとも一方を変更することで、第１および第２の被押圧部１３ｅ,１３ｆの対向面間の距離Ｌが所定の範囲で任意に設定可能となっている。 In the buckle switch 8 configured as described above, the position of the first pressed portion 13e can be arbitrarily changed by simply changing the folding position within a predetermined range as shown by a one-dot chain line in FIG. Is possible. Further, the position of the second pressed portion 13f can be arbitrarily changed by simply changing the folding position within a predetermined range as shown by a two-dot chain line in FIG. Thus, by changing at least one of the positions of the first and second pressed parts 13e and 13f, the distance L between the facing surfaces of the first and second pressed parts 13e and 13f is within a predetermined range. It can be set arbitrarily.
　ところで、前述のようにバックル７のエジェクタ２１のストローク量は、バックル７の仕様によって種々異なる。このため、エジェクタ２１によって作動されるバックルスイッチ８の全体がエジェクタ２１の異なるストローク量によって種々製造されると、可動接点１３のストローク量が変化するとともに、第１ないし第３の固定端子１０,１１,１２の設置位置が変化し、その結果、スイッチホルダ９も変化してしまう。このため、バックル７の仕様で、バックル７の製造工数が多くなるばかりでなく、バックル７のコストが高くなる。 Incidentally, as described above, the stroke amount of the ejector 21 of the buckle 7 varies depending on the specifications of the buckle 7. Therefore, when the entire buckle switch 8 actuated by the ejector 21 is manufactured with various stroke amounts of the ejector 21, the stroke amount of the movable contact 13 changes and the first to third fixed terminals 10, 11 are changed. , 12 change, and as a result, the switch holder 9 also changes. For this reason, in the specification of the buckle 7, not only the manufacturing man-hour of the buckle 7 increases, but also the cost of the buckle 7 increases.
　そこで、この例のバックルスイッチ８の可動端子１３では、前述のように第１および第２の被押圧部１３ｅ,１３ｆの位置の少なくとも一方を変更することで、第１および第２の被押圧部１３ｅ,１３ｆの対向面間の距離Ｌがバックル７の仕様に応じたエジェクタ２１のストローク量に対応した大きさに調整される。これにより、この例のバックルスイッチ８は、スイッチホルダ９、第１ないし第３の固定端子１０,１１,１２、可動接点１３ａ、第１および第２のガイド部１３ｃ,１３ｄ、および、これらの形状寸法および配設位置、つまりバックルスイッチ８のスイッチ部の形状寸法および配設位置が変更されることなく、エジェクタ２１のストロークが種々異なるバックル７の仕様に柔軟に対応可能となっている。 Therefore, in the movable terminal 13 of the buckle switch 8 of this example, the first and second pressed parts are changed by changing at least one of the positions of the first and second pressed parts 13e and 13f as described above. The distance L between the facing surfaces 13e and 13f is adjusted to a size corresponding to the stroke amount of the ejector 21 according to the specifications of the buckle 7. Thereby, the buckle switch 8 of this example includes the switch holder 9, the first to third fixed terminals 10, 11, 12, the movable contact 13a, the first and second guide portions 13c, 13d, and their shapes. Without changing the dimensions and arrangement position, that is, the shape and arrangement position of the switch portion of the buckle switch 8, the stroke of the ejector 21 can be flexibly adapted to the specifications of the buckle 7.
　このように、作動部１３ｂの第１および第２の被押圧部１３ｅ,１３ｆは、エジェクタ２１の非作動位置から少なくともラッチ部材がタング６と係合した状態でのエジェクタ２１の位置までのエジェクタ２１のストロークに対応して可動接点１３ａのストローク量を一定またはほぼ一定に調整する調整機能を有するストローク調整部として構成される。したがって、バックル７の種々の仕様によりエジェクタ２１のストローク量が種々異なっても、第１ないし第３の固定端子１０,１１,１２および可動接点１３ａを変更させることなく共通に設定することが可能となる。 Thus, the first and second pressed parts 13e and 13f of the operating part 13b are ejected from the inoperative position of the ejector 21 to at least the position of the ejector 21 with the latch member engaged with the tongue 6. Is configured as a stroke adjustment unit having an adjustment function for adjusting the stroke amount of the movable contact 13a to be constant or substantially constant corresponding to the stroke of the stroke. Therefore, even if the stroke amount of the ejector 21 varies depending on various specifications of the buckle 7, the first to third fixed terminals 10, 11, 12 and the movable contact 13a can be set in common without changing. Become.
　その場合、第１ないし第３の固定接点１０ｂ,１１ｂ,１２ｂがばね性を有し、可動端子１３がばね性を有していないことで、第１ないし第３の固定接点１０ｂ,１１ｂ,１２ｂと可動端子１３の可動接点１３ａとの電気的接触がより一層安定して行われるとともに、第１および第２の被押圧部１３ｅ,１３ｆが弾性変形しなく、可動端子１３のストローク調整部がストローク調整機能をより一層効果的に発揮される。 In this case, the first to third fixed contacts 10b, 11b, 12b have spring properties, and the movable terminal 13 does not have spring properties, so that the first to third fixed contacts 10b, 11b, 12b have the spring properties. And the movable contact 13a of the movable terminal 13 are more stably electrically contacted, the first and second pressed parts 13e and 13f are not elastically deformed, and the stroke adjusting part of the movable terminal 13 is stroked. The adjustment function is more effectively exhibited.
　第１ないし第３のリード線１４,１５,１６の先端部は、それぞれ対応する第１ないし第３の固定端子１０,１１,１２の第１ないし第３の固定端子本体１０ａ,１１ａ,１２ａに溶接により直接電気的に接続される。その場合、溶接は、溶接代が小さいスポット溶接が好ましい。なお、第１ないし第３のリード線１４,１５,１６の先端部と第１ないし第３の固定端子本体１０ａ,１１ａ,１２ａとの接続は半田により直接接続することも可能である。しかし、半田代が溶接代より大きいので、半田より溶接の方が好ましい。また、第１ないし第３の固定端子本体１０ａ,１１ａ,１３ａに接続された第１ないし第３のリード線１４,１５,１６のハーネス１７はハーネス固定支持部２０に固定支持される。 The leading ends of the first to third lead wires 14, 15, 16 are respectively connected to the first to third fixed terminal bodies 10a, 11a, 12a of the corresponding first to third fixed terminals 10, 11, 12 respectively. Direct electrical connection by welding. In that case, spot welding with a small welding allowance is preferable. It should be noted that the tips of the first to third lead wires 14, 15, 16 and the first to third fixed terminal bodies 10a, 11a, 12a can be directly connected by solder. However, since the soldering cost is larger than the welding cost, welding is preferable to soldering. Further, the harness 17 of the first to third lead wires 14, 15, 16 connected to the first to third fixed terminal bodies 10 a, 11 a, 13 a is fixedly supported by the harness fixing support portion 20.
　こうして、バックルスイッチ８は、スイッチホルダ９に、第１ないし第３の固定端子１０,１１,１２、可動端子１３、および第１ないし第３のリード線１４,１５,１６が一体的に組み付けられたスイッチユニットして構成される。そして、このようにユニット化されたバックルスイッチ８は、スイッチホルダ９がバックル７のベースに取り付けられることでバックル７に組み付けられる。 Thus, in the buckle switch 8, the first to third fixed terminals 10, 11, 12, the movable terminal 13, and the first to third lead wires 14, 15, 16 are integrally assembled to the switch holder 9. It is configured as a switch unit. The buckle switch 8 unitized in this way is assembled to the buckle 7 by attaching the switch holder 9 to the base of the buckle 7.
　次に、このように構成されたこの例のバックルスイッチ８におけるオン、オフ切替作動について説明する。
　図９（Ａ）に示すように、タング６がバックル７に挿入されないシートベルト非装着状態では、エジェクタ２１が前述の特開２００１－２１１９１２号公報に記載されているバックルと同様に、エジェクタ２１を非作動位置の方へ付勢するスプリングにより最もバックル７のタング挿入口側（図９（Ａ）において最も左側）に位置している。このため、エジェクタ２１の押圧部２１ａが可動端子１３の作動部１３ｂの第１の被押圧部１３ｅに当接しかつこの第１の被押圧部１３ｅを図９（Ａ）において左方に移動させる。したがって、可動端子１３も最もバックル７のタング挿入口側（図９（Ａ）において最も左側）に位置している。可動端子１３のこの位置では、可動端子１３の可動接点１３ａが、第１および第２の固定接点１０ｂ,１１ｂの第１および第２の接点部１０ｂ1,１１ｂ1に電気的に接触している。これにより、第１および第２の固定接点１０ｂ,１１ｂが可動接点１３ａを介して互いに導通しているとともに、第３の固定接点１２ｂが第１および第２の固定接点１０ｂ,１１ｂから電気的に遮断されている。第１ないし第３の固定接点１０ｂ,１１ｂ,１２ｂと可動接点１３ａのこの状態では、バックルスイッチ８はオフとなる。このとき、第１および第２の固定接点１０ｂ,１１ｂはばね性により弾性的に撓んでいるとともに、第３の固定接点１２ｂは自由状態となっている。 Next, the on / off switching operation of the buckle switch 8 of this example configured as described above will be described.
As shown in FIG. 9A, when the tongue 6 is not inserted into the buckle 7, when the seat belt is not attached, the ejector 21 is not attached to the ejector 21 in the same manner as the buckle described in Japanese Patent Laid-Open No. 2001-211912. It is located on the tongue insertion port side of the buckle 7 (the leftmost side in FIG. 9A) by a spring that biases toward the non-actuated position. For this reason, the pressing part 21a of the ejector 21 abuts on the first pressed part 13e of the operating part 13b of the movable terminal 13, and the first pressed part 13e is moved to the left in FIG. 9A. Therefore, the movable terminal 13 is also located on the tongue insertion port side of the buckle 7 (the leftmost side in FIG. 9A). At this position of the movable terminal 13, the movable contact 13a of the movable terminal 13 is in electrical contact with the first and second contact portions 10b 1 and 11b 1 of the first and second fixed contacts 10b and 11b. . As a result, the first and second fixed contacts 10b and 11b are electrically connected to each other via the movable contact 13a, and the third fixed contact 12b is electrically connected to the first and second fixed contacts 10b and 11b. Blocked. In this state of the first to third fixed contacts 10b, 11b, 12b and the movable contact 13a, the buckle switch 8 is turned off. At this time, the first and second fixed contacts 10b and 11b are elastically bent due to the spring property, and the third fixed contact 12b is in a free state.
　シートベルト装着等のため、タング６の係合部６ａがバックル７のタング挿入口を通してバックル７内に挿入すると、従来のタングおよびバックルと同様に、バックル７内に挿入されたタング６の係合部６ａの先端がバックル７のエジェクタ２１に当接する。タング６の係合部６ａが更にバックル７内に挿入されると、エジェクタ２１がタング６の押圧力によりスプリングの付勢力に抗して図９（Ａ）において右方へ移動する。このとき、エジェクタ２１の押圧部２１ａは第１の被押圧部１３ｅから離間するだけであり、第１および第２の被押圧部１３ｅ,１３ｆのいずれにも当接しなく、これらを押圧しない。したがって、エジェクタ２１が右方へ移動しても、可動端子１３は移動しなく、バックルスイッチ８はオフの状態が保持されている。 When the engaging portion 6a of the tongue 6 is inserted into the buckle 7 through the tongue insertion port of the buckle 7 for seat belt mounting, etc., the engagement of the tongue 6 inserted into the buckle 7 is similar to the conventional tongue and buckle. The tip of the part 6 a comes into contact with the ejector 21 of the buckle 7. When the engaging portion 6 a of the tongue 6 is further inserted into the buckle 7, the ejector 21 moves to the right in FIG. 9A against the urging force of the spring by the pressing force of the tongue 6. At this time, the pressing portion 21a of the ejector 21 is merely separated from the first pressed portion 13e, does not contact any of the first and second pressed portions 13e, 13f, and does not press them. Therefore, even if the ejector 21 moves to the right, the movable terminal 13 does not move, and the buckle switch 8 is kept off.
　エジェクタ２１が所定距離移動すると、エジェクタ２１の押圧部２１ａが第２の被押圧部１３ｆに当接するとともに第２の被押圧部１３ｆを押圧する。すると、可動端子１３がエジェクタ２１の右方への移動とともに右方へ移動する。これにより、図９（Ｂ）に示すように可動接点１３ａが第１の固定端子１１の第１の固定接点１０ｂから離間するとともに、可動接点１３ａの第２のガイド部１３ｄが第３の固定端子１３の第３の固定接点１２ｂに当接する。これにより、第１の固定接点１０ｂは自由状態となる。タング６が更にバックル７内に挿入されてエジェクタ２１および可動端子１３が右方へ移動すると、第３の固定接点１２ｂが第２のガイド部１３ｄによって弾性的に撓む。そして、図９（Ｃ）に示すように可動接点１３ａが第３の固定接点１２ｂに電気的に接触する。こうして、第２および第３の固定接点１１ｂ,１２ｂが可動接点１３ａを介して互いに導通するとともに、第１の固定接点１０ｂが第２および第３の固定接点１１ｂ,１２ｂから電気的に遮断される。第１ないし第３の固定接点１０ｂ,１１ｂ,１２ｂと可動接点１３ａのこの状態では、可動接点１３ａによりバックルスイッチ８のオフ回路からオン回路に切り替えられて、バックルスイッチ８がオンとなる。 When the ejector 21 moves a predetermined distance, the pressing portion 21a of the ejector 21 contacts the second pressed portion 13f and presses the second pressed portion 13f. Then, the movable terminal 13 moves to the right as the ejector 21 moves to the right. Accordingly, as shown in FIG. 9B, the movable contact 13a is separated from the first fixed contact 10b of the first fixed terminal 11, and the second guide portion 13d of the movable contact 13a is the third fixed terminal. It abuts on the 13th fixed contact 12b. Thereby, the 1st fixed contact 10b will be in a free state. When the tongue 6 is further inserted into the buckle 7 and the ejector 21 and the movable terminal 13 move to the right, the third fixed contact 12b is elastically bent by the second guide portion 13d. Then, as shown in FIG. 9C, the movable contact 13a is in electrical contact with the third fixed contact 12b. Thus, the second and third fixed contacts 11b and 12b are electrically connected to each other via the movable contact 13a, and the first fixed contact 10b is electrically disconnected from the second and third fixed contacts 11b and 12b. . In this state of the first to third fixed contacts 10b, 11b, 12b and the movable contact 13a, the buckle switch 8 is turned on by switching the buckle switch 8 from the OFF circuit to the ON circuit by the movable contact 13a.
　タング６がバックル７内に最大に挿入された後、乗員がタング６を放すと、スプリングで付勢されているエジェクタ２１によりタング６がバックル７のタング挿入口の方（図９（Ｃ）において左方）へわずかに移動して、タング６の係合部６ａがバックル７のラッチ部材にラッチする。こうして、タング６がバックル７にラッチされる。このようにタング６がバックル７にラッチされた状態では、バックルスイッチ８はオン状態に保持される。そして、タング６とバックル７との係合がシートベルト装着のために行われた場合には、余分に引き出されたシートベルト６がシートベルトリトラクタ３に巻き取られることで、シートベルト６が乗員に装着される。 When the occupant releases the tongue 6 after the tongue 6 is inserted into the buckle 7 at the maximum, the tongue 6 is moved toward the tongue insertion port of the buckle 7 by the ejector 21 biased by the spring (FIG. 9C). It moves slightly to the left) and the engaging portion 6a of the tongue 6 latches on the latch member of the buckle 7. Thus, the tongue 6 is latched to the buckle 7. In this manner, when the tongue 6 is latched by the buckle 7, the buckle switch 8 is held in the on state. When the engagement between the tongue 6 and the buckle 7 is performed for wearing the seat belt, the seat belt 6 that has been pulled out is wound around the seat belt retractor 3 so that the seat belt 6 is It is attached to.
　タング６とバックル７との係合を解除するために、前述の特開２００１－２１１９１２号公報に記載されているタングとバックルと同様に、バックル７の解除操作ボタン（本発明の解除操作部材に相当）が押されると、バックル７のラッチ部材とタング６の係合部６ａとの係合が解除される。すると、スプリングで付勢されているエジェクタ２１によりタング６がエジェクタ２１とともにバックル７のタング挿入口の方（図９（Ｃ）において左方）へ移動して、タング６の係合部６ａがバックル７のタング挿入口から離脱する。こうして、タング６とバックル７との係合が解除される。 In order to release the engagement between the tongue 6 and the buckle 7, as with the tongue and the buckle described in the above-mentioned Japanese Patent Application Laid-Open No. 2001-211912, the release operation button of the buckle 7 Is pressed, the engagement between the latch member of the buckle 7 and the engaging portion 6a of the tongue 6 is released. Then, the tongue 6 moves together with the ejector 21 toward the tongue insertion port of the buckle 7 (leftward in FIG. 9C) by the ejector 21 biased by the spring, and the engaging portion 6a of the tongue 6 buckles. Remove from 7 tongue insertion slot. Thus, the engagement between the tongue 6 and the buckle 7 is released.
　そして、タング６のこの係合解除方向への移動により、エジェクタ２１の押圧部２１ａが第１の被押圧部１３ｅに当接するとともに第１の被押圧部１３ｅを押圧する。すると、可動端子１３がエジェクタ２１の左方への移動とともに左方へ移動する。これにより、可動接点１３ａが第３の固定端子１３の第３の固定接点１２ｂから離間するとともに、可動接点１３ａの第１のガイド部１３ｃが第１の固定端子１１の第１の固定接点１０ｂに接触する。これにより、第３の固定接点１２ｂは自由状態となる。以後、前述のタング６のバックル７への挿入時におけるバックルスイッチ８の動作と逆の動作が行われる。そして、図９（Ａ）に示すようにエジェクタ２１が非作動位置（初期位置）に移動すると、可動接点１３ａが第１の固定接点１０ｂに電気的に接触する。こうして、第１および第２の固定接点１０ｂ,１１ｂが可動接点１３ａを介して互いに導通するとともに、第３の固定接点１２ｂが第１および第２の固定接点１０ｂ,１１ｂから電気的に遮断される。第１ないし第３の固定接点１０ｂ,１１ｂ,１２ｂと可動接点１３ａのこの状態では、可動接点１３ａによりバックルスイッチ８のオン回路からオフ回路に切り替えられて、バックルスイッチ８がオフとなる。そして、タング６とバックル７との係合がシートベルト装着のために行われた場合には、タング６とバックル７との係合が解除されて、シートベルト装着のために引き出されたシートベルト６が、引き出された量だけシートベルトリトラクタ３に巻き取られることで、シートベルト６の装着が解除される。 Then, due to the movement of the tongue 6 in this disengagement direction, the pressing portion 21a of the ejector 21 contacts the first pressed portion 13e and presses the first pressed portion 13e. Then, the movable terminal 13 moves to the left as the ejector 21 moves to the left. As a result, the movable contact 13 a is separated from the third fixed contact 12 b of the third fixed terminal 13, and the first guide portion 13 c of the movable contact 13 a becomes the first fixed contact 10 b of the first fixed terminal 11. Contact. Thereby, the 3rd fixed contact 12b will be in a free state. Thereafter, the reverse operation of the operation of the buckle switch 8 when the tongue 6 is inserted into the buckle 7 is performed. Then, as shown in FIG. 9A, when the ejector 21 moves to the non-operating position (initial position), the movable contact 13a comes into electrical contact with the first fixed contact 10b. Thus, the first and second fixed contacts 10b and 11b are electrically connected to each other via the movable contact 13a, and the third fixed contact 12b is electrically disconnected from the first and second fixed contacts 10b and 11b. . In this state of the first to third fixed contacts 10b, 11b, 12b and the movable contact 13a, the buckle switch 8 is turned off by switching from the ON circuit to the OFF circuit of the buckle switch 8 by the movable contact 13a. When the engagement between the tongue 6 and the buckle 7 is performed for wearing the seat belt, the engagement between the tongue 6 and the buckle 7 is released and the seat belt pulled out for wearing the seat belt is used. 6 is wound around the seat belt retractor 3 by the pulled amount, so that the seat belt 6 is unmounted.
　この例のバックルスイッチ２１，バックル７およびシートベルト装置１によれば、バックルスイッチ８の可動端子１３に、第１および第２の被押圧部１３ｅ,１３ｆで構成されるストローク調整部が設けられる。これにより、エジェクタ２１の非作動位置から少なくともラッチ部材がタングと係合した状態でのエジェクタ２１の位置までのエジェクタ２１のストローク量に対応して可動接点１３ａのストローク量が一定またはほぼ一定に調整される。したがって、スイッチホルダ９、第１ないし第３の固定端子１０,１１,１２、可動接点１３ａ、第１および第２のガイド部１３ｃ,１３ｄ、および、それらの形状寸法および配設位置を変更することなく、バックルスイッチ８をエジェクタ２１のストローク量が種々異なるバックル７の仕様に柔軟に対応させることができる。すなわち、バックル７の種々の仕様によりエジェクタ２１のストローク量が種々異なっても、第１ないし第３の固定端子１０,１１,１２および可動接点１３ａを変更させることなく共通にすることが可能となる。こうして、タング６の挿入により移動されるエジェクタ１の異なるストローク量に柔軟に対応して、バックルスイッチ２１の製造工数を削減するとともに、バックルスイッチ２１のコストをより効果的に低減することができる According to the buckle switch 21, the buckle 7 and the seatbelt device 1 of this example, the movable terminal 13 of the buckle switch 8 is provided with a stroke adjusting portion constituted by the first and second pressed portions 13e and 13f. Accordingly, the stroke amount of the movable contact 13a is adjusted to be constant or substantially constant corresponding to the stroke amount of the ejector 21 from the non-operating position of the ejector 21 to the position of the ejector 21 in a state where at least the latch member is engaged with the tongue. Is done. Therefore, the switch holder 9, the first to third fixed terminals 10, 11, 12, the movable contact 13a, the first and second guide portions 13c, 13d, and the shape dimensions and arrangement positions thereof are changed. In addition, the buckle switch 8 can be flexibly adapted to the specifications of the buckle 7 in which the stroke amount of the ejector 21 varies. That is, even if the stroke amount of the ejector 21 varies depending on various specifications of the buckle 7, the first to third fixed terminals 10, 11, 12 and the movable contact 13a can be made common without being changed. . In this way, it is possible to flexibly cope with different stroke amounts of the ejector 1 moved by inserting the tongue 6, thereby reducing the number of manufacturing steps of the buckle switch 21 and reducing the cost of the buckle switch 21 more effectively.
　その場合、第１ないし第３の固定接点１０ｂ,１１ｂ,１２ｂがばね性を有し、可動端子１３がばね性を有しないことで、第１ないし第３の固定接点１０ｂ,１１ｂ,１２ｂと可動端子１３の可動接点１３ａとの電気的接触をより一層安定して行うことができるとともに、第１および第２の被押圧部１３ｅ,１３ｆが弾性変形しなく、可動端子１３のストローク調整部のストローク調整機能をより一層効果的に発揮させることが可能となる。 In that case, the first to third fixed contacts 10b, 11b, and 12b have spring properties, and the movable terminal 13 does not have spring properties, so that the first to third fixed contacts 10b, 11b, and 12b are movable. The electrical contact of the terminal 13 with the movable contact 13a can be performed more stably, and the first and second pressed parts 13e and 13f are not elastically deformed, and the stroke of the stroke adjusting part of the movable terminal 13 The adjustment function can be more effectively exhibited.
　また、第１ないし第３の固定接点１０ｂ,１１ｂ,１２ｂがばね性を有することで、細長い第１ないし第３の固定端子本体１０ａ,１１ａ,１２ａを、それらの長手方向がタング挿入方向と直交またはほぼ直交する方向となるように配設させることが可能となる。これにより、バックルスイッチ２１のタング挿入方向の長さをより短くすることができる。 Further, since the first to third fixed contacts 10b, 11b, and 12b have a spring property, the longitudinal directions of the elongated first to third fixed terminal bodies 10a, 11a, and 12a are orthogonal to the tongue insertion direction. Alternatively, it can be arranged so as to be substantially orthogonal. Thereby, the length of the tongue insertion direction of the buckle switch 21 can be further shortened.
　更に、第１ないし第３のリード線１４,１５,１６の先端部を、それぞれ第１ないし第３の固定接点１０ｂ,１１ｂ,１２ｂに直接溶接することで、第１ないし第３のリード線１４,１５,１６と第１ないし第３の固定接点１０ｂ,１１ｂ,１２ｂとの接続代（溶接代）を小さくすることが可能となる。これにより、第１ないし第３のリード線１４,１５,１６と第１ないし第３の固定接点１０ｂ,１１ｂ,１２ｂとの接続部との構造をコンパクトにすることが可能となる。特に、溶接に溶接代が小さいスポット溶接を用いることで、前述の接続部をより効果的にコンパクトにすることができる。 Further, the first to third lead wires 14 are directly welded to the first to third fixed contacts 10b, 11b, and 12b, respectively, so that the tip ends of the first to third lead wires 14, 15, and 16 are directly welded. , 15, 16 and the first to third fixed contacts 10b, 11b, 12b can be reduced in connection allowance (welding allowance). As a result, the structure of the connection portion between the first to third lead wires 14, 15, 16 and the first to third fixed contacts 10b, 11b, 12b can be made compact. In particular, by using spot welding with a small welding allowance for welding, the aforementioned connecting portion can be made more effective and compact.
　更に、スイッチホルダ９に、固定端子取付部１８、可動端子取付部１９、およびハーネス固定支持部２０を一体に設けているので、バックルスイッチ８は、スイッチホルダ９に、第１ないし第３の固定端子１０,１１,１２、可動端子１３、および第１ないし第３のリード線１４,１５,１６を一体的に組み付けてスイッチユニットして構成することができる。これにより、バックルスイッチ８を、バックル７のベースに簡単に組み付けることが可能となり、組付け作業性を向上させることができる。しかも、バックルスイッチ８の組付け時等に第１ないし第３のリード線１４,１５,１６が引っ張られても、第１ないし第３の固定端子１０,１１,１２と第１ないし第３のリード線１４,１５,１６との接続部のダメージを防止することができる。 Furthermore, since the fixed terminal mounting portion 18, the movable terminal mounting portion 19, and the harness fixing support portion 20 are integrally provided in the switch holder 9, the buckle switch 8 is fixed to the switch holder 9 in the first to third fixing directions. The terminals 10, 11, 12, the movable terminal 13, and the first to third lead wires 14, 15, 16 can be integrally assembled to form a switch unit. Thereby, the buckle switch 8 can be easily assembled to the base of the buckle 7, and the assembling workability can be improved. Moreover, even if the first to third lead wires 14, 15, 16 are pulled when the buckle switch 8 is assembled, the first to third fixed terminals 10, 11, 12 and the first to third leads Damage to the connecting portion with the lead wires 14, 15, 16 can be prevented.
　更に、第１ないし第３の固定端子１０,１１,１２の第１ないし第３の固定端子本体１０ａ,１１ａ,１２ａをスイッチホルダ９に、このスイッチホルダ９に設けた突起１８ａをかしめることで取り付けている。第１ないし第３の固定端子本体１０ａ,１１ａ,１２ａをスイッチホルダ９に差し込みで取り付けた場合には、差し込みによるがたが生じるため、第１ないし第３の固定接点１０ｂ,１１ｂ,１２ｂの位置のばらつきが生じる。また、第１ないし第３の固定端子本体１０ａ,１１ａ,１２ａをスイッチホルダ９にねじにより取り付けた場合には、部品点数が多くなるばかりでなく、作業工数が増大する。これに対して、この例のように第１ないし第３の固定端子本体１０ａ,１１ａ,１２ａをスイッチホルダ９にかしめにより取り付けることにより、第１ないし第３の固定端子１０,１１,１２をスイッチホルダ９に、安定してより堅固に取り付けることができる。これにより、第１ないし第３の固定接点１０ｂ,１１ｂ,１２ｂの位置のばらつきを抑制することができるとともに、部品点数を低減できるとともに、作業工数を削減することができる。 Further, the first to third fixed terminal bodies 10a, 11a, and 12a of the first to third fixed terminals 10, 11, and 12 are caulked to the switch holder 9 and the protrusion 18a provided on the switch holder 9 is caulked. It is attached. When the first to third fixed terminal bodies 10a, 11a, 12a are attached to the switch holder 9 by insertion, there is a backlash caused by the insertion, so the positions of the first to third fixed contacts 10b, 11b, 12b Variation occurs. Further, when the first to third fixed terminal bodies 10a, 11a, and 12a are attached to the switch holder 9 with screws, not only the number of parts increases, but also the work man-hour increases. On the other hand, by attaching the first to third fixed terminal bodies 10a, 11a, 12a to the switch holder 9 by caulking as in this example, the first to third fixed terminals 10, 11, 12 are switched. The holder 9 can be stably and firmly attached. As a result, variations in the positions of the first to third fixed contacts 10b, 11b, and 12b can be suppressed, the number of parts can be reduced, and the number of work steps can be reduced.
　更に、可動端子１３の作動部１３ｂをエジェクタ２１で直接押圧（作動）している。エジェクタ２１はバックル７内に挿入されるタング６の係合部６ａで直接ストロークされるので、可動接点１３ａをより効果的移動させることができる。これにより、タング６の係合部６ａとバックル７のラッチ部材との係合状態をより安定して検出することが可能となる。 Furthermore, the operating portion 13b of the movable terminal 13 is directly pressed (operated) by the ejector 21. Since the ejector 21 is directly stroked by the engaging portion 6a of the tongue 6 inserted into the buckle 7, the movable contact 13a can be moved more effectively. Thereby, it becomes possible to detect the engagement state of the engaging portion 6a of the tongue 6 and the latch member of the buckle 7 more stably.
　なお、本発明は前述の実施の形態における各例に限定されるものではない。例えば、前述の実施の形態の例では、バックルスイッチ２１のオン、オフを切り替えるバックル可動構成部材としてエジェクタ２１を用いているが、例えばラッチ部材やロックピン等のバックル７内に挿入されたタング６の移動に関連して移動するバックル可動構成部材であれば、どのようなバックル可動構成部材を用いることもできる。また、前述の例では、バックル７自体の構成は特開２００１－２１１９１２号公報に記載されているバックル自体の構成を用いているが、本発明のバックルスイッチは、タング６の挿入により移動するバックル可動構成部材を有するバックルであればどのようなバックルにも適用することができる。要は、本発明のバックルスイッチ８，バックル７、およびシートベルト装置１は、特許請求の範囲に記載された範囲で種々の設計変更が可能である。 Note that the present invention is not limited to the examples in the above-described embodiment. For example, in the example of the above-described embodiment, the ejector 21 is used as a buckle movable component that switches the buckle switch 21 on and off. However, the tongue 6 inserted into the buckle 7 such as a latch member or a lock pin, for example. Any buckle movable component can be used as long as it can move in relation to the movement of the buckle. In the above example, the configuration of the buckle 7 itself uses the configuration of the buckle itself described in Japanese Patent Application Laid-Open No. 2001-211912. However, the buckle switch of the present invention has a buckle that moves when the tongue 6 is inserted. Any buckle having a movable component can be applied. In short, the buckle switch 8, the buckle 7, and the seat belt device 1 of the present invention can be variously modified within the scope described in the claims.
　本発明のバックルスイッチおよびバックルは、それぞれ自動車その他の交通機関の座席に装備されて乗員を拘束するシートベルト装置や建築作業現場等において作業者を拘束するベルト装置に用いられるバックルスイッチおよびバックルに好適に利用することができる。
　また、本発明のシートベルト装置は、それぞれ自動車その他の交通機関の座席に装備されて、シートベルトに支持されたタングとバックルとの係合により乗員を拘束するシートベルト装置に好適に利用することができる。 The buckle switch and the buckle according to the present invention are suitable for a buckle switch and a buckle used in a seat belt device that restrains an occupant and a belt device that restrains an operator at a construction work site, etc., which are respectively mounted on a seat of an automobile or other transportation. Can be used.
Further, the seat belt device of the present invention is preferably used in a seat belt device which is mounted on a seat of an automobile or other transportation system and restrains an occupant by engagement of a tongue and a buckle supported by the seat belt. Can do.

Claims (11)

  1. 　固定接点をそれぞれ有する複数の固定端子と、
    　前記複数の固定端子にそれぞれ電気的に接続される複数のリード線と、
    　前記複数の固定端子の各固定接点に接触可能でかつ前記固定接点に対して摺動可能な可動接点を有する可動端子と、
    　バックル可動構成部材のストロークによりストロークして前記可動端子をストロークする作動部とを少なくとも備え、
    　前記作動部は、前記バックル可動構成部材の予め設定されたストローク量に対応して前記可動接点のストローク量が一定またはほぼ一定となるように前記作動部のストローク量を調整するストローク調整部を有することを特徴とするバックルスイッチ。     A plurality of fixed terminals each having a fixed contact;
    A plurality of leads which are electrically connected to the plurality of fixed terminals,
    A movable terminal having a movable contact that can contact each of the fixed contacts of the plurality of fixed terminals and is slidable with respect to the fixed contact;
    And at least an operating part that strokes the movable terminal by stroking with a stroke of the buckle movable component,
    The operating unit includes a stroke adjusting unit that adjusts a stroke amount of the operating unit so that a stroke amount of the movable contact is constant or substantially constant corresponding to a preset stroke amount of the buckle movable component member. A buckle switch characterized by that.
  2. 　前記可動端子と前記作動部とは一体に構成されていることを特徴とする請求項１に記載のバックルスイッチ。 2. The buckle switch according to claim 1, wherein the movable terminal and the actuating portion are integrally formed.
  3. 　前記作動部は細長い平板状に形成されており、
    　前記ストローク調整部は、細長い平板状の両端部に設けられかつ前記バックル可動構成部材により択一的に押圧される第１および第２の被押圧部を有し、
    　前記バックル可動構成部材に押圧される前記第１および第２の被押圧部の第１および第２の被押圧面間の距離が、前記バックル可動構成部材の予め設定されたストローク量に対応して設定されることを特徴とする請求項１または２に記載のバックルスイッチ。     The actuating portion is formed in a narrow flat,
    The stroke adjusting portion includes first and second pressed portions that are provided at both ends of an elongated flat plate and are alternatively pressed by the buckle movable component member,
    The distance between the first and second pressed surfaces of the first and second pressed parts pressed by the buckle movable component corresponds to a preset stroke amount of the buckle movable component. The buckle switch according to claim 1, wherein the buckle switch is set.
  4. 　前記複数の固定端子の各固定接点は、いずれもばね性を有して前記可動接点が接触したとき弾性的に撓むことを特徴とする請求項１ないし３のいずれか１に記載のバックルスイッチ。 4. The buckle switch according to claim 1, wherein each of the fixed contacts of the plurality of fixed terminals has a spring property and bends elastically when the movable contact contacts. 5. .
  5. 　前記複数の固定端子はいずれも細長い帯板状に形成されているとともに、それぞれ前記バックル可動構成部材のストローク方向に所定の間隔を置きかつ長手方向が前記バックル可動構成部材のストローク方向と直交またはほぼ直交する方向に配設されていることを特徴とする請求項１ないし４のいずれか１に記載のバックルスイッチ。 Each of the plurality of fixed terminals is formed in an elongated strip shape, and each has a predetermined interval in the stroke direction of the buckle movable component, and the longitudinal direction is orthogonal or substantially perpendicular to the stroke direction of the buckle movable component. The buckle switch according to any one of claims 1 to 4, wherein the buckle switch is disposed in an orthogonal direction.
  6. 　前記複数のリード線は、それぞれ対応する前記複数の固定端子に溶接により接続されることを特徴とする請求項１ないし５のいずれか１に記載のバックルスイッチ。 The buckle switch according to any one of claims 1 to 5, wherein the plurality of lead wires are connected to the plurality of corresponding fixed terminals by welding, respectively.
  7. 　固定端子取付部およびハーネス取付部が一体に設けられたスイッチホルダを有し、
    　前記固定端子取付部に前記複数の固定端子が取り付けられるとともに、前記ハーネス取付部に前記複数のリード線のハーネスが取り付けられることを特徴とする請求項１ないし６のいずれか１に記載のバックルスイッチ。     Having a switch holder in which a fixed terminal mounting portion and a harness mounting portion are provided integrally;
    7. The buckle switch according to claim 1, wherein the plurality of fixed terminals are attached to the fixed terminal attaching portion, and the harnesses of the plurality of lead wires are attached to the harness attaching portion. .
  8. 　前記複数の固定端子はいずれも前記スイッチホルダに、前記スイッチホルダの前記固定端子取付部をかしめることで取り付けられることを特徴とする請求項１ないし７のいずれか１に記載のバックルスイッチ。 The buckle switch according to any one of claims 1 to 7, wherein each of the plurality of fixed terminals is attached to the switch holder by caulking the fixed terminal attaching portion of the switch holder.
  9. 　両側壁を有するベースと、
    　前記両側壁に、タングが挿入されないときに位置する非作動位置と前記タングをラッチする作動位置との間で移動可能に支持されるラッチ部材と、
    　前記ベースに、前記タングが挿入されないときに位置する非作動位置と前記タングが前記ラッチ部材にラッチされたときに位置する作動位置との間で移動可能に設けられ、前記タングがタング挿入口から挿入されることによって前記作動位置へ移動するとともに、前記タングを前記タング挿入口の方へ常時付勢するエジェクタと、
    　前記タングと前記ラッチ部材とのラッチを解除するための解除操作部材と、
    　前記タングと前記ラッチ部材とのラッチを検出するバックルスイッチとを少なくとも備え、
    　前記バックルスイッチは、請求項１ないし８のいずれか１に記載のバックルスイッチであることを特徴とするバックル。     A base having side walls;
    A latch member supported on the both side walls so as to be movable between a non-actuated position when the tongue is not inserted and an actuated position for latching the tongue;
    The base is movably provided between a non-actuated position that is located when the tongue is not inserted and an actuated position that is located when the tongue is latched by the latch member. An ejector that moves to the operating position by being inserted and constantly urges the tongue toward the tongue insertion port;
    A release operation member for releasing the latch between the tongue and the latch member;
    A buckle switch for detecting a latch between the tongue and the latch member;
    The buckle switch according to any one of claims 1 to 8, wherein the buckle switch is a buckle switch.
  10. 　前記バックル可動構成部材は前記エジェクタであることを特徴とする請求項９に記載のバックル。 10. The buckle according to claim 9, wherein the buckle movable component is the ejector.
  11. 　シートベルトを巻き取るシートベルトリトラクタと、シートベルトに摺動可能に支持されたタングと、車体に設けられるとともに前記タングが係脱可能に係合されるバックルとを少なくとも備え、
    　前記バックルは請求項９または１０に記載のバックルであることを特徴とするシートベルト装置。     A seat belt retractor that winds up the seat belt; a tongue that is slidably supported by the seat belt; and a buckle that is provided on the vehicle body and that is detachably engaged with the tongue.
    The seat belt device according to claim 9 or 10, wherein the buckle is the buckle according to claim 9 or 10.
PCT/JP2011/007284 2011-01-27 2011-12-27 Buckle switch, buckle and seatbelt device WO2012101727A1 (en)

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JP2018034544A (en) * 2016-08-29 2018-03-08 株式会社東海理化電機製作所 Buckle device
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JP2003189912A (en) * 2001-12-27 2003-07-08 Takata Corp Buckle
JP2003197078A (en) * 2001-12-27 2003-07-11 Takata Corp Magnetic proximity switch and buckle switch
JP2009240528A (en) * 2008-03-31 2009-10-22 Autoliv Development Ab Buckle switch and seat belt buckle for vehicle

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US10030492B2 (en) 2015-06-25 2018-07-24 Saudi Arabian Oil Company Well testing through a generated exothermic reaction in the wellbore
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