JP2008057166A - Clutch mechanism of electric lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clutch mechanism of an electric lock which ensures engagement and disengagement between a clutch gear and engaging claws interlocking with a clutch plate. <P>SOLUTION: In the structure of the clutch mechanism of the electric lock, the clutch plate and the engaging claws are combined with the clutch gear, and one end of each engaging claw is axially supported via an interlocking means on the clutch plate while the other end of the same is engaged with and disengaged from ratchet teeth formed in a recess of the ratchet gear. When the clutch gear is rotated in a predetermined direction by receiving a driving force from a driving motor, the other end of each engaging claw is engaged with the ratchet teeth, and therefore the clutch plate is rotated together with the clutch gear. On the other hand when a driving force from a tumbler is transmitted via a driving arm to the clutch plate, the other end of each engaging claw is not engaged with the ratchet teeth, and therefore the clutch plate is rotated at least through a predetermined stroke. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a clutch mechanism for an electric lock.

  Patent Document 1 discloses “an electric clutch mechanism including a driving gear (clutch gear) and an engagement plate (clutch plate) incorporated in a recess of the driving gear”. This patent document 1 has been proposed by the applicant.

  By the way, the engagement relationship between the clutch gear described in Patent Document 1 and the engagement plate (clutch plate) incorporated in the recess of the drive gear is the relationship between the engaged portion (notch portion) in the recess and the engagement plate. Due to the relationship with the engagement protrusion of the elastic engagement displacement portion (resin spring portion), the drive gear may run idle during operation. I will lay down this issue.

  For example, in the clutch mechanism of the first embodiment, “the drive gear (clutch gear) is incorporated in a recess formed on the upper surface of one side of the drive gear and is normally combined with the drive arm and the drive gear. A non-circular engaging plate that works, and when an abnormal torque is applied to the engaging plate through the drive arm by a keying operation in an abnormal state, the engaging plate It is composed of a synthetic resin engagement plate (clutch plate) having an elastic engagement displacement portion that can be displaced inward so as to be disengaged from the engagement portion.

  However, in the first embodiment, each function such as the rigid function (hardness), the elastic displacement function (softness), the elastic return function (spring force), etc. of the elastic engagement displacement portion of the engagement plate and the coverage of the drive gear is provided. A delicate balance with the shape of the engaging portion (locking force, frictional force) is required.

  That is, if the engagement relationship between the two members is insufficient (the engagement force is weak), the drive gear may run idle. On the other hand, if the engagement relationship between the two members is strong (the engagement force is strong), the key lock, etc. When unlocking using the operating member, there is a drawback that the engagement plate does not rotate easily (the engagement relationship is not canceled by a weak force) unless a considerable force is applied. In other words, children and the elderly cannot easily unlock when there is an abnormality.

Thus, there is a demand for the appearance of a novel clutch mechanism that improves the problems of Patent Document 1 (the published invention of the prior application).
JP 2006-138072 A

  An intended object of the present invention is to ensure the engagement and disengagement relationship between the clutch gear and the engagement claw piece linked to the clutch plate. The second purpose is that when the clutch gear rotates in one direction, the clutch plate also rotates in the same direction, whereby the engagement protrusion of the drive arm can repeat a circular trajectory. In other words, the locking and unlocking of the electric lock can be repeated by rotating the clutch gear and the clutch plate in the same direction. The third object is not to concentrate the load on one engaging claw piece that engages with the clutch gear. Other purposes can be objectively specified by the description of the specification.

  The clutch mechanism of the electric lock according to the present invention is the clutch mechanism of the electric lock having a clutch gear for transmitting the driving force of the drive motor controlled by the control unit to the dharma side. The one end of the engaging claw piece is pivotally supported by the clutch plate via the linkage means, and the other end is engaged with and disengaged from the ratchet teeth formed in the recess of the clutch gear, and the clutch gear is driven by the drive motor. When the driving force is received from the side and rotated in a predetermined direction, the other end of the engaging claw piece engages with the ratchet teeth, so that the clutch plate rotates together with the clutch gear, while the operating force from the dharma side Is transmitted to the clutch plate via the drive arm, the other end portion of the engagement claw piece does not mesh with the ratchet teeth, and the clutch plate rotates at least a required amount.

(A) Since it is a combination of a clutch gear (internal toothed wheel) and a clutch plate provided with an engaging claw piece that engages with and disengages from a ratchet tooth (internal tooth) of the clutch gear, the clutch gear and the clutch plate are separated by a simple mechanism. The engagement and disengagement relationship with the engaging claw piece linked with the can be ensured. Therefore, the problem of patent document 1 can be solved.
(B) When the clutch gear rotates in one direction, the clutch plate also rotates in the same direction, so that the engagement protrusion of the drive arm can repeat a circular trajectory. In addition, the locking and unlocking of the electric lock can be repeated by rotating the clutch gear and the clutch plate in the same direction.
(C) The clutch gear is formed with a plurality of internal teeth, while the engagement claw pieces engaged with and disengaged from the internal teeth are loaded with a plurality of engagement claw pieces engaged with the clutch gear. Can not concentrate.
(D) In the invention described in claim 6, the clutch plate can have a plurality of functions. Therefore, the number of parts can be reduced.

(1) Main components of the electric lock X First, the configuration and operation of one embodiment of the present invention shown in FIGS. 1 to 14 will be described. The electric lock X of the present invention shown in FIGS. 1 and 2 includes a control unit 1 that is electrically connected to a signal detection means (not shown), a drive motor 2, a gear transmission means 3, a clutch mechanism Y, and a clutch that constitutes the clutch mechanism Y. The gear 11, the clutch plate 21 and the engaging claw piece 26, the drive arm 4 engaged with the clutch plate 21, the dharma 5 linked to the drive arm, the crank arm 6 linked to the dharma, and the forward / backward movement via the crank arm 6 A dead bolt 7 or the like is provided.

  The drive motor 2 is driven by being controlled (applying / unlocking voltage application) by the control unit 1, and the driving force of the drive motor 2 is transmitted to the Dharma 5 through the gear transmission means 3, the clutch mechanism Y and the drive arm 4. .

  On the other hand, the clutch mechanism Y uses the driving force of the dharma 5 that is rotated by the operating force of an operating member (for example, a key) (not shown), for example, via the rotation (for example, idling) of the clutch plate 21 to the clutch gear 11 (drive motor 2). Can be cut.

  Specifically, for example, even when the key is repeatedly operated from locking to unlocking and from unlocking to locking in the normal time, the clutch plate 21 is circulated in the direction of idling by the guide mechanism for the drive arm. Therefore, the clutch gear 11 is not affected at all by the operating force of the operating member.

  In addition, even if the operation is switched from electric to manual operation and the operation member is repeatedly applied and unlocked, the engaging claw piece 26 does not mesh with the ratchet teeth 16 of the clutch gear 11 and the clutch plate 21 continues to idle in the same direction. . At this time, since the drive arm 4 repeats reciprocating motion, the electric lock can be repeatedly locked and unlocked via the dharma 5 interlocked with the drive arm 4.

(2) Clutch mechanism Y
First, as shown in FIG. 3, the clutch mechanism Y of the present invention is externally fitted to the clutch gear 11 and the cylindrical central shaft portion of the clutch gear 11 or attached to the stepped recess 15 of the clutch gear 11. The clutch plate 21 fitted in the state (this embodiment), and the ratchet teeth 16 that are pivotally supported by the clutch plate 21 via the coupling means 22 and 27 and formed in the annular recess 15 of the clutch gear 11. And an engaging claw piece 26 incorporated in the recess.

  Next, the clutch mechanism Y is provided in a space portion between the rear side of the dead bolt 7 and the rear wall 9 of the lock box. The clutch gear 11 having a shaft hole and the circular clutch plate 21 having a center hole are A clutch shaft 10 mounted horizontally on the box is rotatably provided.

  With reference to FIG. 1, a gear 2 b provided on the output shaft 2 a of the lateral drive motor 2 is located above the clutch gear 11. On the other hand, below the clutch gear 11, the dharma 5 is rotatably positioned via an unnumbered support seat.

  Further, the drive arm 4 is disposed in the vertical direction on the right side of the dharma 5. The upper end portion of the drive arm 4 is positioned in the recessed state of the clutch gear 11, and its engagement projection is engaged with and disengaged from the second engagement portion formed in a projection shape on the other side surface of the clutch plate 21. . On the other hand, the lower end of the drive arm 4 is pivotally attached to the dharma 5.

(3) Clutch gear 11
First, a specific configuration of the clutch gear 11 will be described with reference to FIG. 12 is a gear portion that meshes with the final gear of the gear transmission means 3, 13 is a cylindrical central shaft portion through which the clutch shaft 10 penetrates (free insertion), 14 is a shaft hole of the cylindrical central shaft portion, and 15 is formed on one side surface. The stepped recess 16 is a single or a plurality of ratchet teeth formed on the peripheral surface of the annular recess 15.

  In addition, the clutch gear 11 made of synthetic resin has a circular cylindrical central shaft portion 13 having a through hole (shaft hole) 14 at the center portion thereof with a gear portion 12 formed on the outer periphery of the peripheral side portion. Is formed. In this embodiment, since the clutch plate is fitted in the stepped surface of the stepped recess, the protruding amount of the central shaft portion 13 protruding from the bottom of the inner wall of the annular recess 15 is set appropriately. It is slightly lower than one side surface (circumferential surface) of the clutch gear 11. Further, as shown in FIG. 4, a plurality of ratchet teeth 16 (for example, four) are formed with a predetermined interval in the circumferential direction. Further, the clutch gear 11 is rotatably provided on the clutch shaft 10 that passes through the shaft hole 14.

(4) Clutch plate 21 and engaging claw piece 26
Next, a specific configuration of the clutch plate 21 and the engaging claw piece 26 will be described. The clutch plate 21 and the plurality of engaging claw pieces 26 constitute a “clutch member” and are combined with the clutch gear 11. In FIG. 1, the circular clutch plate 21 can be seen in front, and a total of four engaging claw pieces 26 are arranged in the annular recess 15 along the circumferential direction. In FIG. 2, the clutch plate 21 positioned in front is omitted, and the engagement claw pieces 26 in the annular recess 15 are engaged with the ratchet teeth 16 of the clutch gear 11. FIG. 5A shows the clutch plate 21.

  For example, referring to FIG. 5A, the clutch plate 21 is formed in a circular plate, and the outer diameter thereof is appropriately set in consideration of the inner diameter of the annular recess 15. As shown in FIG. 7, the clutch plate 21 of this embodiment is formed in a size that fits into the step surface of the annular recess 15 of the clutch gear 11. The clutch plate 21 has a plurality of first engaging portions 22 that engage with the engaging claw pieces 26 on one side surface, and a part of the peripheral end portion on the other side surface with the drive arm 4. A projection-like second engagement portion 23 is provided.

  Thus, the first engaging portion 22 is, for example, the support hole 22 and is formed in four with a predetermined interval in the circumferential direction. The projecting shafts 27 of the engaging claw pieces 26 are engaged with the support holes 22, respectively. On the other hand, the second engaging portion 23 has a ginkgo leaf shape having curved engaging surfaces 23a and 23b that are symmetrical with respect to the center hole 24 for the clutch shaft 10.

  Next, in FIG. 3, for convenience of explanation, the engagement claw pieces 26 are shown as “one”, and FIG. 5B shows the four engagement claw pieces 26 in an annular shape. The four engaging claw pieces 26 have the same configuration, and will be described with reference to FIG. The engagement claw piece 26 is formed in an arc shape, and a projection shaft 27 that engages with the first engagement portion 22 (support hole) of the clutch plate 21 is formed at one end portion, while the clutch gear 11 is formed at the other end portion. The ratchet teeth 16 are formed with engaging claws 28 that can be engaged and disengaged.

(5) Energizing means for the engaging claw piece 26 FIGS. 8 and 9 show an example of the urging means 29 for the engaging claw piece 26. FIG. In FIG. 8, for convenience of explanation, a case where the urging means 29 is mounted on one engagement claw piece 26 is shown, and the other urging means 29 is omitted. The urging means 29 can employ a coil spring, a leaf spring, etc., for example. It fits into the formed unsupported support groove and the other end is pressed against the spring end support 25 provided on the clutch plate. Therefore, each engaging claw piece 26 engages with the ratchet teeth 16 via the biasing means 29 at the time of engagement.

(6) Other Configurations and Actions First, the dharma 5 provided with sickle pieces has a plurality of connecting protrusions in the radially outward direction. One of them is connected to a dharma urging means 8 for switching and urging in a predetermined direction corresponding to the position position (locking position and unlocking position). The dharma urging means 8 includes an unnumbered bar-shaped connecting rod and an urging spring wound around the connecting rod.

  Next, one end portion 6 a of the crank arm 6 is connected to the first dead movable pin 45 of the hollow dead bolt 7, and the second crank movable pin 46 provided in the intermediate portion of the crank arm 6 is For example, the other end portion 6 b of the crank arm 6 is engaged with the guide portion of the crank arm guide member, and is pivotally attached to the first connecting protrusion that protrudes outward in the radial direction of the dharma 5.

(7) Configuration and Action of Clutch Mechanism Y As described above, a plurality of engagement claw pieces 26 are incorporated in the annular recess 15 of the clutch gear 11. Moreover, one end portion of the engaging claw piece 26 is pivotally supported by the clutch plate 21 via the linkage means (22, 27), and the other end portion is a ratchet tooth formed in the annular recess 15 of the clutch gear 11. 16 can be engaged and disengaged.

  Thus, as shown in FIG. 10, when the driving force is transmitted from the drive motor 2 side to the gear portion 12 of the clutch gear 11, the clutch gear 11 rotates in a predetermined direction indicated by an arrow A. Then, at the time of engagement, due to the spring force of the urging means 29, each engaging claw piece 26 opens radially outward like a petal, with the projecting shaft 27 as a fulcrum, and the engaging claw 28 at each other end is ratchet. Each tooth 16 is simultaneously engaged. Therefore, the clutch plate 21 can rotate together with the clutch gear 11.

(8) Engagement / Unlocking by Driving Force of Driving Motor The control unit 1 of this embodiment controls the driving motor 2 so that the clutch gear 11 repeats rotation in one direction. For example, as shown in FIGS. 10 and 11, when the clutch gear 11 rotates in one direction indicated by an arrow A, the clutch plate 21 also rotates in the same direction A, whereby the drive arm 4 repeats reciprocating motion in the arrow B direction. . At this time, the engagement protrusion 4a of the drive arm 4 draws a fixed locus as will be described later.

  FIG. 12 schematically shows movements of the clutch gear 11, the clutch plate 21, the drive arm 4, the dharma 5, and the crank arm 6 due to the driving force of the drive motor 2. FIG. 13 is a conceptual diagram showing the locus of the engaging protrusion 4a of the drive arm 4 guided by the guide mechanism (reference numeral 33 in FIG. 7). The engagement protrusion 4a of the drive arm 4 is guided by a known or new guide mechanism 33 (this embodiment) provided in the lock box, and preferably rotates cyclically while drawing an elliptical locus.

  Here, an example of the locus of the engaging protrusion 4a will be described with reference to FIG. At the time of unlocking (when the dead bolt is retracted), the engagement protrusion 4a of the drive arm 4 is at a position a below the guide track (for example, an annular groove), for example.

  Therefore, if a voltage for locking is applied to the driving motor 2 from the control unit 1 that has acquired the locking signal, the driving motor 2 is activated and the driving force is transmitted to the gear transmission means 3. The transmission power of the gear transmission means 3 is transmitted to the clutch gear 11 of the clutch mechanism Y. When the clutch gear 11 rotates in the direction of arrow A shown in FIG. 10, the clutch members 21 and 26 rotate together with the clutch gear 11 as described above, so that the engagement protrusion 4 a of the drive arm 4 is formed on the clutch plate 21. The second engagement portion 23 is pressed to move to the upper position b while drawing an arcuate track. In this embodiment, when locking (when the dead bolt protrudes), the engaging protrusion 4a is at a point b opposite to the point a.

  Next, when the unlocking voltage is applied to the drive motor 2 from the controller 1 that has acquired the unlock signal, the drive motor 2 is restarted, and the driving force is the gear transmission means 3 as described above. To be told. At this time, the clutch gear 11 rotates in the same direction (arrow A) as in the case of locking, and the clutch plate 21 also rotates in the same direction A. In other words, the engagement protrusion 4a returns from point b to point a while drawing an arcuate trajectory on the opposite side. Therefore, when the locking and unlocking are repeated, the engagement protrusion 4a is cyclically guided by the guide mechanism 33, and the drive arm 4 repeats the reciprocating motion in the vertical direction.

  The engaging protrusion 4a of this embodiment protrudes into and out of the upper end of the drive arm 4, and its inner protruding portion engages with the protruding second engaging portion 23 of the clutch plate 21, while the outer protruding portion. Is guided by a raceway plate 34 constituting a guide mechanism 33 and a pair of left and right position displacement guide bars 35 disposed opposite to the raceway plate. The members 36 and the like can be used to displace outwardly from each other (see FIG. 13).

(9) Applying / Unlocking with Manual Operating Force As shown in FIG. 14, the manual operating force is applied from the Dharma 5 side to the second engaging portion 23 of the clutch plate 21 through the engaging projection 4 a of the drive arm 4. When transmitted, the clutch plate 21 rotates alone in a predetermined direction. Then, since the arcuate outer peripheral surface of the engaging claw piece 26 slides on the arcuate inner peripheral surface of the ratchet tooth 16, each engaging claw piece 26 supports the projection shaft 27 against the spring force of the biasing means 29. To displace inside.

  Therefore, the engagement claw 28 at the other end of each engagement claw piece 26 does not mesh with the ratchet teeth 16, and the clutch plate 21 rotates at least by a required amount. In this embodiment, the engagement protrusion 4a of the drive arm 4 is guided by the guide mechanism 33 having an elliptical orbit, so that the circularly constant trajectory is the same as in the case of application / unlocking by the drive force of the drive motor. (Similar to FIG. 11).

  The engaging claw piece 26 of the embodiment engages with the ratchet teeth via the urging means 29, but suction means may be used instead of the urging means 29. FIGS. 15A and 15B are examples of the adsorption unit 29A. For convenience of explanation, the suction means 29A is provided at the engaging claw portion of one engaging claw piece 26 and the engaging surface portion of one ratchet tooth 16, but the other engaging claw pieces 26 and ratchet teeth are provided. The same applies to 16. The attracting means 29A is fixed (embedded or the like) to the first magnet 29a fixed to the engaging claw piece 26 and the ratchet teeth 16 or the clutch gear 11 at an appropriate position, and has the polarity of the first magnet 29a. The engaging claw piece 26 itself may have a magnetic function (commonly referred to as “plamag”).

  The present invention is mainly used in the locksmith and joinery industries.

FIG. 1 to FIG. 14 are explanatory views showing the best embodiments of the present invention. (A), (b) of FIG. 15 is schematic explanatory drawing which shows the example of a design change of the principal part of this invention.
BRIEF DESCRIPTION OF THE DRAWINGS Schematic explanatory drawing which shows the environment and principal part of 1st Example. Schematic explanatory drawing of main parts (clutch plate). The schematic explanatory drawing of the member which comprises a clutch mechanism (the explanatory drawing from a perspective view, only one engagement claw piece and urging means are shown). The front view of a clutch gearwheel. Each front view of the clutch board (a) and engagement claw piece (b) which comprise a clutch member. FIG. 6 is an enlarged sectional view taken along line 6-6 in FIG. Schematic cross-sectional explanatory diagram of the state where the main parts are combined Schematic explanatory drawing which shows the mounting position of the urging means for engaging claw pieces. (A) The disassembled perspective view which shows the positional relationship of an engaging claw piece and a biasing means. (B) is a schematic cross-sectional explanatory drawing when the urging means is attached to the engaging claw piece. The schematic explanatory drawing which shows the engagement state of an engaging claw piece when a clutch gearwheel rotates to one direction with the drive force of a drive motor. The schematic explanatory drawing which shows the rotation direction of a clutch gearwheel and a clutch board in the case of FIG. FIG. 11 is a schematic explanatory diagram showing the movement of a drive arm, a dharma, etc. in the case of FIG. 10. In the case of FIG. 10, the conceptual diagram which shows the track | orbit (trajectory) of the engagement protrusion of a drive arm when application and unlocking are repeated. The schematic explanatory drawing in case a clutch board rotates independently to a predetermined direction based on manual operation force. (A) And (b) is each schematic explanatory drawing which shows the example of a design change of the principal part (engagement claw piece biasing means), (a) shows the state which the engagement claw piece spread to the radial direction. . (B) is the opposite.

Explanation of symbols

X ... electric lock, Y ... clutch mechanism, 1 ... control unit, 2 ... drive motor, 3 ... gear transmission means, 4 ... drive arm, 4a ... engagement protrusion of the drive arm, 5 ... dharma, 6 ... crank arm, 7 DESCRIPTION OF SYMBOLS ... Dead bolt, 8 ... Dharma urging means, 10 ... Clutch shaft, 11 ... Clutch gear, 12 ... Gear portion, 13 ... Center shaft portion, 14 ... Through hole (shaft hole), 15 ... Annular recess, 16 ... Ratchet teeth, 21 ... clutch plate, 22 ... first engagement portion, 23 ... second engagement portion, 24 ... center hole, 25 ... spring end support portion, 26 ... engagement claw piece, 27 ... projection shaft, 28 ... Engaging claws, 29, 29A ... biasing means, 33 ... guiding mechanism for engaging projections.

Claims (6)

In an electric lock clutch mechanism having a clutch gear for transmitting a driving force of a drive motor controlled by a control unit to a dharma side, a clutch plate and an engaging claw piece are combined with the clutch gear, and one end portion of the engaging claw piece Is supported by the clutch plate via a coupling means, and the other end is engaged with and disengaged from a ratchet tooth formed in the recess of the clutch gear, and the clutch gear receives a driving force from the drive motor side in a predetermined direction. When it rotates, the other end of the engaging claw piece engages with the ratchet teeth, so that the clutch plate rotates together with the clutch gear, while the operating force from the Dharma side is transmitted to the clutch plate via the drive arm. When this is done, the other end of the engaging claw piece does not mesh with the ratchet teeth, and the clutch plate rotates at least a required amount. 2. The electric lock clutch mechanism according to claim 1, wherein the control unit controls the drive motor so that the clutch gear repeatedly rotates in one direction. In claim 1 or claim 2, when the clutch gear rotates in one direction, the clutch plate also rotates in the same direction, whereby the engagement projection of the drive arm has a circular trajectory by the guide mechanism including the raceway plate. An electric lock clutch mechanism characterized by repetition. 2. The clutch mechanism for an electric lock according to claim 1, wherein the engaging claw piece engages with the ratchet teeth through the biasing means or the suction means. 2. The ratchet teeth according to claim 1, wherein a plurality of ratchet teeth are formed on the inner peripheral surface of the recess with a predetermined interval, while the engaging claw piece is a linkage including a first engaging portion on a disc-shaped ratchet plate. A clutch mechanism for an electric lock, wherein a plurality of shafts are pivotally supported via the means. The clutch plate according to claim 1, wherein the clutch plate is fitted in a stepped recess of the clutch gear, and has a first engagement portion that engages with an engagement claw piece on one side surface thereof. An electric lock clutch mechanism having a second engagement portion that engages with the drive arm on the other side surface.

Images