JP4614336B2 - Dial lock latch mechanism - Google Patents

Description

  The present invention relates to a latch mechanism for a dial lock (hereinafter simply referred to as a latch mechanism), and more particularly to a latch mechanism that does not generate noise during opening / closing operation of the dial lock.

  The dial lock has an inner cylinder 2 that is fixed to, for example, a cover plate 1 (see FIG. 1) of a mail box, as is well known or described in FIG. Then, the outer ring 3 and the inner ring 4 which are fitted to the inner cylinder 2 so as to be independently rotatable are turned and unlocked by turning the knob 6 (see FIG. 1) of the dial 5.

  Slits 7 (see FIG. 6c) are respectively formed at predetermined angular positions of the outer ring 3 and the inner ring 4, and the slits 7 and 7 at arbitrary angular positions as shown in FIG. When the dial 6 is rotated clockwise and counterclockwise to be converted into a clock face and aligned at, for example, an angular position of 9 o'clock (see FIG. 6b), the dial lock is unlocked.

And in the dial lock described in patent documents 1 and 2 mentioned later, the latch 5 which has 2 degrees of freedom and was urged | biased in the restoring direction by operation which opens the said cover plate 1 (FIG. 4 of patent document 1). Is engaged so as to escape into the slits 7 and 7 aligned at a predetermined angular position, and as a result, the latch 5 and the engagement piece 21 (see FIG. 3 of Patent Document 1) in the mailbox are engaged. Can be opened and the lid can be opened.
Japanese Patent Publication No. 09-006307 Patent gazette related to Japanese Patent No. 3139629

  As is clear from the above-described structure, the conventional dial lock, when the cover plate is opened and the latch and the engagement piece are disengaged, the released latch is suddenly rotated in the restoring direction by the urging force. A large impact sound is generated by colliding with other components of the dial lock.

  For example, in an apartment or a condominium, this impact sound resonates with the post box, other post boxes stacked up and down, left and right, or the entrance hall. There is an inconvenience of becoming a loud sound.

  The present applicant has previously proposed a silencer for a dial lock that cushions a collision sound at the time of restoration of a latch, using Patent Documents 1 and 2 described above.

  However, these silencers have the same latch as the conventional one, and a resistor is inserted into a member that collides with the latch or a member that comes into sliding contact with the latch when the latch is moved. There is still room for improvement, such as the possibility of reducing the noise reduction effect.

  Therefore, the present invention provides a latch mechanism that does not generate noise due to its operating principle, and has an object to eliminate inconvenience caused by the generation of noise.

  In order to achieve the above object, the invention according to claim 1 is provided so that the outer ring and the inner ring can be rotated independently of each other and are arranged on the outer and inner rings of the outer ring and the inner ring supported coaxially. Each of the slits is formed, and a knob is coaxially coupled to either the inner ring or the outer ring, and the knob is connected to a dial mechanism that aligns the inner and outer slits at a certain angular position. An inner cylinder in which the dial mechanism is housed in the outer end opening, an inner cylinder flange is formed on the outer peripheral surface of the outer end, and a plurality of guide shoes project from the inner surface of the inner cylinder flange; The outer cylinder is slidably fitted to the inner cylinder, and an outer cylinder flange having a larger diameter than the inner cylinder flange is integrally provided on the outer end opening edge to form a dead ring, and the outer cylinder is formed. Formed on flange The outer cylinder with a circular arc-shaped through hole engaged with the guide shoe, and the inner end of the inner cylinder are slidably guided in a state of being prevented from rotating, and the dial of the dial mechanism is guided to the outer end. The slider has a probing portion that can be engaged with the screw, the spiral drive groove formed at the inner end of the outer cylinder, and the outer surface of the slider that protrudes through the inner cylinder and slides with the drive groove. A slide pin that engages with the outer cylinder and a dead block that protrudes from the outer peripheral surface of the outer cylinder, and the inner end of the outer cylinder and the inner cylinder is inserted from the outside into a mounting hole such as a cover plate of the post box. Fix the guide shoe of the cylinder to the outer surface from the inside of the cover plate, and after the dial mechanism is locked and unlocked, rotate the dead ring of the outer cylinder in the specified direction and drive the probe in the slit direction of the dial mechanism It was made to do.

  The latch mechanism according to the first aspect of the present invention configured as described above is configured to project on the outer peripheral surface of the outer cylinder by turning the dead ring and driving the probe in the slit direction after the dial mechanism is locked and unlocked. Since the dead block and, for example, the locking piece in the post box are quasi-statically mounted, there is an expected effect that no noise is generated on the operating principle.

  A slider guided to be slidable in the axial direction of the inner cylinder with the inner cylinder being detented is composed of a slide pin protruding from the slider and a spiral drive groove formed at the inner end of the outer cylinder. It is driven quasi-statically by the wedge action between them, and the probe protruding from the outer end of the slider is moved in the slit direction of the dial mechanism, and the dead block is rotated only when the dial mechanism is unlocked. Since it can be moved, the member that moves rapidly in the latch mechanism is eliminated, and the generation of dial-like noise can be completely prevented.

Embodiments of the present invention will be described below with reference to the drawings.
1 and 2, reference numeral 8 denotes a dial mechanism. The dial mechanism 8 is a combination of inner and outer rings 4 and 3 and a dial 5 or knob 6 that can be engaged with each other via the tacks 9 and 9. Since the structure itself is well known and described in Patent Documents 1 and 2, further detailed description is omitted.

  1 and 2, reference numeral 2 denotes an inner cylinder. The inner cylinder 2 has a dial mechanism 8 attached to the outer end opening (the right end opening in FIG. 2), and has a thick wall on the outer peripheral surface of the outer end. The inner cylinder flange 11 (see FIG. 2) is integrally formed and the cylinder is open at both ends.

  On the inner surface of the inner cylinder flange 11 (the left surface in FIG. 2), as shown in FIGS. Protrusively symmetrical.

  Further, as shown in FIGS. 1 and 2, a predetermined angular position of the inner cylinder 2 (in the illustrated embodiment, the angular position at 12 o'clock in terms of the clock face) will be described later along its generatrix. A non-rotating slit 13 that is slidably engaged with the slide pin is formed.

  On the other hand, in FIG. 1 and FIG. 2, reference numeral 14 indicates an outer cylinder. The outer cylinder 14 is slidably fitted to the inner cylinder 2, and has an outer edge (right end) opening edge having a larger diameter than the inner cylinder flange 11. It is the cylinder which formed the outer cylinder flange 15 (refer FIG. 3) with a ring bank part integrally.

  Incidentally, when the inner cylinder 2 is fitted into the outer cylinder 14 so that the inner end of the inner cylinder 2 is inserted into the outer end opening of the outer cylinder 14, as shown in FIG. 2, the inner cylinder flange 11 sinks into the ring portion. In addition, the ring portion having a knurl formed on the outer periphery becomes a dead ring 16 which is a key for operating the latch mechanism at the time of locking and unlocking (see FIGS. 1, 4 and 5).

  Further, as shown in FIG. 3, the outer cylinder flange 15 is provided with a pair of arc-shaped through holes 17 and 17, and the corresponding guide shoes 12 are movably engaged with the respective through holes 17. ing.

  These guide shoes and through-holes 17 define the relative movement angle of the outer cylinder 14 with respect to the inner cylinder 2 to a constant value.

  Incidentally, the inner cylinder 2 fitted to the outer cylinder 14 has an inner end inserted through a mounting hole 18 (see FIG. 1) opened in the cover plate 1, and the guide shoe 12 is attached to the cover plate 1 as shown in FIG. 2. It is fixed to the outer surface of the cover plate with an outer cylinder flange sandwiched between them by an unnumbered mounting screw called on the outer surface of the cover plate.

  Furthermore, as shown in FIGS. 1 and 4, a spiral drive groove 19 is provided on the outer peripheral surface of the inner end portion of the outer cylinder 14. In the illustrated embodiment, the width of the drive groove 19 is set to be substantially the same as that of the anti-rotation slit 13 (see FIG. 1).

  Further, as shown in FIGS. 1 to 3, a dead block 21 that protrudes in the radial direction is integrally formed on the outer peripheral surface of the outer cylinder at an angular position of 6 o'clock, for example, in terms of a clock face.

  This dead block 21 locks the cover plate by engaging from the inside with a locking piece (see the above-mentioned patent document) in the mail box when the mail box is locked, for example.

  On the other hand, as shown in FIGS. 1 and 2, a short cylindrical slider 22 is slidably guided to the inner end portion of the inner cylinder 2.

  At an angular position of 12 on the outer end surface of the slider 22 in terms of a clock face, a probe portion 23 that is, for example, a rectangular parallelepiped and protrudes outward is integrally formed.

  The width of the probe 23 is set to be slightly smaller than the width of the slit 7 (see FIG. 6) of the outer ring in the dial mechanism.

  Further, as shown in FIGS. 1, 2, and 4, a slide pin 24 protrudes from the outer peripheral surface of the slider 22 when viewed from the back and at an angle position of 12 o'clock in terms of a clock face. The slide pin 24 is slidably engaged with the anti-rotation slit 13 and the drive groove 19 of the inner cylinder in common.

  When the slide pin 24 engages with the anti-rotation slit 13, the slider 22 is prevented from rotating.

  It should be noted that the outer diameter of the slide pin is preferably set to be approximately the same as the width of the non-rotating slit 13 and the drive groove 19 so that the movement of each part is smooth without causing play when the dead ring is rotated.

  The latching mechanism according to the embodiment of the present invention configured as described above has a driving groove by rotating the dead ring 16 in a predetermined direction, for example, by rotating the dead ring counterclockwise in the state shown in FIG. The slider 22 moves outward, that is, in a direction close to the dial mechanism by a wedge action generated between the pin 19 and the slide pin 24.

  At this time, if the dial lock is not unlocked, in other words, if the slits 7 and 7 shown in FIG. Since the slider 22 is stopped by the end surfaces of the inner and outer rings 4 and 3 and the dead ring 16, the outer cylinder 14 and the dead block 21 integral therewith cannot be rotated, the relationship between the dead block 21 and the locking piece is prevented. I can't get along.

  On the other hand, when the dial lock is unlocked, in other words, when the slits 7 and 7 shown in FIG. 7, the dead block 21 can be rotated, so that the cover plate of the mail box equipped with the dial lock can be opened.

  At this time, there is no member that moves suddenly in the latch mechanism regardless of whether or not the dial lock is unlocked. As described above, no noise is generated unlike the conventional latch mechanism.

  In place of the engagement of the inner cylinder detent slit 13 and the slider slide pin 24 in the illustrated embodiment, a detent groove is formed on the outer peripheral surface of the slider 22 along its generatrix. An inner cylinder pin that slidably engages with the anti-rotation groove is protruded at a predetermined angular position on the inner surface of the inner cylinder (not shown).

  Naturally, the slit or opening through which the slide pin 24 is inserted is formed at the position where the anti-rotation slit 13 is formed.

BRIEF DESCRIPTION OF THE DRAWINGS The external appearance perspective view which expand | deploys and shows the structural member of the dial lock which has a latch mechanism by one Example of this invention. The longitudinal cross-sectional view of the dial lock which has a latch mechanism by one Example of this invention. The rear view. The plan view. The front view. The diagram which shows the operating principle of a dial lock.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cover plate 2 Inner cylinder 3 Outer ring 4 Inner ring 5 Dial 6 Knob 7 Slit 8 Dial mechanism 9 Stick 11 Inner cylinder flange 12 Guide shoe 13 Non-rotating slit 14 Outer cylinder 15 Outer cylinder flange 16 Dead ring 17 Through hole 18 Mounting hole 19 Drive groove 21 Dead block 22 Slider 23 Search part 24 Slide pin

Claims (1)

  An outer slit and an inner slit are formed on the outer circumference of the outer ring and the inner ring that are coaxially supported so that they can be rotated independently of each other. The knob is connected to the same axis and connected to a dial mechanism that aligns the inner and outer slits at a certain angular position by the operation of the knob, and the dial mechanism is housed in the outer end opening, An inner cylinder flange is formed on the outer peripheral surface of the outer end, and an inner cylinder having a plurality of guide shoes projecting from the inner surface of the inner cylinder flange is slidably fitted to the inner cylinder, and the outer end opening edge The outer ring flange having a larger diameter than the inner cylinder flange is integrally provided to form a dead ring, and the arc-shaped through hole formed in the outer cylinder flange is engaged with the guide shoe. Outer cylinder A slider that is slidably guided to the inner end of the inner cylinder in a state of being prevented from rotating, and has a probe projecting at the outer end that can be engaged with the slit of the dial mechanism; A spiral drive groove formed at the end, a slide pin projecting on the outer surface of the slider, penetrating through the inner cylinder and slidably engaging with the drive groove, and projecting on the outer peripheral surface of the outer cylinder A dead block is provided, and the inner end of the outer cylinder and inner cylinder are inserted from the outside into the mounting holes of the lid plate of the mailbox, and the inner shoe guide shoe is called from the inner side of the lid plate to the outer surface. Then, after the dial mechanism is locked and unlocked, a dial lock latching mechanism, wherein the dead ring of the outer cylinder is rotated in a predetermined direction to drive the probe in the slit direction of the dial mechanism.

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