JP2743065B2 - Latch mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latch mechanism for removably locking an accessory of various main bodies.

[0002]

2. Description of the Related Art For example, when a lamp shade as an accessory is locked to a lighting equipment main body which is a typical example of the main body, as conventionally suggested from FIGS. On the shade support arm (2) of the main body (1),
A stud bolt (3) is planted and integrated, and a slide cover (6) that moves forward and backward using the support arm (2) as a rail is fixed to a locking claw (5) of the ramp shade (4).

Then, the engaging claw (5) is advanced and retracted along the elongated guide hole (7) for receiving the stud bolt formed in the slide cover (6), and the stud bolt (3) is operated. ) To cap nut (8)
Are tightened and fixed.

[0004]

However, in this case, it is necessary to tighten or loosen the cap nut (8), and at this time, there is a possibility that the locking claw (5) may come off from the shade support arm (2). Therefore, it is very troublesome to engage and disengage the lamp shade (4).

If the cap nut (8) is not firmly tightened or is subjected to vibration or impact during use, the locking claw (5) moves loosely and the lamp shade (4) moves. There is a danger of falling, and that is why the stud bolt (3) and cap nut (8)
Increasing the number of installed lamps results in an increasingly complicated operation of engaging and disengaging the lamp shade (4).

[0006]

SUMMARY OF THE INVENTION The present invention intends to drastically solve the above-mentioned problem. For this purpose, a versatile latch mechanism having an inverted U-shaped cross section which forms a part of a main body is provided. The attached accessory support rail and the base end mounted inside the support rail allow the remaining free distal end to be constantly pushed up and kept in a biased state, and also to the distal end of the support rail. With a movable claw that locks and detaches the accessory of the main body,

The movable claw is shaped into a forked fork that can be clamped to the accessory support rail, and a connecting block is integrally interposed in the middle of the movable claw, and a pivot pin is also inserted through the base end. On the other hand, at the tip of the accessory support rail, a notch receiving notch for receiving the connecting block of the movable claw, and near the tip, a pair of opposed reciprocating arms for moving the pivot pin of the movable claw forward and backward. The guide elongated hole and the spring leading hole for leading the free tip of the leaf spring upward are formed correspondingly, and the free leading end of the leaf spring led out from the spring leading hole is used as an operating lever for pushing down. From the middle part, a pair of opposing cam pieces that block the pivot pin of the movable claw are made to stand up,

When the movable claw is pushed rearward along the advance / retreat guide elongated hole of the accessory support rail, the cam pin of the leaf spring is pushed down and received in the claw receiving notch of the support rail. The movable claw, which is non-rotatably held at two places with the connection block, can lock the accessory of the main body to the leading end of the support rail in a locked state, and from that state, operates the operating lever of the leaf spring. When the movable claw is pushed down and pulled forward along the guide hole of the support rail, the connecting block is disengaged from the claw receiving notch of the support rail, and the movable block is rotated around the pivot pin. Movable claw,
The present invention is characterized in that the relation is set so that the locked state of the accessory to the support rail can be released.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific structure of the present invention will be described below in detail with reference to the drawings. FIGS. 1 to 28 show a latch mechanism (A) of the present invention applied to a lighting fixture for comparison with the prior art. (10) is a lighting fixture body as a main body, and (11) is a lamp shade as an accessory thereof, which is detachably engaged with the lighting fixture body (10). Therefore, the latch mechanism (A) is used.

As shown in FIGS. 1 and 2, the lighting fixture body (10) has a circular metal saucer plate (12) having a diameter different from that of a metal tray.
From (13) through a plurality of small screws (14), they are fixed and integrated in a concentric lamination state. (15) is a mounting plate for a rosette which is also mounted and fixed to a central portion thereof with a small screw (16), and (17) is a set of three pieces distributed around the peripheral portion thereof, as a set of three pieces. ) Is a lamp holder attached to the lower surface of
The ring-shaped fluorescent lamp (18) is received and moored by the set. (19) indicates the ballast, (20) indicates a terminal block, and (21) indicates a glow lamp.

On the other hand, the lamp shade (11) is formed from an acrylic resin such as milky white into a conical saucer shape larger in diameter than the lighting fixture body (10) as shown in FIGS. The fluorescent lamp (18) is entirely encapsulated from below. (22) is the lamp shade (11)
Is a synthetic resin protection molding attached to the upper edge of the opening, and has a U-shaped cross section. (23) is a decorative molding similarly fitted to the conical trunk surface of the lamp shade (11), which is formed into an O-ring type from synthetic resin.

In this case, as apparent from the modified examples shown in FIGS. 4 and 5, a reinforcing ring (24) made of the same acrylic resin as that of the lamp shade (11) in the form of a flat plate is connected to the opening of the lamp shade (11). By adhering or welding to the upper edge from above and attaching the protective molding (22) to both, the lamp shade (11) is kept in a state where it does not cause irregular deformation such as distortion or bending. Is preferred.

(25) and (26) are the lighting fixture main body (1).
0), one pair of adjacent first and second shade support rails forming a part of FIG.
As is clear from comparison with No. 1, the lighting fixture body (10) is formed from a metal plate and has the same inverted U-shaped cross section.
Are mounted and fixed in a generally radially symmetric arrangement by a plurality of machine screws (27) on the lower surface of the. Moreover, both the first and second shade support rails (25) and (26) are horizontally extended by a predetermined length horizontally from the peripheral portion of the lighting fixture body (10) as shown in FIGS. I have.

However, the first and second shade support rails (25) and (26), which are independent and independent of the lighting fixture body (10) in advance.
Instead of fixing the lighting fixture body (10) to the lighting fixture body (10) with small screws (27), the lighting fixture body (10) itself is enlarged to a size corresponding to the lamp shade (11), and The first and second shade support rails (25) (2) are formed by plastically deforming the plate surface into an inverted U-shaped cross section.
6) It may be installed continuously and integrally.

(28) and (29) are attached to the leading end portions of the first and second shade support rails (25) and (26), and are movable with fixed claws for locking the peripheral edge of the ramp shade (11). There are two types of nails, but as the same metal product, a hook piece (30) and a mounting piece (31) that are substantially F-shaped and continuous in a side view as shown in FIGS. From a pair of right and left and a connecting block (32) interposed in the middle of the mounting piece (31), a two-forked fork type in a plan view that can be sandwiched between the first and second shade support rails (25) and (26). It is shaped. (33) is a relief notch for the protective mall provided at the boundary between each hook piece (30) and the mounting piece (31), and (34) is an opening distributed at the base end of each mounting piece (31). Needless to say, the pair of front and rear pin receiving holes has a circular shape.

As shown in FIGS. 16 and 17, each of the two pairs of the fixed claws (28) is inserted into the pin receiving hole (34) with the first shade support rail (25) sandwiched in the left-right direction. To the pin receiving hole (35) which opens corresponding to the vicinity of the tip of the first shade support rail (25),
A pair of front and rear fixing pins (36) which are inserted horizontally and penetrated are attached and fixed to the first shade support rail (25).

On the other hand, the movable claw (29) forms the latch mechanism (A) of the present invention, and a pair of the movable claws (29) is pivotally mounted on the second shade support rail (26) as follows. The lamp shade (1)
The peripheral edge of 1) can be detachably locked to the lighting fixture body (10) side.

That is, in the example of use shown in the figure, the fixed claw (2
By rotating a pair of movable claws (29) adjacent to each other for a total of four (8) and movable claws (29), the lamp shade (11) is moved to the side of the lighting fixture body (10). It can be attached to or detached from the second shade support rail (26), so that the fluorescent lamp (18) can be easily replaced.

The details of the above-mentioned latch mechanism (A) will be described. Referring to FIGS.
7) a pair of left and right substantially U-shaped claw receiving notches provided on the second shade support rail (26) and having a widened distal end for receiving the connecting block (32) of the movable claw (29); (38) is also a pair of parallel left and right guide slots formed in the front and rear of the second shade support rail (26) in the vicinity of the front end, and (39) is also open in the upper surface near the front end. Spring outlet hole
The tip of a leaf spring described below is led upward.

In a state where the pair of movable claws (29) sandwich the second shade support rail (26) from the left and right directions, the pair of movable claws (29) move from the pin receiving hole (34) to the advance / retreat guide elongated hole (38). One pivot pin (40) which is inserted horizontally and penetrates its second shade support rail (2).
6) are rotatably attached to the respective parts. The base end side (rear side) of the pair of front and rear pin receiving holes (34) distributed in the opening on the mounting piece (31) of the movable claw (29).
The pivot pin (40) penetrates and traverses one of them.

In that case, the second shade support rail (26)
When the movable claw (29) is pulled out forward along the advance / retreat guide slot (38), the connecting block (32) of the movable claw (29) is engaged with the claw receiving notch (2) of the second shade support rail (26). 37), the movable claw (2
9) freely rotates about the pivot pin (40).

Also, the second shade support rail (26)
The movable claw (2)
When the operator presses 9) backward, the movable claw (29)
Connecting block (32) of the second shade support rail (2)
Since the movable claw (29) is received and restrained in the claw receiving notch (37) of (6), the movable claw (29) has two second shade support rails (26) at the connection block (32) and the pivot pin (40). ) Is held non-rotatably.

(41) is the second shade support rail (2)
6) a leaf spring having a predetermined length (L) and a band width (W) partially extending along the inside of the movable claw (29);
In order to prevent the unexpected reciprocating action and the turning action, the following shaping is performed.

That is, in FIGS. 26 to 28 showing this, reference numeral (42) denotes a horizontal mounting base forming the base end of the leaf spring (41), and the second side support rail (2)
6) A pair of screws (43) that are joined from below, and
Will be integrated.

Reference numeral (44) designates a push-down operation lever which also forms a free tip of the leaf spring (41), and passes through a spring lead-out hole (39) formed on the upper surface of the second shade support rail (26). The upper end portion is bent substantially horizontally as a stopper (45), and does not sink from the upper surface of the second shade support rail (26). It has become. Here, the fingertip of the operating hand can be applied to push down the leaf spring (41).

A halfway portion of the leaf spring (41) extends from a lower end of the operating lever (44) to a horizontal bottom surface (46).
The mounting base (4) is interposed via the upwardly inclined surface (47).
2), and is covered so that the horizontal bottom surface (46) does not naturally protrude downward from the second shade support rail (26) and is not exposed.

(48) is bent and raised at a substantially right angle from the horizontal bottom surface (46) of the leaf spring (41) by a certain height (H) capable of blocking the pivot pin (40) of the movable claw (29). A pair of left and right cam pieces, the front edge of which is the movable claw (2
9) As a retracting guide surface (48f) for a pivot pin in a rearwardly inclined state that allows the pushing operation, and a vertical pin advance control surface for a vertical pivot pin whose rear edge also prevents the movable claw (29) from being pulled out. (48r).

However, the leaf spring (41) has a mounting base (4) at its base end with respect to the second shade support rail (26).
Using the fulcrum as the fulcrum, the operating lever (4
4) is in a state where the pressure is constantly increased. Therefore, by pressing down the operation lever (44) while resisting the urging force, the locking state between the cam surface (48) and the pivot pin (40) is changed. It can be unraveled artificially and its movable claw (29) can be pulled forward from the second shade support rail (26).

In the illustrated use example, the first and second shade support rails (25) on the side of the lighting fixture body (10), which is the main body, are used.
(26) The lamp shade as its accessory (11)
Are fixed via two types of fixed claws (28) and movable claws (29), for a total of four lampshades (11).
Can be removed by operating each of the latch mechanisms (A) as follows.

That is, the operating lever (44) of the leaf spring (41) forming the latch mechanism (A) is pushed down by the fingertip of one hand as shown in FIG. The piece (48) is also lowered to release the locked state between the vertical pivot pin advance regulating surface (48r) and the pivot pin (40) of the movable pawl (29). 29) can be pulled out forward with a fingertip of one hand remaining along the advance / retreat guide slot (38) of the second shade support rail (26) as shown in FIG.

The movable claw (29) pulled out rotates around the pivot pin (40) and opens to the retracted state from the lamp shade (11) as shown in FIG. 11) can be quickly and reliably removed from the first and second shade support rails (25) and (26) on the lighting fixture body (10) side by pulling the fluorescent lamp (18) out of the fixed claw (28). ) Can be performed conveniently and easily.

On the other hand, the lamp shade (11) is again transferred to the first and second shade support rails (2) on the side of the lighting fixture body (10).
5) When locking to (26), fix it to the fixed claw (2).
8) and the movable claw (2)
9) may be pushed rearward as shown in FIG. 25 along the advance / retreat guide slot (38) of the second shade support rail (26) while also holding the fingertip of one hand.

Then, in the process of retracting the pivot pin (40) of the movable claw (29), the leaf spring (4)
1) The cam piece (48), which is suspended from 1), rides smoothly on the reversing guide surface (48f) for the pivot pin and pushes down its leaf spring (41), while also connecting the movable pawl (29). (32) enters the claw receiving notch (37) of the second shade support rail (26).

Then, the connecting block (32) is received by the claw receiving notch (37), and the pivot pin (40) passes through the cam piece (48), and the cam piece (48) is raised and restored by itself. At the final point in FIG. 21 where the advancement is restricted by the advancement restricting surface (48r) of FIG. 48, the movable claw (29) is locked with the ramp shade (11) locked so as not to rotate. Result.

In the example of use of FIGS. 1 to 28 described above, separate and independent lamps are attached to the first and second shade support rails (25) and (26) on the side of the luminaire main body (10) which is the main body. A pair of adjacent two movable claws (29) forming a latch mechanism (A) and a fixed claw (2)
8) The two kinds of two adjacent pairs are locked by a total of four. However, the openable / closable lamp shade (11) is pivotally supported in advance on the lighting fixture body (10) side. The latch mechanism (A) of the present invention can be used as it is even when the peripheral portion of (1) is locked in a state of being closed to the lighting fixture body (10) side.

In other words, FIGS.
As is apparent from 31, the hook (30a) of one of the fixing claws (28a) is moved to the periphery of the ramp shade (11).
While being fixed by a plurality of screws (49), one pivot pin (50) is also pierced across the mounting piece (31a) of the fixing claw (28a) and the tip of the first shade support rail (25). Then, the lamp shade (11) is suspended around the pivot pin (50) so that the lamp shade (11) can be opened and closed.

A total of three movable claws (29) having the structure described with reference to FIGS. 1 to 28 are used, and by applying each of the latch mechanisms (A), the peripheral edge of the ramp shade (11) is locked. And the second shade support rail (26) on the luminaire body (10) side is fixedly maintained in a closed state. Since other configurations and operations are substantially the same as those of the above-described embodiment of FIGS. 1 to 28, only the reference numerals corresponding to FIGS. 1 to 28 are entered in FIGS. I do.

Further, FIGS. 1 to 31 show an embodiment of the present invention applied to a ceiling-mounted lighting fixture, in which the latch mechanism (A) has a horizontally mounted shade support rail (2).
By attaching to the tip of 6), the movable claw (29)
Locks the lamp shade (11) so as to cover the lamp shade (11) from below. However, as suggested by various usage examples in FIGS. The direction in which the movable claw (29) is locked can be freely selected.

For example, as shown in FIG. 32, the main body is a bracket (10a) attached to and fixed to the wall surface of a building, and the latch mechanism (A) corresponding to the fixing claw (28) at the lower end thereof is connected to the bracket (10a). The movable claw (29) is attached to the upper end of the lampshade (11).
The peripheral part of a) can be used so as to be locked from above.

In addition to the above-mentioned lighting equipment, for example, FIG.
A base (10) attached and fixed to the wall of a building such as
b) is used as a main body, and an accessory (11b) such as a forehead, a blackboard, or a sign is locked by a movable claw (29) of a latch mechanism (A) attached to the main body. However, the main body is used as a base material for the roof of a building, and the movable claw (29) of the latch mechanism (A) attached thereto is used to lock a lighting window or the like as an accessory from above. However, the present invention can be widely used, and the shape of the fixing claw (29) can be varied depending on various types of accessories.
It may be modified appropriately.

[0041]

In summary, in the latch mechanism (A) of the present invention, an accessory support rail (26) formed in an inverted U-shape in cross section, which constitutes a part of the main body (10) due to its structure,
Since the base end is attached to the inside of the support rail (26), the leaf spring (41) which is constantly pushed up from the remaining free distal end and kept in a biased state, and the support rail (2).
A movable claw (29) for engaging and disengaging an accessory (11) of the main body (10) to the tip of (6);

The movable claw (29) is shaped into a forked fork that can be clamped on the accessory support rail (26), and a connecting block (32) is integrally interposed in the middle of the movable claw (29). The end portion of the accessory support rail (26) has a claw receiving notch (37) for receiving the connecting block (32) of the movable claw (29), while a pivot pin (40) penetrates and crosses the end portion. In the vicinity of the distal end, a pair of opposed reciprocating guide slots (38) for moving the pivot pin (40) of the movable claw (29) forward and backward and the free distal end of the leaf spring (41) upward. A spring leading-out hole (39) to be led out is formed correspondingly, and a free distal end portion of the leaf spring (41) led out from the spring leading-out hole (39) is used as an operating lever (44) for pushing down. ) From the middle A pair of cam pieces facing to cut off the pivot pin of the movable claw (29) (40) (48) by Shideritsu,

When the movable claw (29) is pushed backward along the advance / retreat guide slot (38) of the accessory support rail (26), the cam piece (4) of the leaf spring (41) is operated.
8) The pivot pin (40) that has pushed down and passed therethrough and the connecting block (32) received in the claw receiving notch (37) of the support rail (26). The attachment (11) of the main body (10) can be locked to the leading end of the support rail (26) by the claw (29), and the leaf spring (41) can be locked from that state.
Push down the operating lever (44) of the movable claw (2
9) is inserted into the guide hole (3) of the support rail (26).
When the pull-out operation is carried out forward along 8), the connecting block (32) is detached from the claw receiving notch (37) of the support rail (26), and rotates around the pivot pin (40). Since the movable claw (29) is set so as to be able to release the locked state of the accessory (11) with respect to the support rail (26), the problem of the prior art described at the beginning can be surely solved. Yes, its main body (1
Although the attachment / detachment operation of the accessory (11) with respect to (0) can be performed quickly and simply, the effect of keeping the accessory (11) locked to the main body (10) in a stable and firmly locked state can be obtained. Yes, excellent versatility.

[Brief description of the drawings]

FIG. 1 is a plan view of a lighting device to which a latch mechanism according to the present invention is applied.

FIG. 2 is a partially cutaway sectional view of FIG. 1;

FIG. 3 is a partially cutaway sectional view showing a lamp shade extracted.

FIG. 4 is an exploded perspective view showing a modified example of the ramp shade.

FIG. 5 is an assembled sectional view showing a part of FIG. 4;

FIG. 6 is a side view extracting and showing a first shade support rail.

FIG. 7 is a plan view of FIG. 6;

FIG. 8 is a sectional view taken along line 8-8 in FIG. 7;

FIG. 9 is a side view extracting and showing a second shade support rail.

FIG. 10 is a plan view of FIG. 9;

FIG. 11 is a sectional view taken along line 11-11 of FIG. 10;

FIG. 12 is a side view showing a movable claw extracted from a latch mechanism.

FIG. 13 is a plan view of FIG.

FIG. 14 is a sectional view taken along line 14-14 of FIG. 12;

FIG. 15 is a sectional view taken along line 15-15 of FIG. 13;

FIG. 16 is a plan view showing an attached state of a fixing claw.

FIG. 17 is a side sectional view showing a state in which a lamp shade is locked by the fixing claw.

FIG. 18 is a side view showing a state where the lamp shade is locked by the movable claw.

FIG. 19 is a plan view of FIG. 18;

FIG. 20 is an enlarged sectional view taken along line 20-20 in FIG. 18;

FIG. 21 is a sectional view taken along line 21-21 of FIG. 19;

FIG. 22 is a side sectional view showing a process of pressing down a leaf spring.

FIG. 23 is a side sectional view showing a process of pulling out the movable claw.

FIG. 24 is a side sectional view showing a rotating operation process of the movable claw.

FIG. 25 is a side sectional view showing the reverse pushing operation process of the movable claw.

FIG. 26 is a side view showing a leaf spring extracted.

FIG. 27 is a plan view of FIG. 26;

FIG. 28 is a sectional view taken along line 28-28 of FIG. 27;

FIG. 29 is a plan view showing another example of use corresponding to FIG. 1;

30 is a partially cutaway sectional view of FIG. 29.

FIG. 31 is a partially enlarged sectional view taken along line 31-31 of FIG. 29;

FIG. 32 is a schematic perspective view of the present invention applied to another lighting fixture.

FIG. 33 is a schematic perspective view of the present invention applied to mounting of a signboard, a forehead, and the like.

FIG. 34 is an exploded perspective view showing a conventional technique.

FIG. 35 is a perspective view showing the assembled state of FIG. 34;

[Explanation of symbols]

 (10) ・ Main body (lighting fixture main body) (11) ・ Accessories (lamp shade) (25) ・ First shade support rail (26) ・ Second shade support rail (28) ・ Fixed claw (29) ・ Movable Claw (32), connecting block (37), notch for catching claw (38), elongated hole for advance / retreat guide (39), spring outlet hole (40), pivot pin (41), leaf spring (44), operation lever (48) ) ・ Cam piece (A) ・ Latch mechanism

Claims (1)

(57) [Claims] An accessory support rail (26) formed in an inverted U-shaped cross-section forming a part of a main body (10), and a base end portion mounted inside the support rail (26). And a leaf spring (41) which is constantly pushed up from the remaining free tip and kept in a biased state, and an attachment (11) of the main body (10) is detachably engaged with a tip of the support rail (26). And a movable claw (29) for stopping the movable claw (29). The movable claw (29) is shaped into a forked fork that can be clamped to the accessory support rail (26), and a connecting block (32) is provided in the middle thereof. In the same manner, a pivot pin (40) is penetrated and traversed at the base end, and a connecting block (32) of the movable claw (29) is attached to the tip of the accessory support rail (26). Notch (37) for catching nails A pair of opposed guide / retreat guide slots (38) for moving the pivot pin (40) of the movable claw (29) in the front-rear direction and a spring lead-out hole (39) for leading the free tip of the leaf spring (41) upward. And a leaf spring (41) led out of the spring lead-out hole (39).
Of the movable claw (29) from the middle part of the leaf spring (41), and a pair of facing cam pieces (48) are suspended from the middle part of the leaf spring (41). When the movable claw (29) is pushed backward along the extension / retraction guide slot (38) of the accessory support rail (26), the cam piece (48) of the leaf spring (41) is pushed down. The passed pivot pin (40) and the support rail (26)
The main body (10) is moved to the distal end of the support rail (26) by the movable claw (29) which is non-rotatably held at two places with the connection block (32) received in the claw receiving notch (37). ) Can be locked in the locked state, and from that state, the operating lever (44) of the leaf spring (41) can be locked.
When the movable claw (29) is pulled out forward along the advance / retreat guide slot (38) of the support rail (26), the connection is made through the claw receiving notch (37) of the support rail (26). When the block (32) is detached and the movable claw (29) that pivots around the pivot pin (40) is released, the locked state of the accessory (11) with respect to the support rail (26) can be released. A latch mechanism characterized in that: