TWM459270U - Lock latch assembly - Google Patents

Description

Latch assembly

The present invention relates to a latch assembly, and more particularly to a latch assembly that is mounted in a driven door of a split door for locking when the driven door is closed.

There is a split door on the market. The split door includes an active door and a driven door pivoted on the door frame. A set of door locks is arranged on one side of the active door, and the door lock is exposed on the side of the active door. a handle and a latch exposed on the end face, the rotating handle is operated by the door lock having a latch retracting, and the upper and lower ends of the driven door are each mounted with a latch assembly, each latch assembly including the exposed in the slave a driving latch on the end surface of the moving door and a latching head, the latching head of the latch assembly mounted on the upper end of the driven door is exposed on the upper end surface of the driven door, and the latch of the latch assembly mounted on the lower end of the driven door The lower end surface of the driven door is exposed outside the head system. When the driven door is closed, the upper latch is aligned with the slot of the door frame, the lower latch is aligned with the slot of the ground, and when the active door is closed, the active The end faces of the door press against the driving latches of the latch assemblies, and the latches of the latch assemblies are further displaced from the retracted latching position to the outside of the driven door and fit into the slot of the door frame and the slot of the floor. The upper latch position, causing the driven door to be unable to rotate and open, and active The door latch on the door is fitted with a driven, so take the initiative to open the door can not be rotated, so off-type doors can be securely locked. The latch assembly for use on a split door relies on the active door closing against the drive latch to interlock the latch head to achieve the purpose of locking, so that the slave door is in a position that has not been fully closed, due to the latch There is no alignment with the slot of the door frame and the ground. If the active door is closed and the drive latch is pressed, the latch will be displaced to the upper latch position. However, since the latches are not aligned with the slots, they cannot be smoothly displaced to the upper latch position. It is easy to cause damage to the structure inside the latch assembly. Moreover, such a latch assembly is susceptible to deformation of the internal parts due to the high temperature of the fire field in the fire field where the fire occurs, which may cause the respective latch heads originally located at the upper latch position to be displaced to the unlatching position due to the deformation of the parts. Further opening the split door may speed up the spread of the fire.

To this end, the present invention provides a latch assembly for a latch assembly, comprising a body including a locking end spaced apart along a first axial direction and a coupling end, the body further including a first axis a second axially extending transverse groove, a coupling hole extending from the surface of the body to the transverse groove, the body further comprising a longitudinal hole extending from the end face of the coupling end along the first axial direction to the transverse groove, the system along the first axis Displacement between the upper latching position and the unlatching position, the combined end of the body is to be used in conjunction with a connecting rod of a latch assembly to heat a barrier that will melt when heated to a high temperature, the blocking member The coupling hole of the body is coupled to an ear piece pivotally disposed in the transverse groove of the body, the ear piece comprises an upper end and a lower end, and the ear piece further comprises an inner side extending between the blocking and the engaging end, the ear piece can be Pivoting between the folding position and the blocking position, a top offset pin slidably mounted in the longitudinal hole in the first axial direction, the top abutting pin being movable in the first axial direction at the pushing position and the non-pushing position Displacement, a spring mounted in the longitudinal bore, the spring facing the ear along the first axis The upper end of the top bias offset.

When the blocking member is located in the coupling hole, the top abutting pin is in the non-pushing position, the ear piece is in the folded position, and the ear piece is not protruded outside the lateral groove.

When the blocking member is melted at a high temperature, the spring biases against the pin, causing the top abutting pin to be displaced from the non-pushing position to the pushing position, and the top abutting pin presses against the inner side of the ear piece, thereby pushing the ear piece to be displaced from the folded position to Block the position.

When the top offset pin is in the push-up position, the ear piece is in the blocking position, and the lower end of the ear piece protrudes outside the lateral groove, and the ear piece is in the blocking position to be used to prevent the body from being displaced from the upper latch position to the unlatching position.

The clip of the present invention can prevent the latch from being displaced from the latching position to the unlatching position by pivoting the earpiece to the blocking position when the fire occurs, thereby preventing the door from opening when the fire occurs, further preventing the latch from being opened. The speed at which fire and smoke spread. In addition, a commercially available similar latch assembly can prevent the door from opening when a fire occurs, after replacing the cost-created latch.

The present invention further provides a latch assembly having a latch head, comprising: a bracket including two side walls and an intermediate wall extending between the two side walls, each side wall including a first end spaced along a first axial direction And a second end, and a movable slot formed between the first end and the second end, each side wall further includes a first coupling hole formed between the first end and the movable slot, the middle wall of the bracket includes a notch And the intermediate wall is to be combined on one end surface of a driven door, driven The door is pivotable between a non-closed position in the open state and a closed position in the closed state, slidably coupled to a movable member between the two side walls of the bracket, the movable member including one perpendicular to the first axial direction a second axially spaced apart side, and a connecting surface extending between the two sides, each side comprising a first end and a second end spaced along the first axial direction, each side further comprising a second a first chute at the end, and a second chute near the first end, the first chute of the movable member is aligned with the movable slot of the bracket, and the movable member is disposed between the disengaged position and the engaged position along the first axial direction Displacement, a first coupling pin, passing through the two movable slots of the bracket and the two first sliding slots of the movable member, a second coupling pin, passing through the two first coupling holes of the bracket and the second second sliding slot of the movable member, An interlocking member pivotally connected to the movable member includes an end wall, the end wall includes a first end and a second end, and the first end of the linking member is pivotally connected with the first coupling pin, so that the linking member is defined by the first coupling pin The pivot axis pivots, a dial member is pivoted in the bracket, including the linkage member The second end is pivotally connected to a pushing end and a linking end, and the linking end faces the intermediate wall of the bracket, and is fixed to a locking member between the two sides of the movable member. The locking member comprises a body, and the locking member is Disposed between the disengaged position and the engaged position together with the movable member, disposed between the first engaging pin of the locking member, a spring, the spring biased locking member and the first engaging pin are spaced apart along the first axial direction a limiting frame fixed between the two side walls of the bracket, comprising a first wall and a second wall spaced along the first axial direction, and a connecting wall extending between the first and second walls, The first wall includes a through slot, the interlocking end of the dial member passes through the through slot and is located between the first and second walls, and is slidably disposed in a slot of the bracket, the drive latch includes a base, and the base includes an edge a first axially spaced apart first end surface and a second end surface perpendicular to the first and second axial directions, the drive latch further comprising a protrusion formed on the second end surface, the first end face of the drive latch Abutting against the interlocking end of the dial member, the driving latch is extended in the bracket along the third axial direction Displacement between the release position and the pressing position of the projection in the bracket, the displacement of the driving latch from the release position to the pressing position is pivoted by the pressing toggle member, causing the linkage member to interlock with the movable member from the disengaged position Position displacement, a connecting rod, comprising a first end and a second end combined with the locking member, a body coupled to the second end of the connecting rod, the body comprising a locking end spaced along a first axial direction a joint end, the body further comprising a transverse groove extending along a second axial direction perpendicular to the first axial direction, a coupling hole extending from the surface of the body to the transverse groove, the body further comprising an end face of the joint end along the first axis To a longitudinal bore extending into the transverse slot, the longitudinal bore of the body is coupled to the second end of the connecting rod, the body being displaced with the connecting rod along the first axial direction between the upper latching position and the unlatching position, the body being in the unlatching position When a blocking member that is received in the driven door and melts when heated to a high temperature. The blocking member is coupled with the coupling hole of the body, and is disposed on an ear piece in the lateral groove of the body. The ear piece includes an upper end and a lower end. The ear piece further includes an inner side extending between the blocking and engaging ends, the ear piece being pivotable between the folded position and the blocking position, and being slidably mounted in the longitudinal hole in the first axial direction The top offset pin is displaceable along the first axial direction between the abutting position and the non-pushing position, and a spring mounted in the longitudinal hole, the spring biasing the top offset pin toward the upper end of the ear piece along the first axial direction .

When the driving latch is in the release position, the slider is in the disengaged position, and the body is in the unlatching position, and the body is located in the unlatching position, which is used to be used with a slot of a door frame or a slot of a floor. One is not fitted, so the driven door can be pivoted between a closed position and a non-closed position.

When the driving latch is displaced from the releasing position to the pressing position, the first end surface of the driving bolt pushes the linking end of the dialing member, causing the second end of the linking member to be displaced, and thus the first coupling pin is interlocked by the first spring against the locking member The movable member is displaced from the disengaged position to the engaged position, and the body is displaced to the upper latch position, the slider is in the engaged position and the body is in the upper latch position, and the body is located in the upper latch position to be used when the driven door is in the closed position Either one of the slot of the door frame or the slot of the floor is fitted.

Displacement of the drive latch from the release position to the abutment position is to be used to move the linkage member along the first axial direction in the movable slot of the bracket by the push pin when the driven door is in the non-closed position. And compressing the first spring so that the movable member remains in the disengaged position and the body remains in the unlatched position to prevent damage to the latch assembly.

When the body is in the upper latch position and the blocking member is melted at a high temperature, the spring biases the top Offset, causing the top offset pin to be displaced from the non-pushing position to the pushing position, the top abutting pin pressing against the inner side of the first ear piece, thereby pushing the first ear piece to be displaced from the folded position to the blocking position.

When the top abutting pin is in the pushing position, the first ear piece is in the blocking position, and the engaging end of the first ear piece protrudes outside the lateral groove, and the first ear piece is located in the blocking position to prevent the body from being displaced from the upper latching position to the unlatching position .

The latch assembly can automatically cooperate with the active door to displace the latch to the upper latch position when the active door is closed, and when the latch is not aligned with the slot, the drive latch is pressed by the active door, but only the toggle member and linkage Pivoting, further compressing the spring by the first coupling pin, but the latch, activity The components, the locking member and the limiting member are not moved, and the latch assembly can be effectively protected from damage caused by misoperation; further, since the latching head and the driving bolt are interlocked, when the latch is smashed, the linkage is interlocked. The drive latch is displaced from the pressing position to the release position, but the drive latch is blocked by the active door and therefore cannot be displaced to the release position, so the latch head cannot be displaced to the unlatching position, thereby preventing the latch of the latch assembly of the present invention from being protected. The function of 撬.

10‧‧‧Latch assembly

20‧‧‧ bracket

22‧‧‧ side wall

24‧‧‧ first end

26‧‧‧ second end

28‧‧‧ first joint hole

30‧‧‧Second junction hole

31‧‧‧ door frame

32‧‧‧ Activity slot

33‧‧‧ Straight

35‧‧‧cross bar

36‧‧‧ gap

37‧‧‧Slots

38‧‧‧Intermediate wall

40‧‧‧ hook

42‧‧‧First card slot

44‧‧‧Second card slot

46‧‧‧ panel

48‧‧‧ openings

50‧‧‧Activities

52‧‧‧ side

54‧‧‧ first end

56‧‧‧ second end

58‧‧‧First chute

60‧‧‧Second chute

62‧‧‧Inlay

64‧‧‧Installation holes

66‧‧‧ Connection surface

68‧‧‧Kakong

70‧‧ Ears

72‧‧‧ Spring

74‧‧‧ first joint end

76‧‧‧Second junction

78‧‧‧ linkages

82‧‧‧ first end

84‧‧‧second end

85‧‧‧End wall

86‧‧‧Bound wall

88‧‧‧First joint pin

89‧‧‧Second combination pin

91‧‧‧ third joint pin

90‧‧‧WD parts

92‧‧‧Pushing end

94‧‧‧ linkage

96‧‧‧Border

98‧‧‧Promoting sales

101‧‧‧Restriction box

103‧‧‧ first wall

103A‧‧‧ inside

103B‧‧‧Outside

105‧‧‧ lugs

109‧‧‧Pivot hole

111‧‧‧through slot

113‧‧‧ second wall

115‧‧‧first block

117‧‧‧Second block

119‧‧‧Connecting wall

131‧‧‧ drive latch

132‧‧‧ base

133‧‧‧ first end face

134‧‧‧Bumps

135‧‧‧ Pushing surface

136‧‧‧ end

137‧‧‧second end face

139‧‧‧Locks

151‧‧‧Ontology

152‧‧‧ first end face

153‧‧‧Keyhole

154‧‧‧ second end face

155‧‧‧ card block

156‧‧‧ third end face

157‧‧‧Combination Department

158‧‧‧fourth end face

159‧‧‧Combination hole

171‧‧ ‧ spring

173‧‧‧ first end

175‧‧‧ second end

177‧‧‧Restrictions

179‧‧‧ first end

191‧‧‧ second end

193‧‧‧ side

195‧‧‧Restricted face

197‧‧‧ accommodating space

199‧‧‧ mounting holes

211‧‧‧long slot

213‧‧‧Chimeric blocks

215‧‧‧ Connecting rod

217‧‧‧ first end

219‧‧‧ second end

237‧‧‧ Sockets

239‧‧‧Part 1

251‧‧‧Part II

253‧‧‧Part III

255‧‧‧ socket

257‧‧‧open door

259‧‧‧Active door

271‧‧‧ side

273‧‧‧ end face

275‧‧‧ driven door

276‧‧‧ side

277‧‧‧ top surface

279‧‧‧ bottom

291‧‧‧ end face

293‧‧‧ Space

295‧‧‧ mounting holes

297‧‧‧Combination hole

299‧‧‧ Ground

300‧‧‧ slots

319‧‧‧door lock

331‧‧‧Handle

333‧‧‧Latch

411‧‧‧Latch

413‧‧‧ Ontology

415‧‧‧Locked end

417‧‧‧Binding end

419‧‧‧ first side

431‧‧‧ second side

433‧‧‧ transverse slot

433A‧‧‧ first side

433B‧‧‧ second side

435‧‧‧bond hole

437‧‧‧ pivot hole

439‧‧‧Vertical holes

451‧‧‧ first part

453‧‧‧ second part

455‧‧‧ First and second earpieces

457‧‧‧ blocking end

459‧‧‧Card end

471‧‧‧ inside

473‧‧‧blocking

475‧‧‧Promotion Department

477‧‧‧Outside

479‧‧‧ fitting slot

480‧‧‧limit surface

491‧‧‧ pivot slot

493‧‧‧ shaft

495‧‧‧blocking parts

497‧‧ ‧ top offset

499‧‧‧ push side

511‧‧‧pressure end

513 ‧ ‧ spring

515‧‧‧Combined pin

X‧‧‧first axial direction

Y‧‧‧second axial

Z‧‧‧third axial

Figure 1 is a front elevational view of the two sets of latch assemblies of the present invention mounted on a split door.

Figure 2 is an exploded perspective view of the inventive latch assembly.

Figure 3 is an exploded perspective view of the latch of the present invention.

Figure 4 is a partial perspective view of the top of the driven door mounted on the driven door.

Fig. 5 is a cross-sectional view taken along line 5-5 of Fig. 4.

Fig. 5A is a cross-sectional view taken along line 5A-5A of Fig. 5.

Figure 6 is a cross-sectional view taken along line 6-6 of Figure 5.

Figure 7 is a cross-sectional view taken along line 7-7 of Figure 5.

Fig. 8 is a cross-sectional view showing the action of the latch being displaced from the unlatching position to the upper latching position after the active door is closed in the state of Fig. 5.

Figure 9 is a cross-sectional view taken along line 9-9 of Figure 8.

Fig. 10 is a view showing a state in which the earpieces are located at the blocking position in the event of a fire in the state of Fig. 9.

Figure 11 is a cross-sectional view showing the action after the latch is not aligned with the slot and the active door is closed to displace the drive latch to the abutment position.

All of the following drawings are merely illustrative of the basic teachings of the present invention, and the extension of the number, position, relationship, and size of the components constituting the preferred embodiment will be explained in the drawings. Post-guided changes are implemented in industry skills. In addition, changes in the exact dimensions and size ratios associated with specific strengths, weights, strengths, and similar requirements are also within the skill of the industry after reading and understanding the teachings of this creation.

In the different figures, the same reference numerals are used to designate the same or similar elements; in addition, please refer to the text such as "first", "second", "third", "upper", "lower", "inside", "Outside", "End", "Part", "Segment", "Vertical", "Length", "Side", "Axial", etc. and similar terms are only for the viewer's reference to the construction and use only To help describe this creation.

According to the drawings, the present invention has a latch assembly 10 mounted on a split door 257 having a door frame 31 disposed on a floor 299, the door frame 31 including two straight bars 33, and two A crossbar 35 (shown in Fig. 1) extending between the straight rods 33 has a slot 37 on the floor 299 and is provided with a slot 300 at a position aligned with the slot 37.

The split door 257 further includes an active door 259 pivoted therein on the straight bar 33, and a driven door 275 pivotally mounted on the other straight bar 33 and having a space 293 therein, wherein the active door 259 includes two sides 271 And an end surface 273 between the two side surfaces 271, the driven door 275 includes two side edges 276, a top surface 277 adjacent to the cross bar 35 and having a mounting hole 295, and a ground 299 having a mounting hole 295 The bottom surface 279, and an end surface 291 between the two side edges 276, are formed on the end surface 291 by two coupling holes 297 spaced apart along a first axial direction X (each drawing only shows the coupling hole 297 near the top surface 277).

The driven door 275 is pivotable between a non-closed position and a closed position. When the driven door 275 is in the non-closed position, the driven door 275 is in an open state and the mounting holes 295 are spaced apart from the slots 37, 300. When the driven door 275 is in the closed position, the driven door 275 is in a closed state and each mounting hole 295 is aligned with each of the slots 37, 300.

A door lock 319 is provided in the drive door 259. The door lock 319 is of any desired form including, but not limited to, a commercially available type. The door lock 319 includes a door latch 333 that can be worn out of the end face 273, and a handle 331 that retracts the door latch 333. And the handle 331 is located on one of the side faces 271 of the active door 259.

When the driven door 275 is in the closed position, and the end surface 273 of the driving door 259 is aligned with the end surface 291 of the driven door 275, the end surface 273 of the driving door 259 is spaced apart from the end surface 291 of the driven door 275 by a small gap, resulting in a small gap The latch 333 is fitted in the end surface 291 of the driven door 275. In addition, one mounting hole 295 of the driven door 275 is provided with one a socket 237 (shown in FIG. 4), each socket 237 includes a first portion 239, a second portion 251 vertically connected to one end of the first portion 239, and a vertical portion connected to one end of the second portion 251 A third portion 253, and the third portion 253 is spaced apart from the first portion 239, and each of the sockets 237 further includes two socket holes 255 extending from the first portion 239 to the third portion 253. The first portion 239 of one of the connectors 237 is locked to the top surface 277 of the driven door 275, and the second and third portions 251, 253 extend into the space 293 of the driven door 275 through the mounting hole 295, and the other sleeve The first portion 239 of the member 237 is locked to the bottom surface 279 of the driven door 275, and the second and third portions 251, 253 extend into the space 293 of the driven door 275 through the mounting hole 295.

As shown, the driven door 275 is mounted with a plurality of latch assemblies 10 adjacent the top surface 277 and adjacent the bottom surface 279, each latch assembly 10 including a bracket 20 coupled to the driven door 275 ( As shown in FIG. 2, each bracket 20 includes two side walls 22 and an intermediate wall 38 extending between the two side walls 22, each side wall 22 including a first end 24 and a first portion spaced along the first axial direction X. a second end 26, and a movable slot 32 formed between the first and second ends 24, 26, each side wall 22 further including a first coupling hole 28 formed between the movable slot 32 and the first end 24, and Forming a second coupling hole 30 at the second end 26, a notch 36 is formed on the intermediate wall 38 and adjacent to the second end 26, and the notch 36 is formed along the first wall X. The card slot 42, each side wall 22 includes a second slot 44 formed on the end surface of the second end 26, a hook portion 40 is formed between the intermediate wall 38 and between the two side walls 22, and the hook portion 40 is along the first axial direction X. Located between the active slot 32 and the notch 36.

The intermediate wall 38 of the bracket 20 is provided with a panel 46. The panel 46 includes an opening 48 that is aligned with the recess 36 and is inserted into the end surface 291 of the driven door 275 through the panel 46 and the intermediate wall 38. The intermediate wall 38 of the bracket 20 Fitted into the coupling hole 297 of the driven door 275 (as shown in Figures 4 and 5), each side wall 22 is located in the space 293 of the driven door 275, and the two brackets 20 are fixed on the driven door 275, and The first end 24 of the bracket 20 adjacent the top surface 277 faces the crossbar 35, and the first end 24 of the bracket 20 near the bottom surface 279 faces the ground 299 (as shown in Figure 1).

Each latch assembly 10 further includes two slidably coupled to the bracket 20 A movable member 50 between the side walls 22, the movable member 50 includes two side faces 52 spaced apart along a second axial direction Y perpendicular to the first axial direction X, and a connecting face 66 extending between the two side faces 52, Each side surface 52 includes a first end 54 and a second end 56 spaced along the first axial direction X. Each side 52 further includes a first chute 58 adjacent the second end 56 and adjacent the first end 54. a second chute 60, and the first chute 58 is spaced apart from the connecting surface 66 by a third axial direction Z perpendicular to the first and second axial directions X, Y by a distance smaller than the second chute 60 along the third The axial direction Z is spaced apart from the connecting surface 66. An ear portion 70 is formed on the connecting surface 66 and adjacent to the first end 54. A connecting hole 66 is formed on the connecting surface 66 of the movable member 50. The axial direction X is between the ear portion 70 and the first end 54. Each side surface 52 includes a recess 62 formed in the end surface of the second end 56. The movable member 50 further includes a side surface 52 formed at the first end 54. A mounting hole 64.

The movable member 50 is mounted between the two side walls 22 of the bracket 20, and each of the first sliding slots 58 is aligned with each of the movable slots 32. Each of the second sliding slots 60 is aligned with each of the first coupling holes 28, and the connecting surface 66 faces the intermediate wall 38. The ear 70 is located between the intermediate wall 38 and the connecting surface 66, and the ear 70 is spaced apart from the hook 40 in the first axial direction X; a first coupling pin 88 passes through the two movable slots 32 of the bracket 20 and Two first sliding slots 58 of the movable member 50; a second coupling pin 89 passing through the two first coupling holes 28 of the bracket 20 and the two second sliding slots 60 of the movable member 50, so that the movable member 50 can be along the first axis Displacement between X in the disengaged position and (as shown in Fig. 5) (as shown in Fig. 8), when the movable member 50 is in the disengaged position, the ear 70 is along the first axis X and the hook 40 is spaced apart by a distance smaller than the distance between the ear portion 70 in the first axial direction X and the hook portion 40 when the movable member 50 is in the engaged position, and further, when the movable member 50 is in the first axial direction X in the disengaged position and the engaged position The second chute 60 provides a space for accommodating the second joint pin 89 when displaced therebetween.

The latch assembly 10 further includes a spring 72 including a first coupling end 74 coupled to the ear portion 70 and a second coupling end 76 coupled to the hook portion 40. The spring 72 biases the movable member 50 away from the movable member 50. Location (as shown in Figure 5).

Each latch assembly 10 further includes a linkage 78 pivotally coupled to the movable member 50. The linkage member 78 includes two end walls 85 spaced along the second axial direction Y, and a combination extending between the two end walls 85. The wall 86, each end wall 85 includes a first end 82 and a second end 8 4. The first coupling pin 88 passes through the first end 82 of the linkage 78, causing the linkage 78 to pivot about a pivot axis defined by the first coupling pin 88, and the linkage 78 can be in the first chute 58 and the movable slot 32 is displaced along the length of the first axial direction X with the first coupling pin 88.

Each latch assembly 10 further includes a dial member 90 pivotally disposed in the bracket 20. The dial member 90 includes a push end 92 and an interlocking end 94, and a latching end 92 and the linking end 94. Hub 96. A third coupling pin 91 passes through the second coupling holes 30 of the bracket 20 and the pivot portion 96 of the dial member 90, causing the dial member 90 to pivot about the pivot axis defined by the third coupling pin 91. In addition, the pushing end 92 of the dialing member 90 is located between the two end walls 85 of the linking member 78, and a pushing pin 98 passes through each of the second end 84 and the pushing end 92, thereby causing the linking member 78 and the dialing member 90 to rotate around the pushing pin. The rotational axis defined by 98 is relatively pivoted, and the pivoting of the dial member 90 causes the linkage member 78 to be displaced in the first axial direction X.

Each of the latch assemblies 10 further includes a restriction frame 101 fixed between the two side walls 22 of the bracket 20, and the restriction frame 101 includes a first wall 103 and a second wall 113 spaced along the first axial direction X, And a connecting wall 119 extending between the first and second walls 103, 113, the first wall 103 includes an inner side 103A facing the second wall 113 and an outer side 103B, and a through slot 111 is formed by the first wall 103 The inner side surface 103A extends along the first axial direction X to the outer side surface 103B, and the restriction frame 101 further includes two first blocks formed on the side edges of the first and second walls 103, 113 on opposite sides of the connection wall 119. 115, and two second blocks 117 formed on the second wall 113 and located on the two side ends spaced apart along the second axial direction Y, the two lugs 105 are formed on the first wall 103 and located along the first Each of the lugs 105 has a pivot hole 109 on the two side ends of the two axial Y partitions.

Each of the first blocks 115 of the restriction frame 101 is engaged with the first slot 42 of the bracket 20, and each of the second blocks 117 is engaged with the second slot 44 to form the first and second walls 103, 113 and the gap. The two holes are spaced apart from each other along the first axis X, and the pivot holes 109 are aligned with the second coupling holes 30. The third coupling pin 91 passes through each of the second coupling holes 30 and the pivot holes 109. The pivoting portion 96 of the dial member 90 is fixed between the two side walls 22 of the bracket 20; the pivot portion 96 of the dialing member 90 is located between the two lugs 105, and the connecting end 94 is passed through The slot 111 is located at the first and second walls 103, 113 Between (as shown in FIG. 5), the pushing end 92 is located between the first wall 103 and the movable groove 32 along the first axial direction X.

The latch assembly 10 further includes a drive latch 131 slidably disposed in the notch 36 of the bracket 20. The drive latch 131 has a base 132. The base 132 includes a first first end surface 133 and a second end surface 137. The base 132 includes The drive latch 131 includes a plurality of protrusions 134 formed on the second end surface 137. The protrusions 134 have two pushing surfaces 135 and two pushing surfaces 135. One end connected to the second end surface 137 is located between the two end portions 136, and the two end portions 136 respectively protrude from the second axial direction Y by two pushing surfaces 135, and one end of each pushing surface 135 is connected with the second end surface 137, the base portion The two tail ends spaced apart along the second axial direction Y are respectively protruded from the two pushing faces 135.

The driving latch 131 is located between the first and second walls 103, 113 of the limiting frame 101, and the base 132 is located between the two side walls 22 of the bracket 20, and the width of each end portion 136 spaced along the second axial direction Y is larger than the notch 36. And each of the second end faces 137 abuts against the inner side surface of the intermediate wall 38, the bumps 134 pass through the gap 36 and exit the intermediate wall 38, and the drive latch 131 is perpendicular to the first and second axial directions X, Y, and the third The axial direction Z is displaced between a release position outside the extension bracket 20 (as shown in Fig. 5) and a pressing position (shown in Fig. 8) that is retracted into the bracket 20, and when the drive latch 131 is released In the position, the drive latch 131 is located at the second end surface 137 of the two end portions 136 against the inner side surface of the intermediate wall 38.

The latch assembly 10 further includes a locking member 139 fixed between the two side faces 52 of the movable member 50. The locking member 139 includes a body 151 including a first body spaced along the first axial direction X. The end surface 152 and the second end surface 154 are spaced apart along the third axial direction Z and located between the first and second end surfaces 152, 154, a third end surface 156 and a fourth end surface 158. The body 151 further includes a first end surface 152. The end surface 152 extends along the first axial direction X to a locking hole 153 of the second end surface 154 having an internal thread. The locking member 139 includes a block 155 formed on the third end surface 156 of the body 151, and is formed on the body 151. A joint portion 157 of the fourth end surface 158, the joint portion 157 includes a coupling hole 159 formed on one surface and extending along the second axial direction Y to the other surface. The latch 155 of the latching member 139 is engaged with the latching hole 68 of the movable member 50, and the third end surface 156 abuts against the connecting surface 6 The inner side of the sixth portion, the coupling hole 159 is aligned with the mounting hole 64, causing the lock member 139 to be displaced between the disengaged position and the engaged position along with the movable member 50.

The latch assembly 10 further includes a restraining member 177 mounted in the movable member 50. The restricting member 177 includes two side faces 193 spaced along the second axial direction Y, and spaced apart along the first axial direction X on the two side faces 193 A first end 179 and a second end 191 of the end, the limiting member 177 further includes an arc-shaped limiting surface 195 formed between the two side surfaces 193, and the limiting member 177 further comprises a side surface 193 extending along the second axial direction Y to A long groove 211 of the other side surface 193, an accommodating space 197 is formed on the first end 179 and spaced apart from the long groove 211, and the limiting member 177 further includes a first end 179 formed by a side surface 193 along the second axis. Two mounting holes 199 extending to Y to the other side 193, and a fitting block 213 formed at each side 193 and located at the second end 191.

The first end 179 of the limiting member 177 is coupled with the locking member 139, so that the coupling portion 157 is fitted into the accommodating space 197, and the coupling hole 159 is aligned with the mounting hole 199, and each of the fitting blocks 213 is associated with the movable member 50. The bracket 62 is fitted, and the second joint pin 89 passes through the first joint hole 28, the second chute 60 and the long groove 211 of the restricting member 177, when the restricting member 177 along the movable member 50 along the first axial direction X The long groove 211 provides a space for accommodating the second joint pin 89 when displaced.

The latch assembly 10 includes a coupling pin 515. The coupling pin 515 passes through the mounting holes 64 of the movable member 50, the mounting holes 199 of the limiting member 177, and the coupling holes 159 of the locking member 139, thereby causing the movable member 50 to be locked. The member 139 and the restraining member 177 are coupled by the coupling pin 515 and are displaced together in the first axial direction X between the disengaged position (as shown in Fig. 5) and the engaged position (as shown in Fig. 8).

The latch assembly 10 includes a spring 171 that includes a first end 173 and a second end 175. The spring 171 is mounted between the two side faces 52 of the movable member 50 and is located between the connecting face 66 and the restricting surface 195 of the restricting member 177. The first end 173 of the spring 171 abuts against the second end face 154 of the locking member 139. The second end 175 abuts against the first coupling pin 88, and the spring 171 biases the locking member 139 from the first coupling pin 88 in the first axial direction X.

The latch assembly 10 further includes a connecting rod 215, and the connecting rod 215 A first end 217 having a female thread and a second end 219 are incorporated in the locking hole 153 of the locking member 139, causing the connecting rod 215 to move along with the locking member 139.

The latch assembly 10 further includes a latching head 411 coupled to the second end 219 of the connecting rod 215. The latching head 411 includes a body 413 including a locking end 415 and a joint end spaced along the first axial direction X. 417, the body 413 further includes two first faces 419 spaced along the second axial direction Y, and two second faces 431 spaced along the third axial direction Z. The body 413 further includes a first face 419 along the first The two axial directions Y extend to a transverse groove 433 of the other first face 419. The transverse groove 433 is located between the locking end 415 and the coupling end 417 along the first axial direction X, and the lateral groove 433 includes a space spaced along the first axis X. A first surface 433A and a second surface 433B, a coupling hole 435 and two pivot holes 437 extend from a second surface 431 of the body 413 along the third axial direction Z to the other second surface 431, wherein the coupling hole 435 passes through the first surface 433A of the lateral groove 433, and the coupling hole 435 is located between the two pivot holes 437 along the second axial direction Y. The respective pivot holes 437 are located along the first axial direction X at the first and second faces 433A, 433B. The body 413 further includes a vertical hole 439 extending from the end surface of the joint end 417 along the first axial direction X to the second surface 433B of the lateral groove 433. The vertical hole 439 includes a second surface 433B adjacent to the lateral groove 433. A first portion 451 and a second portion 453 having internal threads. The second portion 453 of the longitudinal bore 439 of the body 413 is threadedly coupled to the second end 219 of the connecting rod 215. The body 413 is displaced along the first axial direction X with the connecting rod 215 between the upper latching position and the unlatching position.

According to the drawings, the latch 411 further includes a blocking member 495 fixed in the coupling hole 435 of the body 413. The blocking member 495 is made of plastic or a metal material having a lower melting point than the body 413 (such as tin alloy). . In addition, each of the pivot holes 437 of the body 413 is fixed with a shaft 493.

According to the drawings, the latch head 411 further includes first and second ear pieces 455 pivotally disposed in the lateral grooves 433 of the body 413. The first and second ear pieces 455 include a blocking end 457 and an engaging end 459. The first and second ear pieces 455 further include an arcuate inner side 471 extending between the blocking and engaging ends 457, 459 and an outer side 477. The first and second ear pieces 455 are further included on the inner side. a fitting groove 479 of the 471, the fitting groove 479 includes a limiting surface 480, and the fitting groove 479 defines the inner side surface 471 The partition is a blocking portion 473 located between the fitting groove 479 and the blocking end 457 along the first axial direction X, and a pushing portion between the fitting groove 479 and the engaging end 459 along the first axial direction X. 475. The first and second ear pieces 455 further include a pivot groove 491 formed on the outer side surface 477. The pivot groove 491 is disposed between the blocking end 457 and the fitting groove 479 along the first axial direction X (as shown in FIG. 5A). ).

The first and second ear pieces 455 are received in the lateral grooves 433 of the body 413, and the pivot grooves 491 of the first and second ear pieces 455 are pivotally connected to the shaft 493, and the first and second ear pieces 455 are coupled to the shaft. The rod 493 pivots between the retracted position (as shown in Figures 5, 5A, 8) and the blocking position (as shown in Figure 10) when the first and second ear pieces 455 are in the collapsed position. When the first and second ear pieces 455 are not protruded from the lateral grooves 433, when the first and second ear pieces 455 are in the blocking position, the engaging ends 459 of the first and second ear pieces 455 protrude from the transverse grooves. The outer side of the 433 is located outside the corresponding first side 419. As shown in FIG. 5A, the blocking member 495 is located between the blocking ends 457 of the first and second ear members 455 along the second axial direction Y, and the blocking portions 473 of the first and second ear members 455 abut against the blocking members. In the outer peripheral surface of 495, in such a state, the first and second ear pieces 455 cannot pivot to the blocking position.

According to the drawings, the latch head 411 also includes a top offset pin 497 slidably disposed in the longitudinal bore 439 of the body 413 along the first axial direction X. The top offset pin 497 includes a push end 499 and a pressing end. 511. The top offset pin 497 is received in the first portion 451 of the vertical hole 439 of the body 413, and the push end 499 of the top offset pin 497 faces the first and second ear pieces 455, and the top offset pin 497 is along the first axial direction X. The displacement between the non-pushing position (such as 5th, 5A, 8, 9) and the pushing position (as shown in Fig. 10), when the top offset pin 497 is in the non-pushing position, the top offset pin 497 is located at the Between the engaging ends 459 of the first and second ear pieces 455.

According to the drawings, the latch 411 also includes a spring 513 further mounted in the longitudinal bore 439, and the spring 513 is located between the abutting end 511 of the top abutting pin 497 and the second end 219 of the connecting rod 215, the spring 513 The top end pin 497 is biased toward the blocking end 457 of the first and second ear pieces 455 along the first axial direction X, causing the pushing end 499 of the top offset pin 497 to abut against the pushing portion 475 of the first and second ear pieces 455. . Referring to FIG. 5A, the blocking member 495 is located at the blocking end of the first and second ear members 455 along the second axial direction Y. Between 457, and at the same time, the pushing end 499 of the top abutting pin 497 is located between the engaging ends 459 of the first and second ear pieces 455 along the second axial direction Y (non-pushing position), thus causing the first and second The ear piece 455 is positioned in the collapsed position and the blocking member 495 prevents the first and second ear pieces 455 from pivoting from the collapsed position to the blocked position.

The following is a description of the operation of the latch assembly 10 mounted on the driven door 275 and adjacent to the top surface 277, and for convenience of explanation, it is assumed that the active door 259 is in an open state and the driven door 275 is in a closed position (eg, 5, the socket 255 of the socket 237 is aligned with the slot 37 of the crossbar 35 of the door frame 31 (the same sleeve hole 255 located on the bottom surface 279 of the driven door 275 is aligned with the slot 300 of the floor 299. In addition, the end surface 273 of the driving door 259 is offset from the end surface 291 of the driven door 275, and the driving latch 131 of each latch assembly 10 is not pressed and is in the release position (as shown in FIG. 5). The movable member 50 of 10 is in the disengaged position, and the latch head 411 is in the unlatching position, in which the first and second ear pieces 455 are located below the third portion 253 of the socket member 237 along the first axial direction X. Therefore, when the active door 259 is closed and the end surface 273 is aligned with the end surface 291 of the driven door 275, the latch 333 of the door lock 319 on the active door 259 is engaged with the driven door 275, and the end surface 273 of the active door 259 presses the locks. The pushing surface 135 of the driving latch 131 of the latch assembly 10 causes the driving latch 131 to be displaced from the releasing position in the third axial direction Z to the pressing position, and the first end surface 133 of the driving latch 131 abuts against the linking end 94 of the dialing member 90. The push end 92 of the dial member 90 is caused to rotate about the pivot axis defined by the third joint pin 91, and the push end 92 pushes the second ends 84 of the link member 78 by the push pin 98, causing the link member 78 to wrap around the push pin. 98 defines a pivot axis that rotates, and the first coupling pin 88 restricts the movable slot 32 from being displaced by the respective first ends 82 of the linkages 78 in the direction of the first axis X away from the hooks 40, such that the first coupling pin The first end 173 of the spring 171 is pressed against the locking member 139, and the locking member 139 is coupled with the movable member 50 by the engaging pin 515, further causing the movable member 50 and the locking member 139. , the spring 171, the coupling pin 515 and the restriction member 177 are displaced from the disengaged position (as shown in FIG. 5) to the engagement position. (As shown in FIG. 8), when the movable member 50 is displaced from the disengaged position to the engaged position, the first engaging end 74 of the spring 72 is pulled by the ear portion 70, and the locking member 139 interlocks the connecting rod 215 and the latching head 411. Displaced from the unlatching position (as shown in Figure 5) to the upper latch position (eg As shown in FIG. 8 , at this time, the locking end 415 of the latch 411 is embedded in the slot 37 of the crossbar 35, so that the driven door 275 cannot be rotated and opened relative to the door frame 31, and the latch 333 of the door lock 319 of the active door 259 Engaging with the driven door 275 causes the active door 259 not to be rotated open relative to the door frame 31, such that the split door 257 closes the opening partitioned by the door frame 31 and is locked, and when the latch head 411 is in the upper latch position, The first and second ear pieces 455 of the latch head 411 are located between the first portion 239 and the third portion 253 of the socket 237 along the first axial direction X.

It should be particularly noted that, in the state of FIG. 1, when the active door 259 is closed, the two sets of latch assemblies 10 are simultaneously pressed, so that the latch head 411 and the door frame 31 of the latch assembly 10 near the top surface 277 are closed. The slot 37 is fitted, and the latch 411 of the latch assembly 10 near the bottom surface 279 is fitted into the slot 300 of the floor 299. When the handle 331 of the operation door lock 319 drives the door latch 333 to retract, the active door 259 can be pivotally opened relative to the door frame 31 such that the end surface 273 of the active door 259 is disengaged from the drive latch 131, and the first joint end 74 of the spring 72 pulls the movable member. When the latching position is displaced from the engaging position to the disengaging position, the driving latch 131 is displaced from the pressing position to the releasing position, and the latching head 411 is displaced from the upper latching position to the unlatching position, causing the locking end 415 to be disengaged from the slot 37 of the crossbar 35. The driven door 275 can be rotated open relative to the door frame 31.

When the latch head 411 is in the upper latch position and a fire occurs, the blocking member 495 is melted due to heat, so that the top abutting pin 497 is biased by the spring 513 from the non-pushing position to the pushing position, and the top abutting pin 497 is simultaneously pressed. The pushing portions 475 of the first and second ear pieces 455 cause the first and second ear pieces 455 to pivot from the folded position to the blocking position. When the top offset pin 497 is in the push-up position, the engaging end 459 of the first and second ear pieces 455 protrudes outside the corresponding first face 419 (as shown in FIG. 10), and the first and second ear pieces 455 are blocked. The portions 473 abut each other, causing the first and second ear pieces 455 to continue to pivot beyond the blocking position, and the pushing end 499 of the top abutting pin 497 is located between the fitting grooves 479 of the first and second ear pieces 455 (eg As shown in FIG. 10, and the limiting surface 480 of the fitting groove 479 of the first and second ear pieces 455 abuts against the outer circumferential surface of the top abutting pin 497, the first and second ear pieces 455 cannot be blocked. The first and second ear pieces 455 are fixed in the blocking position, and the first and second ear pieces 455 are in the blocking position. The first and second ear pieces 455 are located when the first and second ear pieces 455 are in the blocking position. The engaging end 459 is located between the first portion 239 and the third portion 253 of the socket 237, so that the latch 411 is held in the upper latching position to prevent the split door 257 from being easily caught in a fire. Open, can effectively stop the speed of the fire spread.

As shown in FIG. 11, if the driven door 275 is not in the closed position, the socket hole 255 is not aligned with the slot 37. When the driving door 259 is also closed, the driving latch 131 is displaced to the pressing position, and the latch 411 is to be When the position of the unlatching position is displaced to the upper latching position, it is blocked by the crossbar 35, so that the latching head 411 cannot be displaced to the upper latching position, so the movable member 50 is held in the disengaged position, and the latching member 139, the restricting member 177, the spring 171, and the safety The device 801 remains stationary, but the first coupling pin 88 is displaced in a direction away from the hook 40 in the first axial direction X, causing the dial 90 to pivot about a pivot axis defined by the third coupling pin 91, and The linkage 78 pivots about the pivot axis defined by the push pin 98, but does not drive the latch 411 to the upper latch position, thus effectively reducing the chance of damage to the inventive latch assembly 10 during improper operation.

By creating the first and second ear pieces 455, the first and second ear pieces 455 are pivoted to the blocking position when a fire occurs, which can cause the latch head 411 to be unlatched from the upper latch position. Position displacement prevents the door from opening when a fire occurs, further preventing the spread of fire and smoke. In addition, a commercially available similar latch assembly can have the function of preventing the door from opening when a fire occurs, after replacing the cost-created latch 411.

The latch assembly 10 can automatically engage the active door 259 to disengage the latch 231 to the upper latch position when the active door 259 is closed, and the drive latch 131 is pressed against the active door 259 when the latch 231 is not aligned with the slot 37, However, only the interlocking member 90 and the linking member 78 are pivoted to further compress the spring 171 by the first coupling pin 88, but the latching member 231, the movable member 50, the locking member 139, and the restricting member 177 are not moved, which is effective. The protection latch assembly 10 avoids damage caused by misoperation; further, since the latch head 231 has a linkage relationship with the drive latch 131, when the latch head 231 is clamped, the drive latch 131 is interlocked from the pressing position to the release position. However, the drive latch 131 is blocked by the active door 259 and thus cannot be displaced to the release position, so the latch head 231 is also unable to be displaced to the unlatching position, causing the latch 231 of the latch assembly 10 of the present invention to have a tamper-proof function.

The basic teachings of this creation have been explained to those with ordinary skills in the field. In terms of many extensions and changes will be obvious. For example, the latch 411 can be provided with only a single ear piece 455, such that when the ear piece 455 is in the blocking position, the latch head 411 can still be displaced from the upper latching position to the unlatching position. Alternatively, the first and second ear pieces 455 may not include the fitting groove 479, such that the inner side surface 471 of the first and second ear pieces 455 are not distinguished as the blocking portion 473 and the pushing portion 475, but when the first and second portions are When the ear piece 455 is in the blocking position, the top abutting pin 497 is located between the first side surface 471 of the first and second ear pieces 455 along the second axial direction Y, such that the weight of the first and second ear pieces 455 themselves cannot push the top abutment. The pin 497 is moved to the non-pushing position such that the first and second ear pieces 455 are positioned in the blocking position.

In addition, the blocking member 495 is not only disposed between the first and second ear pieces 455 in the direction of the third axial direction Z. For example, the coupling hole 435 may extend from the end surface of the locking end 415 along the first axial direction X to the transverse groove. The first face 433A of the 433, the blocking member 495 penetrates into the coupling hole 435 along the first axial direction X, and the end of the blocking member 495 is located between the blocking ends 457 of the first and second ear pieces 455, so that the same can be The first and second ear pieces 455 are positioned in the collapsed position.

The present invention disclosed in the specification is to be considered as illustrative and not restrictive. The scope of the present invention is defined by the scope of the appended claims, and is not intended to be limited by the scope of the invention.

215‧‧‧ Connecting rod

219‧‧‧ second end

411‧‧‧Latch

413‧‧‧ Ontology

415‧‧‧Locked end

417‧‧‧Binding end

419‧‧‧ first side

431‧‧‧ second side

433‧‧‧ transverse slot

433A‧‧‧ first side

433B‧‧‧ second side

435‧‧‧bond hole

437‧‧‧ pivot hole

439‧‧‧Vertical holes

451‧‧‧ first part

453‧‧‧ second part

455‧‧‧ First and second earpieces

457‧‧‧ blocking end

459‧‧‧Card end

471‧‧‧ inside

473‧‧‧blocking

475‧‧‧Promotion Department

477‧‧‧Outside

479‧‧‧ fitting slot

480‧‧‧limit surface

491‧‧‧ pivot slot

493‧‧‧ shaft

495‧‧‧blocking parts

497‧‧ ‧ top offset

499‧‧‧ push side

511‧‧‧pressure end

513 ‧ ‧ spring

Claims (9)

A latch assembly for a latch assembly includes: a body (413) including a locking end (415) and a coupling end (417) spaced apart along a first axial direction (X), the body ( 413) further comprising a transverse groove (433) extending along a second axial direction (Y) perpendicular to the first axial direction (X), a coupling hole (435) extending from the surface of the body (413) to the transverse groove ( 433), the body (413) further includes a longitudinal hole (439) extending from the end surface of the joint end (417) along the first axial direction (X) to the lateral groove (433), the body (413) being along the first axial direction (X) is displaced between the upper latching position and the unlatching position, and the coupling end (417) of the body (413) is to be used in conjunction with a connecting rod (215) of a latch assembly (10); a blocking member (495) to be melted at a high temperature, the blocking member (495) is coupled with the coupling hole (435) of the body (413); a first ear member (455) is pivoted to the horizontal portion of the body (413) In the slot (433), the first ear piece (455) includes a blocking end (457) and an engaging end (459), and the first ear piece (455) is further included at the blocking and engaging end (457, 459). An inner side (471) extending between the first ear piece (455) is pivotable between the folded position and the blocking position; 497) slidably mounted in the longitudinal bore (439) along the first axial direction (X), the top offset pin (497) being displaceable between the abutting position and the non-pushing position along the first axial direction (X) a spring (513) mounted in the longitudinal bore (439), the spring (513) biasing the top offset pin (497) toward the upper end of the first ear piece (455) along the first axial direction (X); 495) when the inner hole (497) is in the non-pushing position, the first ear piece (455) is in the folded position, and the first ear piece (455) is not protruded from the horizontal groove (433). Outside, when the blocking member (495) is melted at a high temperature, the spring (513) biases the top abutting pin (497), causing the top abutting pin (497) to be displaced from the non-pushing position to the pushing position, and the top offset pin (497) Pressing the inner side surface (471) of the first ear piece (455), thereby pushing the first ear piece (455) to be displaced from the folded position to the blocking position, when the top offset pin (497) is in the pushed position, the first ear piece (455) is in the blocking position, And the engaging end (459) of the first ear piece (455) protrudes outside the lateral groove (433), and the first ear piece (455) is located at the blocking position to prevent the body (413) from being displaced from the upper latch position. The latch position is displaced. The latch assembly of the latch assembly of claim 1, wherein the first ear piece (455) comprises a fitting groove (479) formed on the inner side surface (471), the fitting groove (479) A limiting surface (480) is included, and the fitting groove (479) partitions the inner side surface (471) into a barrier between the fitting groove (479) and the blocking end (457) along the first axial direction (X). a portion (473) and a pushing portion (475) located between the fitting groove (479) and the engaging end (459) along the first axial direction (X), comprising: a second ear piece (455), pivoted In the lateral groove (433) of the body (413), the second ear piece (455) includes a blocking end (457) and an engaging end (459), and the second ear piece (455) is further included in the blocking, engaging An inner side (471) extending between the ends (457, 459), the second ear piece (455) includes a fitting groove (479) formed on the inner side surface (471), the fitting groove (479) including a a limiting surface (480), the fitting groove (479) partitioning the inner side surface (471) into a blocking portion between the fitting groove (479) and the blocking end (457) along the first axial direction (X) ( 473) and a pushing portion (475) located between the fitting groove (479) and the engaging end (459) along the first axial direction (X), the second ear piece (455) being retractable and blocking position Pivot between; when the first and second ear pieces (455) are in the collapsed position and the top offset pin (497) is in the non-pushing position, the top offset pin (497) abuts against the first and second ear pieces Between the pushing portions (475) of (455), the blocking member (495) is located between the blocking portions (473) of the first and second ear members (455), when the first and second ear members (455) are blocked In the position, the blocking portions (473) of the first and second ear pieces (455) abut each other, and the limiting surface (480) of each fitting groove (479) abuts against the top offset pin (497), resulting in the first The first and second ear pieces (455) cannot be pivoted from the blocking position to the collapsed position. The latch assembly of the latch assembly of claim 1, wherein the lateral groove (433) includes a first face (433A) and a second face (433B) spaced along the first axial direction (X). The bonding hole (435) extends through a first face (433A) of the transverse groove (433) along a third axial direction (Z) perpendicular to the first and second axial directions (X, Y), the longitudinal hole (439) Extended to The second side (433B) of the lateral groove (433). The latch assembly of the latch assembly of claim 3, wherein the longitudinal hole (439) further includes a first portion (451) adjacent to the second face (433B) of the transverse groove (433) and has an inner portion a second portion (453) of the thread, the top offset pin (497) is slidably disposed in the first portion (451) of the longitudinal hole (439), and the second portion (453) of the vertical hole (439) is to be Used to screw with the connecting rod (215). A latch assembly having a latch head includes: a bracket (20) including two side walls (22) and an intermediate wall (38) extending between the two side walls (22), each side wall (22) including a side wall (22) a first end (24) and a second end (26) spaced apart by a first axial direction (X), and an active slot (32) formed between the first and second ends (24, 26), Each side wall (22) further includes a first coupling hole (28) formed between the first end (24) and the movable groove (32), and the intermediate wall (38) of the bracket (20) includes a notch (36). And the intermediate wall (38) is to be coupled to an end surface (291) of the driven door (275), and the driven door (275) can be in a closed position of the open state and a closed position of the closed state. Pivoting; a movable member (50) slidably coupled between the two side walls (22) of the bracket (20), the movable member (50) including a second shaft perpendicular to the first axial direction (X) Two sides (52) spaced apart from (Y), and a connecting surface (66) extending between the two sides (52), each side (52) including a first section spaced along the first axis (X) One end (54) and a second end (56), each side (52) further includes a first chute (58) adjacent to the second end (56) to Near the first chute (60) of the first end (54), the first chute (58) of the movable member (50) is aligned with the movable slot (32) of the bracket (20), and the movable member (50) is tied along the edge The first axial direction (X) is displaced between the disengaged position and the engaged position; a first coupling pin (88) passes through the two movable slots (32) of the bracket (20) and the second of the movable member (50) a chute (58); a second joint pin (89) passing through the two first joint holes (28) of the bracket (20) and the second second chute (60) of the movable member (50); and the movable member ( 50) A pivoting linkage (78) comprising an end wall (85), the end wall (85) comprising a first end (82) and a second end (84), the first end of the linkage (78) (82) pivotally connected with the first coupling pin (88), causing the linkage (78) to be first combined The pivot axis defined by the pin (88) pivots; a dial member (90) pivotally disposed in the bracket (20) includes a push end pivotally coupled to the second end (84) of the linkage (78) ( 92) and a linkage end (94), and the linkage end (94) faces the intermediate wall (38) of the bracket (20); a locking member (139) is fixed on the two sides (52) of the movable member (50) Between the lock member (139) includes a body (151), the lock member (139) is displaced along the movable member (50) between the disengaged position and the engaged position; a spring (171) is disposed at Between the first coupling pin (88) of the locking member (139), the spring (171) biasing locking member (139) is kept spaced apart from the first coupling pin (88) by a first axial direction (X): a limit The frame (101) is fixed between the two side walls (22) of the bracket (20), and includes a first wall (103) and a second wall (113) spaced along the first axial direction (X), and a connecting wall (119) extending between the first and second walls (103, 113), the first wall (103) includes a through slot (111), and the linking end (94) of the dial member (90) is threaded through a through slot (111) and located between the first and second walls (103, 113); a drive latch (131) slidably disposed in the bracket (20) notch (36), the drive latch (131) includes One a portion (132), the base portion (132) including a first end surface (133) and a second end surface (separated along a third axial direction (Z) perpendicular to the first and second axial directions (X, Y) 137), the driving latch (131) further includes a bump (134) formed on the second end surface (137), the first end surface (133) of the driving latch (131) is abutted against the dial member (90) The driving end (94), the driving bolt (131) is retracted into the bracket (20) along the third axial direction (Z) in the releasing position of the protrusion (134) outside the bracket (20) and the projection (134). The displacement between the pressing positions, the driving bolt (131) is pivoted from the releasing position to the pressing position displacement system by the pressing dial member (90), causing the linking member (78) to interlock the movable member (50) from the disengaged position to the card. Positional displacement; a connecting rod (215) comprising a first end (217) and a second end (219) coupled to the locking member (139); coupled to the second end of the connecting rod (215) (219 a body (413), the body (413) includes a locking end (415) and a binding end (417) spaced along a first axial direction (X), the body (413) further comprising a first perpendicular One of the axial (X) a transverse groove (433) extending in the second axial direction (Y), a coupling hole (435) extending from the surface of the body (413) to the lateral groove (433), and the body (413) further comprising a bonding end (417) The end surface extends along the first axial direction (X) to a longitudinal hole (439) of the lateral groove (433), and the longitudinal hole (439) of the body (413) is coupled with the second end (219) of the connecting rod (215), the body (413) is displaced between the upper latching position and the unlatching position along the first axial direction (X) together with the connecting rod (215), and is received in the driven door (275) when the body (413) is in the unlatching position. a blocking member (495) that will be melted when heated to a high temperature, the blocking member (495) is coupled to the coupling hole (435) of the body (413); the first ear member (455) is pivotally disposed on the body (413) In the transverse groove (433), the first ear piece (455) includes a blocking end (457) and an engaging end (459), and the first ear piece (455) is further included at the blocking and engaging end (457, 459). An inner side (471) extending between the first ear piece (455) pivotable between the collapsed position and the blocking position; a top offset pin (497) along the first axial direction (X) Slidably mounted in the longitudinal bore (439), the top offset pin (497) is displaceable between the abutment position and the non-pushing position along the first axial direction (X); a spring (513) mounted in the longitudinal bore (439), the spring (513) biasing the top offset pin (497) toward the upper end of the first ear piece (455) along the first axial direction (X); when the blocking member (495) When located in the coupling hole (435), the top abutting pin (497) is in the non-pushing position, the first ear piece (455) is in the folded position, and the first ear piece (455) is not protruded outside the lateral groove (433) When the driving latch (131) is in the release position, the slider (50) is in the disengaged position, and the body (413) is in the unlatching position, and the body (413) is located in the unlatching position to be used with a door frame (31) One of the slots (37) or one of the slots (300) of the ground (299) has no fitting, so that the driven door (275) can pivot between the closed position and the non-closed position. When the driving latch (131) is displaced from the releasing position to the pressing position, the first end surface (133) of the driving latch (131) pushes the linking end (94) of the dial member (90), causing the linkage member (78) The two ends (84) are displaced, so that the first coupling pin (88) passes the first spring (1) 71) The pressing lock member (139) is interlocked with the movable member (50) from the disengaged position to the engaged position, while the body (413) is displaced to the upper latch position, the slider (50) is located at the engaged position and the body (413) is located In the upper latch position, the body (413) is located at the upper latch position to be used with the slot (37) of the door frame (31) or the slot (300) of the floor (299) when the driven door (275) is in the closed position. In either case, the displacement of the drive latch (131) from the release position to the abutment position is to be used to move the dial (90) via the push pin (98) when the driven door (275) is in the non-closed position. Pushing the linkage (78) to move the first coupling pin (88) in the movable slot (32) of the bracket (20) along the first axial direction (X) and compressing the first spring (171), so that the movable member (50) remains In the disengaged position and the body (413) is held in the unlatching position to avoid damage to the latch assembly, the spring (513) biases the top offset pin when the body (413) is in the upper latch position and the blocking member (495) is melted at a high temperature ( 497), causing the top offset pin (497) to be displaced from the non-pushing position to the pushing position, the top offset pin (497) pressing against the inner side surface (471) of the first ear piece (455), thereby pushing the first ear piece ( 455) displaced from the collapsed position to Position, when the top abutting pin (497) is in the pushing position, the first ear piece (455) is in the blocking position, and the engaging end (459) of the first ear piece (455) protrudes outside the lateral groove (433), The placement of an ear piece (455) in the blocking position prevents the body (413) from being displaced from the upper latching position to the unlatching position. A latch assembly having a latch head according to claim 5, wherein the first ear piece (455) comprises a fitting groove (479) formed on the inner side surface (471), the fitting groove (479) Included as a limiting surface (480), the fitting groove (479) partitions the inner side surface (471) into a position between the fitting groove (479) and the blocking end (457) along the first axial direction (X) a blocking portion (473) and a pushing portion (475) between the fitting groove (479) and the engaging end (459) along the first axial direction (X); a second ear piece (455) pivotally In the lateral groove (433) of the body (413), the second ear piece (455) includes a blocking end (457) and an engaging end (459), and the second ear piece (455) is further included in the blocking and engaging end. An inner side surface (471) extending between (457, 459), the second ear piece (455) includes a fitting groove (479) formed on the inner side surface (471), and the fitting groove (479) includes a limit The seating surface (480), the fitting groove (479) partitions the inner side surface (471) to be fitted along the first axial direction (X) a blocking portion (473) between the groove (479) and the blocking end (457) and a pushing portion between the fitting groove (479) and the engaging end (459) along the first axial direction (X) (475 The second ear piece (455) is pivotable between the collapsed position and the blocking position; when the first and second ear pieces (455) are in the collapsed position and the top offset pin (497) is in the non-pushing position When the top offset pin (497) abuts between the pushing portions (475) of the first and second ear pieces (455), the blocking member (495) is located at the blocking portion of the first and second ear pieces (455) ( Between 473), when the first and second ear pieces (455) are in the blocking position, the blocking portions (473) of the first and second ear pieces (455) abut each other, and each of the fitting grooves (479) The stop face (480) abuts against the top offset pin (497), causing the first and second ear pieces (455) to be unable to pivot from the blocking position to the collapsed position. A latch assembly having a latch head according to claim 5, wherein the lateral groove (433) includes a first face (433A) and a second face (separated along the first axial direction (X) 433B), the coupling hole (435) extends through a first axial direction (433A) of the transverse groove (433) along a third axial direction (Z) perpendicular to the first and second axial directions (X, Y), the vertical hole ( 439) extends to the second side (433B) of the lateral groove (433). A latch assembly having a latch head according to claim 5, wherein the vertical hole (439) further comprises a first portion (451) adjoining the second face (433B) of the lateral groove (433) and having a second portion (453) of the internal thread, the top offset pin (497) is slidably disposed in the first portion (451) of the longitudinal hole (439), and the second portion (453) of the vertical hole (439) is connected The second end (219) of the rod (215) is threaded. The latch assembly with a latch head according to claim 5, further comprising a set of street pieces (237), the socket part (237) comprising a first part (239) connected to the first part a second portion (251) at one end of the portion (239), and a third portion connected to one end of the second portion (251) and spaced apart from the first portion (239) along the first axial direction (X) Part (253), the first part (239) of the socket (237) is to be used to be fixed to a top surface (277) of the driven door (275), and the first piece (237) The three parts (253) are to be received in a space (293) of the driven door (275); when the body (413) is in the unlatching position, the first ear piece (455) is along the first axis The (X) is located below the third part (253) of the socket (237), When the body (413) is in the upper latching position, the first ear piece (455) is located in the first portion (239) and the third portion (253) of the socket (237) along the first axial direction (X) Meanwhile, when the body (413) is in the upper latch position and the first ear piece (455) is in the blocking position, the engaging end (459) of the first ear piece (455) abuts against the third part of the socket (237). Part (253) causes the body (413) to be unable to be displaced from the upper latch position to the unlatched position.