Compact double bolt linkage master lock

Abstract

The present invention belongs to the technical field of door locks, and relates to a compact double-bolt linkage master-slave lock, comprising a lock shell fixed inside a door, a panel fixed on one side of the lock shell, a lock core passing through the thickness direction of the lock shell, and two lock tongues passing through the panel, the two lock tongues being an axially hollow outer tongue and an inner tongue passing through the hollow part of the outer tongue, a spring capable of allowing the outer tongue to pop out and return to its original position is arranged inside the lock shell, the inner end of the inner tongue is connected to a safety rod, the middle section of the safety rod has a groove portion, the lock core has a dial wheel capable of cooperating with the groove portion to drive the safety rod to extend and retract, a No. 1 pin limiting the outer tongue pop-out position is arranged on the inner side of the panel, a No. 2 pin limiting the inner tongue retracting position is arranged on the outer tongue, and a spring sheet is also arranged inside the lock shell to resist the rear end of the safety rod after it is extended. The lock has a compact structure and adopts a direct push and pull structure, so that the user can open the door by any contactable method when both hands are not free, thus saving the time of opening the door, reducing the chance of bacterial infection in public places, and changing people's living habits.

Description

Technical Field

[0001] The invention relates to the technical field of door locks, and in particular to a compact double-bolt linked parent-child lock. Background Art

[0002] Door locks are products used on door leaves for opening and closing doors. A door lock generally has two lock tongues, namely the oblique tongue and the square tongue. The oblique tongue is used to open and close the door, and the square tongue is used to lock the door leaf. The square tongue must be matched with the lock core. This structure makes the axis of the lock core and the oblique tongue have a large distance, so the lock body is relatively large and has more parts, resulting in greater damage to the door leaf and door frame, inconvenient installation, and low reliability. Moreover, when opening and closing the door, you must press down or rotate the handle by hand, which wastes time; and for public places, such as schools and hospitals, it is easy to cause cross infection of bacteria and viruses.

[0003] Therefore, it is necessary to improve the lock structure to solve the above problems. Summary of the invention

[0004] The main purpose of the present invention is to provide a compact double-bolt linked master-slave lock, which can save the time of rotating the handle, make the lock body space smaller, and facilitate opening and closing the door.

[0005] The present invention achieves the above-mentioned purpose through the following technical scheme: a compact double-lock tongue linked mother-and-child lock, comprising a lock shell fixed in the door, a panel fixed on one side of the lock shell, a lock core passing through the lock shell in the thickness direction, and two lock tongues passing through the panel, the two lock tongues are an axially hollow outer tongue and an inner tongue passing through the hollow part of the outer tongue, a spring is provided in the lock shell to allow the outer tongue to pop out and return to its position, the inner end of the inner tongue is connected to a safety rod, the middle section of the safety rod has a groove portion, the lock core has a dial wheel that can cooperate with the groove portion to drive the safety rod to extend and retract, a No. 1 pin is inserted on the outer tongue to limit the pop-up position of the outer tongue, a No. 2 pin is provided on the outer tongue to limit the retractable position of the inner tongue, and a spring sheet is also provided in the lock shell to resist the tail end of the extended safety rod.

[0006] Specifically, the lock housing is formed by front and back assembly of a bottom plate and a cover plate and fixed by a plurality of short screws, wherein one of the short screws limits the retraction position of the No. 1 pin.

[0007] Furthermore, a fixing plate is sandwiched between the opposite surfaces of the bottom plate and the cover plate, and a protrusion is provided on each side of the fixing plate to penetrate into the positioning holes on the bottom plate and the cover plate respectively.

[0008] Furthermore, the fixing plate is provided with a threaded hole, and the panel is fixed by a long screw passing through the threaded hole and the lock core.

[0009] Furthermore, the bottom plate and the cover plate are formed with arc-shaped grooves adapted to the shape of the spring, and the inner side of the spring is supported on the platform at the edge of the arc-shaped groove.

[0010] Specifically, a gasket is provided on the panel at the edge of the hole through which the outer tongue passes.

[0011] Compared with the prior art, the compact double-bolt linked parent-child lock of the present invention has the following beneficial effects:

[0012] The lock has a compact structure and complete functions, allowing users to open the door by any accessible method when both hands are free, thus reducing the chance of bacterial infection in public places. Traditional locks require pressing down or rotating the door by hand to open the door, while the lock adopts a direct push and pull structure, thereby saving the time of opening the door. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a partial cross-sectional view of the universal lock of the embodiment in an unactivated state;

[0014] Figure 2 for Figure 1 AA section view in;

[0015] Figure 3 It is a partial cross-sectional view of the universal lock of the embodiment in a state of contact with the buckle plate;

[0016] Figure 4 It is a partial cross-sectional view of the universal lock in the embodiment in a closed state;

[0017] Figure 5 It is a partial cross-sectional view of the universal lock of the embodiment during the locking process;

[0018] Figure 6 It is a partial cross-sectional view of the universal lock of the embodiment when locked.

[0019] The numbers in the figure represent:

[0020] 1-lock housing, 11-bottom plate, 111-arc groove, 112-platform, 12-cover plate, 121-arc groove, 122-platform, 13-fixing plate, 14-short screw;

[0021] 2- gusset plate, 21- lock slot;

[0022] 3-panel, 31-long screw, 32-washer;

[0023] 4-lock cylinder, 41-dial wheel;

[0024] 5-external tongue, 51-spring, 52-pin No. 1, 53-pin No. 2;

[0025] 6-Inner tongue;

[0026] 7-safety bar, 71-groove portion;

[0027] 8-Spring leaf. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below with reference to specific embodiments.

[0029] Example:

[0030] like Figure 1 As shown, a compact double-bolt linkage master-slave lock of the present invention comprises a lock housing 1 fixed in a door, a panel 3 fixed on one side of the lock housing 1, a lock core 4 passing through the thickness direction of the lock housing 1 and two lock tongues passing through the panel 3, the two lock tongues are an axially hollow outer tongue 5 and an inner tongue 6 passing through the hollow part of the outer tongue 5, a spring 51 is provided in the lock housing 1 to allow the outer tongue 5 to pop out and return to its position, the inner end of the inner tongue 6 is connected to a safety rod 7, the middle section of the safety rod 7 has a groove portion 71, the lock core 4 has a dial wheel 41 that can cooperate with the groove portion 71 to drive the safety rod 7 to extend and retract, a No. 1 pin 52 is inserted on the outer tongue 5 to limit the pop-up position of the outer tongue 5, a No. 2 pin 53 is provided on the outer tongue 5 to limit the retractable position of the inner tongue 6, and a spring sheet 8 is also provided in the lock housing 1 to resist the tail end of the extended safety rod 7. A buckle plate 2 cooperating with the two lock tongues is fixed on the door frame. In this structure, the inner tongue 6 and the lock core 4 are driven by a thinner safety rod 7, and the structure does not interfere directly like the main lock types on the market. The distance between the axis of the outer tongue 5 and the axis of the lock core 4 can be significantly reduced, so the lock housing can be significantly reduced in height. In addition, the lock tongue adopts an inner and outer nesting structure, so the structure is compact and the volume is smaller. The installation does little damage to the door, but it has complete functions; and because there are fewer parts, the probability of failure is lower and the reliability of use is high.

[0031] like Figures 3 to 6 As shown, the operating principle of this lock is:

[0032] ① When closing the door, due to the limiting effect of the No. 2 pin 53, the buckle plate 2 can push the outer tongue 5 and the inner tongue 6 to retract at the same time, the spring 51 is compressed, and the safety rod 7 can retreat without the obstruction of the spring sheet 8. When both the lock tongues 5 and 6 enter the lock groove 21 of the buckle plate 2, the spring 51 pushes the outer tongue 5 to return to its original position, and the outer tongue 5 uses the No. 2 pin 53 to push the inner tongue 6 to pop out together, and the door is closed;

[0033] ② When the safety is on, the lock cylinder 4 is operated to rotate the dial 41 counterclockwise. When the dial 41 reaches the upper part, it will be stuck in the groove 71 of the safety rod 7. Continuing to rotate will allow the safety rod 7 to overcome the obstruction of the spring sheet 8 and extend with the inner tongue 6. Finally, the spring sheet 8 can resist the tail of the safety rod 7. The safety rod 7 can keep the inner tongue 6 locked without external force.

[0034] ③ When unlocking, the lock core 4 is operated to rotate the dial 41 clockwise, and the dial 41 then drives the safety lever 7 through the groove portion 71 to overcome the elastic force of the spring sheet 8, and the inner tongue 6 returns to the initial position inside the outer tongue 5.

[0035] Traditional locks require manual pressing or rotation to open the door. This lock adopts a direct push structure, allowing users to open the door by any accessible method when both hands are busy, thereby saving door opening time and reducing the chance of bacterial infection.

[0036] like Figure 1 and Figure 3 As shown, the lock housing 1 is composed of a bottom plate 11 and a cover plate 12 assembled front and back and fixed by a plurality of short screws 14, one of which limits the retracted position of the first pin 52. Such a structure is convenient for installation, and one of the short screws 14 also takes into account the limiting function of the first pin 52.

[0037] like Figure 1 and Figure 2 As shown, a fixing sheet 13 is sandwiched between the opposite surfaces of the bottom plate 11 and the cover plate 12, and a protrusion is provided on each side of the fixing sheet 13 to penetrate into the positioning holes on the bottom plate 11 and the cover plate 12. The fixing sheet 13 has a relative positioning function for the bottom plate 11 and the cover plate 12, so that the positions of the various components of the lock housing 1 are fixed accurately enough after assembly to avoid the problem of jamming during use.

[0038] like Figures 1 to 3 As shown, a threaded hole is provided on the fixing plate 13, and the panel 3 is fixed by a long screw 31 passing through the threaded hole and the lock core 4. In this way, the same fixing plate 13 also limits the position of the panel 3 and the lock core 4, further improving the integrity of the lock.

[0039] like Figure 2 As shown, arc grooves 111, 121 adapted to the shape of the spring 51 are formed on the bottom plate 11 and the cover plate 12, and the inner side of the spring 51 is against the platforms 112, 122 on the sides of the arc grooves 111, 121. The arc grooves 111, 121 are easily obtained by plane stretching, and the accompanying platforms 112, 122 serve as reference surfaces on the inner side of the spring 51. This is conducive to reducing the occupation of the lock housing 1 in the thickness direction, and the processing cost is low.

[0040] like Figure 1 As shown, the panel 3 is provided with a gasket 32 ​​at the edge of the hole through which the outer tongue 5 passes. The gasket 32 ​​can prevent the outer tongue 5 and the panel 3 made of metal from rubbing against each other during the process of opening and closing the door and generating noise.

[0041] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A compact double-bolt linkage master-slave lock, comprising a lock housing fixed in a door, a panel fixed to one side of the lock housing, a lock core passing through the thickness direction of the lock housing, and two bolts passing through the panel, characterized in that: The two lock tongues are an axially hollow outer tongue and an inner tongue passing through the hollow part of the outer tongue. A spring is provided in the lock housing to allow the outer tongue to pop out and return to its position. The inner end of the inner tongue is connected to a safety rod. The middle section of the safety rod has a groove. The lock core has a dial wheel that can cooperate with the groove to drive the safety rod to extend and retract. A No. 1 pin that limits the pop-up position of the outer tongue is inserted on the outer tongue. A No. 2 pin that limits the retractable position of the inner tongue is provided on the outer tongue. A spring sheet that presses against the tail end of the extended safety rod is also provided in the lock housing.

2. The compact double-bolt linked parent-child lock according to claim 1, characterized in that: The lock housing is formed by front and back assembly of a bottom plate and a cover plate and is fixed by a plurality of short screws, one of which limits the retracted position of the first pin.

3. The compact double-bolt linked parent-child lock according to claim 2, characterized in that: A fixing sheet is sandwiched between the opposite surfaces of the bottom plate and the cover plate, and a protrusion is provided on both sides of the fixing sheet to penetrate into the positioning holes on the bottom plate and the cover plate respectively.

4. The compact double-bolt linked parent-child lock according to claim 3, characterized in that: The fixing plate is provided with a threaded hole, and the panel is fixed by a long screw passing through the threaded hole and the lock core.

5. The compact double-bolt linked parent-child lock according to claim 2, characterized in that: The bottom plate and the cover plate are formed with arc-shaped grooves adapted to the shape of the spring, and the inner side of the spring is supported on the platform at the edge of the arc-shaped groove.

6. The compact double-bolt linked parent-child lock according to claim 1, characterized in that: The panel is provided with a gasket at the edge of the hole through which the outer tongue passes.

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