CN201110062Y - A door lock for a refrigerator - Google Patents

Abstract

The utility model relates to a door lock, in particular to a door lock applied to a refrigerator door body, which comprises a lock shell, which is a shell with a cylindrical cavity, and two ends of which are provided with round opening; a lock core, which is arranged in the cavity of the lock housing; a lock hook, which is rigidly connected to one end of the lock core; the other end of the lock core is also provided with a keyhole, and the door lock also includes a keyhole Cooperating keys, the lock core includes an active lock core that can move linearly and rotate along the axial direction of the lock housing cavity, and a passive lock core that can be driven to rotate by the active lock core, and the active lock core and the passive lock core are fixed A return spring is provided, and a bipolar positioning mechanism for limiting the rotational position of the active lock cylinder is fixedly installed in the cavity of the lock housing. The keyhole is arranged on the active lock cylinder, and the lock hook is rigidly connected with the passive lock cylinder. In this way, the utility model provides a door lock for a refrigerator with strong protection performance, simple and compact structure, and the key can be ejected automatically after locking and unlocking.

Description

A door lock for a refrigerator

technical field

The utility model relates to a door lock, in particular to a door lock applied to a refrigerator door body

Background technique

Freezers are large-scale household refrigeration equipment and are widely used in every corner of society. However, because of the low height of the refrigerator, it is easy for children to climb into the refrigerator and cause injury. Therefore, the door of the general refrigerator is equipped with a door to prevent the above situation lock, wherein the disclosure date is August 8, 2001, the application number is 00110868.9, and the Chinese patent named as refrigerator door lock discloses a refrigerator door lock, comprising a lock body, a lock core, a lock hook and a spring, and the lock core on the lock core The keyhole is a through hole with a polygonal cross section. The rear section of the lock core penetrates into the axial circular through hole of the boss behind the lock body. The boss is covered with a hollow cover, and there is a "rivet" shaped key ejector nail inside the hollow cover There is a compression spring between the end surface of the nail cap and the inner bottom surface of the hollow cover. The nail head section is a polygonal column with the same cross-sectional shape as that of the keyhole, and penetrates into the keyhole, and the end is basically flush with the front end of the keyhole. The front section of the lock core exposes the front end of the lock body, and a lock hook is installed on the front end surface of the lock body; and the public date is April 3, 2002. The patent number is ZL01243718.2, and the Chinese utility model patent named freezer lock discloses a door lock for freezers. , this kind of door lock is made up of pin, retaining ring, shift plate, lock core, lock body, compression spring, stop lock plate and key, and at least two limit slots are arranged on the inner wall of the lock body, two limit slots The groove communicates with the circumferential groove on the inner wall. The lock core is composed of a front lock core and a rear lock core. The pressure spring and the lock plate are located in the cavity of the lock core. The lock plate is composed of two intersecting parts, and its axial part It is in contact with the lock cylinder and the compression spring, and the transverse part is in contact with the limiting groove on the inner wall of the lock.

However, in the technical solutions of the prior art represented by the above patent documents, too many connecting components are required, the connection and installation between them are complicated, and the service life is easily affected. The utility model proposes a door lock for a refrigerator with a simpler and more compact structure and strong protection performance based on the above-mentioned shortcomings of the prior art.

Utility model content

An object of the invention of the utility model is to provide a door lock for a refrigerator with strong protection performance and a simple and compact structure.

Another object of the invention of the present utility model is to provide a door lock for a refrigerator that can automatically eject the key after the key is locked and unlocked.

In order to realize above-mentioned purpose of the invention, the utility model adopts following technical scheme:

A door lock for a freezer, comprising

A lock case, the lock case is a shell with a cylindrical cavity, and its two ends are provided with circular openings:

a lock cylinder, the lock cylinder is arranged in the cavity of the lock housing;

a locking hook, the locking hook is rigidly connected to one end of the lock cylinder;

The other end of the lock cylinder is also provided with a keyhole, and the door lock also includes a key matched with the lockhole. The above-mentioned lock cylinder includes an active lock cylinder that can move linearly and rotate along the axial direction of the cavity of the lock housing, and can be driven by the active lock. The core drives the rotating passive lock core, and a return spring is fixedly arranged between the active lock core and the passive lock core, and a bipolar positioning mechanism for limiting the rotation position of the above-mentioned active lock core is also fixedly installed in the cavity of the lock housing, and the keyhole is arranged on the On the active lock cylinder, the lock hook is rigidly connected with the passive lock cylinder.

The above-mentioned lock case includes a lock cover and a lock body which are rigidly connected to each other. The lock cover is a cap structure with a circular opening in the center, and the lock body is a shell with a cylindrical cavity. The above-mentioned bipolar positioning mechanism is arranged on the lock body. At the periphery of the circular opening on the inside of the cover.

The above-mentioned bipolar positioning mechanism is composed of a first stopper and a second stopper arranged on the periphery of the circular opening inside the lock cover. The first stopper and the second stopper are both arc-shaped structures. The center of the circle coincides with the center of the above-mentioned circular opening, and two positioning grooves are formed between the first stopper and the second stopper.

The central angle between the above two positioning grooves is 90°, and the above-mentioned first stopper is higher than the second stopper to form two blocking surfaces that cooperate with the above-mentioned positioning grooves.

The above-mentioned active lock core includes a first limiting part and a second limiting part rigidly connected to each other, the first limiting part is a cylinder corresponding to the circular opening of the lock cover, and the second limiting part is a regular polygon in section In addition, the active lock cylinder is provided with a flange, and the flange is provided with a limit block that cooperates with the bipolar positioning mechanism.

A groove for fixing the return spring is provided at the center of the above-mentioned second limiting portion, and a first support rod for fixing one end of the return spring is also provided at the center of the bottom surface of the groove.

The above-mentioned passive lock core is a cylinder corresponding to the cylindrical cavity of the lock housing, on which is provided a groove matching the cross-sectional shape of the above-mentioned second limiting part, and the center of the bottom surface of the groove is provided with another spring for fixing the return spring. A second strut at one end.

The above-mentioned keyhole is a concave hole with a polygonal cross-section, and the above-mentioned key includes a boss structure matching the cross-sectional shape of the concave hole and a convenient key handle rigidly connected with it.

By adopting the above-mentioned technical solution, the utility model provides a door lock for a refrigerator with strong protection performance, simple and compact structure, and the key can be ejected automatically after locking and unlocking.

Description of drawings

Shown in Fig. 1 is the perspective view of the internal structure of the embodiment of the present utility model;

Shown in Fig. 2 is the sectional schematic diagram of the first state of the embodiment of the present utility model;

Shown in Fig. 3 is the sectional schematic diagram of the second state of the embodiment of the present utility model;

Shown in Fig. 4 is the sectional schematic view of the third state of the embodiment of the present utility model;

Shown in Fig. 5 is the sectional schematic view of the fourth state of the embodiment of the present utility model;

Each label in the accompanying drawings represents the name of the component as follows:

1 key 2 lock shell 3 lock cylinder 4 return spring

5 lock hook 11 key handle 12 boss structure 21 lock cover

22 lock body 31 active lock cylinder 32 passive lock cylinder 211 first block

212 Second block 213 First positioning groove 214 Second positioning groove 311 First limit part

312 Second limit part 313 Flange 314 Limit block 315 Keyhole

a, b limit surface

Detailed ways

The utility model provides a door lock for a refrigerator with strong protection performance and a simple and compact structure. The door lock for the refrigerator can automatically eject the key after the process of locking and unlocking. The structure of the door lock on the freezer is described in detail.

Shown in Fig. 1 and Fig. 2 is the three-dimensional view of the internal structure of the embodiment of the door lock used on the refrigerator of the present invention and the sectional schematic diagram of the first state of the door lock of the refrigerator, the door lock used on the refrigerator It includes a lock case 2 composed of a lock cover 21 and a lock body 22. The lock case 2 is a shell with a cap and a cylindrical cavity, and circular openings are provided at both ends of the shell.

A lock core 3 is fitted in the lock case 2 , and the two ends of the assembled lock core 3 are equal to the two ends of the above-mentioned lock case 2 . The lock core 3 includes an active lock core 31 and a passive lock core 32. The active lock core 31 can move linearly along the axial direction of the inner cavity of the lock housing 2, and can also rotate in the inner cavity of the lock housing 2. The passive lock core 32 can move in a straight line in the inner cavity of the lock housing 2. Driven by the active lock core 31, it rotates in the cavity of the lock housing 2, but the passive lock core 32 cannot move linearly in the axial direction. In addition, a return spring 4 is fixedly arranged between the active lock cylinder 31 and the passive lock cylinder 32, and a bipolar positioning mechanism for limiting the rotation position of the above-mentioned active lock cylinder 31 is also fixedly arranged in the inner cavity of the lock housing 2, and the keyhole 315 is arranged on On the active lock core 31 , the lock hook 5 is rigidly connected with the passive lock core 32 .

The above-mentioned components are described in detail below, wherein the lock cover 21 is a cap structure with a circular opening in the center, the lock body 22 is a shell with a cylindrical cavity, and the above-mentioned bipolar positioning mechanism is arranged on the lock cover 21 At the periphery of the inner circular opening. The lock cover 21 is provided with a circumferential draw-in slot, and one end of the lock body 22 is provided with an outer flange corresponding to the circumferential draw-in slot, and by fixing the outer flange in the draw-in slot, the lock cover 21 and the lock body 22 It can be fixedly connected together. In addition, the above-mentioned bipolar positioning mechanism is composed of a first stopper 211 and a second stopper 212 arranged on the periphery of the inner circular opening of the lock cover 21. The first stopper 211 and the second stopper 212 are Arc-shaped structure, their center of circle coincides with the center of circle of the circular opening, and a first positioning groove 213 and a second positioning groove 214 are formed between the first stopper 211 and the second stopper 212, these two positioning grooves The central angle between them is 90°, and the two positioning grooves are used to cooperate with the limit block 314 on the active lock core 31 to limit the rotating position of the active lock core 31, and set the distance between the two positioning grooves. The angle of the clip is 90° in order to make the process of locking and unlocking with the key 1 feel obvious and easy to use. In addition, the height of the above-mentioned first block 211 is greater than the height of the second block 212 to form two protruding blocking surfaces a, b so that the limiting block 314 of the active lock cylinder 31 can be positioned with the restriction of the blocking surfaces a, b. The grooves are precisely corresponding to each other, and the positioning of such a bipolar positioning mechanism is more accurate.

The lock core 3 includes an active lock core 31 and a passive lock core 32 . The active lock cylinder 31 includes a first limiting portion 311 and a second limiting portion 312 that are rigidly connected to each other. The first stopper 311 is a cylinder corresponding to the circular opening of the lock cover 21. After assembly, the end of the cylinder is flat with the surface of the end of the lock cover 21. The second stopper 312 is a bar with a regular polygonal cross section. shape. In addition, an annular flange 313 is disposed at the junction of the first limiting portion 311 and the second limiting portion 312 , and the radial length of the flange 313 is greater than the radial length of the circular opening of the lock cover 21 . A limiting block 314 is also arranged on the flange 313, and the size of the limiting block 314 corresponds to the size of the above-mentioned two positioning grooves. The positions of the two positioning slots correspond. A groove for fixing the return spring 4 is provided on the second limiting portion 312 , and a first support rod is provided at the bottom of the groove, and the first support rod is also used for fixing one end of the return spring 4 . In addition, the active lock cylinder 31 is also provided with a keyhole 315, the keyhole 315 is a polygonal groove in section, and the front end of the key 1 is a boss structure 12 corresponding to the section of the keyhole 315, and the boss structure 12 is also rigid. A key handle 11 that is easy for the user to operate is connected, and the passive lock core 32 is a cylinder corresponding to the cylindrical cavity of the lock case 2, and a groove matching the cross-sectional shape of the second limiting part 312 is provided on it. , the center of the bottom surface of the groove is provided with a second pole for fixing the other end of the return spring 4, wherein the above-mentioned first pole corresponds to the position of the second pole, and the other end of the passive lock core 32 is rigidly connected with the lock hook 5 .

When using the above-mentioned components for assembly, it must be ensured that the first limiting part 31 never breaks away from the circular through hole of the lock cover 21 during the movement of the active lock cylinder 31, while the second limiting part 32 never breaks away from the passive lock cylinder 32. Corresponding to the groove of the second limiting portion 32 .

Fig. 2-Fig. 5 are schematic diagrams of various states in the opening and closing stages of the refrigerator door lock. The state shown in FIG. 2 is that the boss structure 12 of the key 1 is inserted into the keyhole 315 on the active lock cylinder 31; in FIG. The cavity moves in a straight line in the axial direction, and at the same time, its limiting block breaks away from the first positioning groove 213, and the return spring 4 produces elastic deformation; in Fig. 314 is limited by the blocking surface b, so that it corresponds to the position of the second positioning groove 214. At the same time, the passive lock core 32 is driven by the active lock core 31 to rotate 90°, and the lock hook 5 rigidly connected with the passive lock core 32 is snapped into the refrigerator. The corresponding position on the key (not shown in the figure); in Figure 5, the axial pressure applied to the key 1 is cancelled, the key 1 will pop up automatically, and the active lock cylinder will return to the initial position in the axial direction under the restoring force of the return spring 4. position, and the corresponding limiting block 314 snaps into the second positioning groove 214 so that the active lock core 31, the passive lock core 32 and the lock hook 5 on it are fixed, so that even if the refrigerator door lock is closed, it is locked. . When it is necessary to open the refrigerator door lock, that is, to unlock, the method adopted is just opposite to the above-mentioned steps.

Therefore, by adopting the above-mentioned technical solution, the utility model provides a refrigerator door lock with strong protection performance, simple and compact structure, and capable of automatically ejecting the key.

However, the protection scope of the utility model is not limited to the technical solutions described in the above-mentioned embodiments, but as long as the technical solutions comprising the technical features in the claims of the utility model are included, they fall under the protection of the utility model. within range.

Claims (8)

1, a kind of door lock that is used on the refrigerator comprises

One lock housing, this lock housing are one to have the housing of column type cavity, and its two ends are provided with circular open:

One lock core, this lock core are arranged in the lock housing cavity;

One latch hook, this latch hook and lock core one end are rigidly connected;

The other end of lock core also is provided with keyhole, this door lock also comprises the key that cooperates with keyhole, it is characterized in that, described lock core comprises can be along lock housing cavity axial linear movement and the active lock core that rotates, and can by this initiatively lock core drive rotate by movable lock core, lock core and be set with back-moving spring between the movable lock core initiatively, also fixedly install in the lock housing cavity and be useful on the bipolar detent mechanism that limits described active lock core turned position, keyhole is arranged on initiatively on the lock core, latch hook be rigidly connected by movable lock core.

2, a kind of door lock that is used on the refrigerator according to claim 1, it is characterized in that, described lock housing comprises mutual rigidly connected locking closure and lock body, locking closure is that a center is provided with the circular open capping structure, lock body is one to have the housing of column type cavity, and described bipolar detent mechanism is arranged on the peripheral region of locking closure inner circular opening.

3, a kind of door lock that is used on the refrigerator according to claim 2, it is characterized in that, described bipolar detent mechanism is made up of first block and second block that are arranged on locking closure inner circular opening periphery, this first block and second block are the circular arc type structure, the center of circle of circular arc type structure overlaps with the center of circle of described circular open, forms two locating slots between this first block and second block.

4, a kind of door lock that is used on the refrigerator according to claim 3 is characterized in that, folded center angle is 90 ° between described two locating slots, and described first block is higher than second block to form two blocking surfaces that cooperate with described locating slot.

5, according to claim 2,3 or 4 described a kind of door locks that are used on the refrigerator, it is characterized in that, described active lock core comprises be rigidly connected mutually first limiting section and second limiting section, first limiting section is the cylinder corresponding with the circular open of locking closure, second limiting section is that the cross section is the strip shape body of regular polygon, also be provided with flange in addition on this active lock core, this flange is provided with the limited block that cooperates with bipolar detent mechanism.

6, a kind of door lock that is used on the refrigerator according to claim 5 is characterized in that, the described second limiting section center is provided with the groove that is used for fixing back-moving spring, and the groove floor center also is provided with first pole that is used for fixing back-moving spring one end.

7, a kind of door lock that is used on the refrigerator according to claim 5, it is characterized in that, described is the cylinder corresponding with the column type cavity of lock housing by movable lock core, it is provided with the groove that cooperates with the described second limiting section cross sectional shape, and the groove floor center is provided with second pole that is used for fixing the back-moving spring other end.

8, a kind of door lock that is used on the refrigerator according to claim 1, it is characterized in that, described keyhole is that a cross section is polygonal shrinkage pool, and described key comprises boss structure and the convenient the shank of the key that use rigidly connected with it that cooperates with the cross sectional shape of this shrinkage pool.

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