CN101397867B - A door lock for a refrigerator - Google Patents

Abstract

The invention relates to a door lock, in particular to a door lock applied to the doors of refrigerators. The components of the door lock are as follows: a lock housing provided with a cylindrical cavity, both terminals of which are provided with round openings; a lock cylinder which is positioned in the cavity of the lock housing; a latch hook which is rigidly connected with one end of the lock cylinder, the other end of which is provided with a keyhole; and a key which is coupled with the keyhole. The lock cylinder consists of an active lock cylinder which can move straightly along the axial direction of the lock housing cavity and rotate, and a passive lock cylinder which can be driven to rotate by the active lock cylinder; a restoring spring is fixed between the active lock cylinder and the passive lock cylinder. A bipolar positioning device, which is used for limiting the rotation position of the active lock cylinder, is fixed in the cavity of the lock housing; the keyhole is positioned on the active lock cylinder; and the latch hook is rigidly connected with the passive lock cylinder. The invention provides the door lock applied to the doors of refrigerators, which is characterized by strong protective function, simple and compact structure, and functions of automatically ejecting the key after locking or unlocking.

Description

A door lock for a refrigerator

technical field

The invention 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 present invention proposes a door lock for refrigerators with a simpler and more compact structure and strong protection performance based on the above-mentioned shortcomings of the prior art.

Contents of the invention

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

Another object of the present invention is to provide a door lock for a refrigerator that enables the key to automatically eject the key after locking and unlocking.

In order to realize above-mentioned purpose of the invention, the present invention 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 two ends of which 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 technical solution, the present invention provides a door lock for refrigerators with strong protection performance, simple and compact structure, and the ability to automatically eject the key 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 invention;

What is shown in Fig. 2 is the sectional schematic diagram of the first state of the embodiment of the present invention;

What is shown in Fig. 3 is the sectional schematic diagram of the second state of the embodiment of the present invention;

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

What is shown in Fig. 5 is the sectional schematic view of the fourth state of the embodiment of the present invention;

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 stop

212 The second block 213 The first positioning groove 214 The second positioning groove 311 The first limiting part

312 Second limiting part 313 Flange 314 Limiting block 315 Keyhole

a, b limit surface

Detailed ways

The invention provides a door lock for refrigerators with strong protection performance and simple and compact structure. The door lock for refrigerators can automatically pop out the key after the process of locking and unlocking. The structure of the door lock is described in detail.

Shown in Fig. 1 and Fig. 2 is the perspective view of the internal structure of the embodiment of the door lock used on the refrigerator and the cross-sectional schematic diagram of the first state of the refrigerator door lock of the present invention, the door lock used on the refrigerator includes The lock case 2 is 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 arranged 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 the refrigerator door lock needs to be opened, that is, when the lock is unlocked, the method adopted is just opposite to the steps described above.

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

The scope of protection of the present invention is not limited to the technical solutions described in the above examples, but as long as the technical solutions include the technical features in the claims of the present invention, they fall within the protection scope of the present invention.

Claims (8)

1. A door lock for a refrigerator, including A lock case, the lock case is a shell with a cylindrical cavity, and two ends of which 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. It is characterized in that the 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 the passive lock core that can be driven and rotated by the active lock core, a return spring is fixedly arranged between the active lock core and the passive lock core, and a bipolar positioning device for limiting the rotational position of the active lock core is also fixedly arranged in the cavity of the lock housing mechanism, the keyhole is set on the active lock cylinder, and the lock hook is rigidly connected with the passive lock cylinder. 2. A kind of door lock that is used on the refrigerator according to claim 1, it is characterized in that, described lock case comprises the lock cover and lock body that are rigidly connected with each other, and the lock cover is provided with a circular opening cap at the center structure, the lock body is a shell with a cylindrical cavity, and the bipolar positioning mechanism is arranged at the periphery of the circular opening inside the lock cover. 3. A door lock for a refrigerator according to claim 2, wherein the bipolar positioning mechanism consists of a first stopper and a second stopper arranged on the periphery of the circular opening inside the lock cover Composition, the first block and the second block are both arc-shaped structures, the center of the arc-shaped structure coincides with the center of the circular opening, and two blocks are formed between the first block and the second block Locating slot. 4. A door lock for a refrigerator according to claim 3, wherein the center angle between the two positioning grooves is 90°, and the first stopper is higher than The second block is to form two blocking surfaces matched with the positioning groove. 5. A door lock for a refrigerator according to claim 2, 3 or 4, wherein the active lock core includes a first limiting portion and a second limiting portion rigidly connected to each other, the second limiting portion The first limiting part is a cylinder corresponding to the circular opening of the lock cover, the second limiting part is a strip-shaped body with a regular polygonal cross-section, and a flange is also arranged on the active lock cylinder, and a flange is arranged on the flange. There are limit blocks that cooperate with the bipolar positioning mechanism. 6. A door lock for a refrigerator according to claim 5, wherein a groove for fixing a return spring is arranged at the center of the second limiting part, and a groove for fixing a return spring is arranged at the center of the bottom surface of the groove. There is a first strut for fixing one end of the return spring. 7. A kind of door lock that is used on the refrigerator according to claim 5, it is characterized in that, described passive lock core is the cylinder corresponding to the cylindrical cavity of lock case, is provided with described on it. The second limiting part is a groove with matching cross-sectional shape, and a second support rod for fixing the other end of the return spring is arranged at the center of the bottom surface of the groove. 8. A door lock for a refrigerator according to claim 1, wherein the keyhole is a concave hole with a polygonal cross-section, and the key includes a key that matches the cross-sectional shape of the concave hole. The boss structure and the easy-to-use key handle rigidly connected with it.

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