TWI526598B - Door lock protection device - Google Patents

Description

Door lock protection device

The invention relates to a door lock protection device, in particular to a door lock protection device which can be easily manufactured and reduced in manufacturing cost and time.

The existing lock is disposed in a lock, and the lock is disposed on a door panel to lock the door panel to prevent a stranger from entering the room to provide a protection and protection function, wherein when the lock is fixed on the door panel, The key end of the lock core protrudes from one side of the door panel, and the existing door lock protection device is fixed on the side of the door panel and sleeved on the key end of the lock core to prevent the stranger from damaging the lock core.

As shown in FIG. 7 and FIG. 8 , the existing door lock protection device 60 for the lock center is provided with a fixing member 61 and a protective cover 62 . The fixing member 61 is fixed on one side of the door panel and has a top end. a bottom end, an inner side surface, an outer side surface, two opposite side walls 611, a plurality of latching blocks 612, a mounting hole 613 and two bolt holes 614, the inner side surface of the fixing member 61 abutting the side surface of the door panel The two opposite side walls 611 are respectively disposed in parallel with each other between the top end and the bottom end of the fixing member 61. The locking blocks 612 are formed to be spaced apart from each other on the opposite side walls 611 of the fixing member 61. The block 612 is a wedge-shaped structure and is provided with an inner side surface, an outer side surface and a sloped surface 615. The sloped surface 615 is disposed between the inner side surface and the outer side surface of the locking block 612 and is disposed at an oblique angle between the two side surfaces. The mounting hole 613 is disposed between the top end and the bottom end of the fixing member 61. The mounting hole 613 is sleeved on the key end of the lock core, and the two bolt holes are formed. 614 respectively penetrating the inner side surface and the outer side surface of the fixing member 61 and interposed between the top end and the bottom end of the fixing member Between the holes 613, the fixing member 61 can be fixedly coupled to the door panel by two bolts respectively disposed in the two bolt holes 614.

The protective cover 62 is detachably coupled to the fixing member 61, and is sleeved on the fixing member 61 and a key end of a lock core. The protective cover 62 is provided with a top end, a bottom end, an inner side surface and an outer side. a side surface, an opening end edge 621, a receiving groove 622, a plurality of engaging protrusions 623, a plurality of channels 624 and an insertion hole 625, the inner side of the protective cover 62 abutting the side of the door panel, the opening The rim 621 is disposed on the inner side of the protective cover and has a peripheral edge. The accommodating groove 622 is disposed in the protective cover 62 and is disposed between the inner side surface and the outer side surface of the protective cover. The outer side of the fixing member 61 is communicated with the opening end edge 621, and the engaging protrusions 623 are formed to protrude inwardly on the periphery of the opening end edge 621 of the protective cover 62, and can be combined with the card of the fixing member 61. The block 612 is slidably coupled, wherein each of the engaging protrusions 623 is provided with a slanting engaging surface 626. When the protective cover 62 is combined with the fixing member 61, the slanting engaging surface 626 of each engaging protrusion 623 is The card cover 612 is coupled with the inclined surface 615 of one of the latching blocks 612, so that the protective cover 62 can be firmly combined with the fixing member 61. The 624 extends through the inner side of the protective cover 62 and is disposed between the two adjacent latching protrusions 623 and communicates with the receiving slot 622. The insertion hole 625 extends through the outer side surface of the protective cover 62 and the receiving slot. The 622 communicates with each other and is linearly opposed to the mounting hole 613 of the fixing member 61.

In use, when the fixing member 61 abuts against the side of the door panel and the mounting hole 613 is aligned with the mounting hole on the side of the door panel, the two bolts are respectively inserted into the two bolt holes 614 and are fixed to the door panel. The fixing member 61 is slidably disposed on the side of the door panel, and the protective cover 62 is sleeved on the fixing member 61 via the opening end edge 621 and each channel 624, and the fixing member 61 is disposed. The protective cover 62 is disposed in the receiving slot 622, and the protective cover 62 is moved relative to the fixing member 61 so that the inclined engaging surface 626 of each of the engaging protrusions 623 and the inclined surface 615 of the one of the fixing blocks 61 can be 615. The combination of the phase and the locking surface 626 is prevented from being separated from the fixing member 61 by the slanting engagement surface 626. The locking core is disposed on the door panel and the locking core is disposed on the door panel. The key end protrudes from the side of the door panel and passes through the mounting hole 613 of the fixing member 61 and the insertion hole 625 of the protective cover 62.

As described above, the existing door lock protection device 60 can prevent the stranger from damaging the lock core; however, the existing door lock protection device 60 has the following defects and deficiencies, and in the manufacture, the door lock protection device 60 must be in the fixed member. 61 and the protective cover 62 respectively process a plurality of latching blocks 612 having inclined faces 615 and a plurality of engaging bumps 623 having inclined engaging faces 626, and the manufacturing method relatively increases the cost required for production and Time, further, high processing precision is required in manufacturing to produce a clamping relationship between each inclined surface 615 and the corresponding inclined engaging surface 626 as shown in FIG. 9, and this high-precision processing method also increases the manufacturing facility. Cost and time required.

Therefore, the present invention has been developed in view of the lack of existing door lock protection devices in actual manufacturing, and has been continuously tested and researched, and finally developed a present invention which can improve the existing defects. The door lock protection device of the present invention does not need to be The bevel and the inclined engaging surface are respectively processed on the fixing member and the protective cover, which can greatly reduce the cost and time required for manufacturing, thereby providing a door lock protection device which can be easily manufactured and reduced in manufacturing cost and time.

Based on the above object, the technical means utilized by the present invention is to provide a door lock protection device comprising:

a fixing member, the fixing member is provided with a top end, a bottom end, an inner side surface, an outer side surface, two opposite side surfaces, a thickness, at least two limiting members, a mounting hole, a plurality of channels and at least two protrusions The at least two limiting members are formed on the opposite side sides of the fixing member, and each of the limiting members is provided with an inner side surface, an outer side surface, a side surface and a thickness, and the inner side surface of each limiting member is a plane The side surfaces of each of the limiting members are respectively disposed at right angles to the inner side surface and the outer side surface thereof, and the thickness of each of the limiting members is the same as the thickness of the fixing member, and the mounting hole penetrates through the outer side surface and the inner side surface of the fixing member. Between the top end and the bottom end of the fixing member and the at least two limiting members, each of the channels is disposed on one side of the at least two limiting members through the fixing member, and the at least two protruding portions are convexly formed on the fixing member The inner side surface, and each of the protruding seats is provided with an abutting side and a height;

a protective cover, the protective cover is detachably coupled to the fixing member, and is sleeved outside the fixing member, the protective cover is provided with a top end, a bottom end, an inner side surface, an outer side surface, an open end edge, a receiving slot, at least two limiting arms and an insertion hole, the opening end edge extends through the inner side of the protective cover and has a peripheral edge, and the receiving groove is disposed in the protective cover and is disposed inside the protective cover Between the side surface and the outer side surface, the receiving groove cover is disposed outside the fixing member and communicates with the opening end edge and is provided with a bottom surface, and the at least two limiting arms are convexly formed on the periphery of the opening end edge and a passage through the fixing member, when the protective cover is combined with the fixing member, the at least two limiting arms can be pressed against the at least two limiting members of the fixing member, and each limiting arm is provided with a thickness a side surface, an outer side surface and an inner side surface, the inner side surface is a flat surface and can be in abutment with the inner side surface of one of the limiting members, and the side surfaces of each limiting arm are respectively disposed at right angles to the outer side surface and the inner side surface thereof The protective cover is between the inner side of each limiting arm and the bottom surface of the receiving groove There is a spacing of the insertion hole through an outer side surface of the protective cap and is provided in communication with the receiving groove, opposite to the mounting holes and fixing the linear member; and

The height of each of the protruding seats is greater than or equal to the thickness of each of the limiting arms, so that the abutting side of each protruding seat can extend beyond the at least two limiting arms of the protective cover via the open end edge, and is located at each limit The spacing between the inner side surface of the arm and the bottom surface of the receiving groove is greater than or equal to the thickness of the fixing member, so that the fixing member is not disposed to interfere with the at least two limiting arms when disposed in the receiving groove.

Further, the foregoing protective cover is provided with at least two pressing blocks, each pressing block has elasticity and when the protective cover is combined with the fixing member, each pressing block abuts against the outer side surface of the fixing member.

Further, the protective cover is provided with two coupling grooves and two pressing blocks, wherein the coupling grooves are recessed in the bottom surface of the receiving groove and communicate with the receiving groove, and each pressing block is disposed in one of the coupling grooves. And abut against the outer side of the fixing member.

Preferably, one of the coupling grooves is disposed in the protective cover between the insertion hole and the top end of the protective cover, and the other of the coupling grooves is disposed in the protective cover. The insertion hole and the bottom end of the protective cover.

Preferably, the fixing member is provided with a limiting slot, the limiting slot extends through the fixing member, the limiting slot is disposed near the bottom end of the fixing member, and the protective cover is provided with a limit The position bar is outwardly convexly formed on the bottom surface of the receiving groove, and can be combined with the limiting groove of the fixing member to provide a positioning effect of the protective cover relative to the fixing member.

Preferably, the fixing member is provided with two protruding seats and two bolt holes, wherein each protruding seat is hollow, and the two bolt holes penetrate through the inner side surface and the outer side surface of the fixing member and are respectively protruded from the two The straight lines are opposite and connected.

Preferably, the fixing member is provided with four channels, wherein two channels are disposed between the at least two limiting members and the bottom end of the fixing member, and the other two channels are disposed on the at least two limiting members. Between the tops of the fixtures.

Preferably, the protective cover is provided with four limiting arms protrudingly formed on the periphery of the opening end edge, and when the door lock protection device is assembled, each limiting arm is respectively passed through the fixing member Channel.

According to the above technical means, the door lock protection device of the present invention does not need to separately process the inclined surface and the inclined engagement surface on the fixing member and the protective cover when manufacturing the fixing member and the protective cover, such that In addition, the cost and time required for manufacturing can be greatly reduced, and the processing precision required to manufacture the two limiting members against the at least two limiting arms is greater than the processing of manufacturing the inclined surfaces and the inclined engaging inclined surfaces. The accuracy requirements are low, and therefore, the cost and time required for manufacturing can be reduced, thereby providing a door lock protection device that can be easily manufactured and reduced in manufacturing cost and time.

The technical means adopted by the present invention for achieving the intended purpose of the invention are further described below in conjunction with the drawings and preferred embodiments of the invention.

As shown in FIG. 1 to FIG. 3 and FIG. 5, the door lock protection device 10 of the present invention includes a fixing member 20 and a protective cover 30, wherein:

As shown in FIG. 3 and FIG. 5 , the fixing member 20 is fixed on a side surface of a door panel 50 and is provided with a top end, a bottom end, an inner side surface, an outer side surface, two opposite side surfaces, and a thickness X. Two limiting members 21, a mounting hole 22, a plurality of channels 23, a limiting slot 24, two bolt holes 25 and two protruding seats 26, wherein the inner side surface of the fixing member 20 is attached to the side surface of the door panel 50 The two limiting members 21 are respectively formed on the opposite side sides of the fixing member 20, and each of the limiting members 21 is provided with an inner side surface, an outer side surface, a side surface and a thickness, and the inner side surfaces of the two limiting members 21 The inner side surfaces of the two limiting members 21 are respectively facing a flat surface, and the side surfaces of the limiting members 21 are respectively disposed at right angles to the inner side surface and the outer side surface thereof, and the thickness of the two limiting members 21 are respectively disposed. The mounting hole 22 is inserted between the top end and the bottom end of the fixing member 20 and the two limiting members 21, and is disposed in the same manner as the thickness X of the fixing member 20. At a key end of a lock core 40, each of the channels 23 may be a semi-circular or curved structure and penetrate the fixing member 20 to be located at the two limiting members 21 On one side, further, the fixing member 20 is provided with four passages 23, wherein two passages 23 are disposed between the two limiting members 21 and the bottom end of the fixing member 20, and the other two passages are disposed on the two limiting members 21 Between the top end of the fixing member 20;

The limiting slot 24 is rectangular and extends through the fixing member 20. The limiting slot 24 is disposed near the bottom end of the fixing member 20. The two bolt holes 25 extend through the outer side surface and the inner side surface of the fixing member 20 and are respectively located. At the top end and the bottom end of the fixing member 20, as shown in FIG. 5, the two bolts 51 are respectively inserted into the two bolt holes 25 of the fixing member 20 and are locked and coupled with the door panel 50 to make the fixing member. 20 is steadily disposed on the door panel 50, and the two protruding seats 26 are hollow and convexly formed on the inner side surface of the fixing member 20 and are respectively linearly opposed to the two bolt holes 25, and further, each protruding seat 26 is provided. When the fixing member 20 is fixed on the door panel 50, the abutting side of the two protruding seats 26 abuts against the side surface of the door panel 50. Preferably, as shown in FIG. When the door lock protection device 10 is combined with a door handle 52, the mounting hole 22' has a circular structure covering the outside of the door handle 52, and the limiting groove 24' is an elongated perforation. ;as well as

The protective cover 30 is detachably coupled to the fixing member 20 and sleeved on the fixing member 20 and the lock core 40. The protective cover 30 is provided with a top end, a bottom end, an inner side surface and an outer side surface. An opening end edge 31, a receiving groove 32, at least two limiting arms 33, an insertion hole 34, a limiting rod 35, two coupling grooves 36 and two pressing blocks 37, when the protective cover 30 and the fixing member When the two phases are combined, the inner side of the protective cover 30 abuts against the side surface of the door panel 50. The open end edge 31 extends through the inner side of the protective cover 30 and is provided with a peripheral edge. The receiving slot 32 is provided for the protection. The cover 30 is disposed between the inner side surface and the outer side surface of the protective cover 30. The receiving groove 32 is disposed outside the fixing member 20 and communicates with the open end edge 31 and is provided with a bottom surface. The at least two limits The arm 33 may be semi-circular and protruded inwardly on the circumference of the open end edge 31 and pass through the passage 23 of the fixing member 20, when the protective cover 30 is combined with the fixing member 20, the at least The two limiting arms 33 can be pressed against the two limiting members 21 of the fixing member 20, and further, each of the limiting arms 33 is provided with an inner side surface, a side surface and an outer portion. The inner side surface of the limiting arm 33 is a flat surface and can be abutted against the inner side surface of one of the limiting members 21, and the side surfaces of the limiting arms 33 are respectively disposed at right angles to the inner side surface and the outer side surface thereof, preferably The protective cover 30 is provided with four limiting arms 33 protrudingly formed on the periphery of the opening end edge 31. When the door lock protection device 10 is assembled, the limiting arms 33 are respectively passed through the fixing member. Channel 23 of 20;

Further, each of the limiting arms 33 has a thickness B, wherein the height Y of each of the protruding seats 26 is greater than or equal to the thickness B of each of the limiting arms 33, that is, Y≧B, when the protective cover 30 is combined with the fixing member 20 The abutting side of the two protruding seats 26 protrudes out of the limiting arms 33 of the protective cover 30 via the opening end edge 31 and abuts against the side surface of the door panel 50. The fixing member 20 is stably disposed on the door panel 50, and the protective cover 30 is disposed on the inner side surface of each of the limiting arms 33 and the bottom surface of the receiving slot 32. A spacing A is provided, wherein the spacing A is greater than or equal to the thickness X of the fixing member 20, that is, A≧X, and the spacing A allows the fixing member 20 to be disposed in the receiving slot 32 without being limited. a situation in which the arms 33 interfere with each other;

The insertion hole 34 may be circular or have the same shape as the mounting hole 22 , and the insertion hole 34 passes through the outer side surface of the protective cover 30 and communicates with the receiving groove 32 , and the fixing member 20 The mounting holes 22 are linearly opposed. Preferably, as shown in FIGS. 5 and 6, the insertion holes 34, 34' are in a shape conforming to the shape of the mounting holes 22, 22', and the limiting rod 35 is convex outward. The bottom surface of the receiving groove 32 is formed, and can be combined with the limiting groove 24 of the fixing member 20, thereby providing a positioning effect of the protective cover 30 relative to the fixing member 20. The coupling grooves 36 can be rectangular. And a recessed portion is disposed in the bottom surface of the receiving slot 32 and communicates with the receiving slot 32. Further, a coupling slot 36 is disposed in the protective cover 30 between the insertion hole 34 and the top end of the protective cover 30. The other coupling groove 36 is disposed in the protective cover 30 between the insertion hole 34 and the bottom end of the protective cover 30. The two pressing blocks 37 are elastic and are respectively disposed in the two coupling grooves 36. When the cover 30 is combined with the fixing member 20, the two pressing members 37 abut against the outer side surface of the fixing member 20, thereby allowing the two limiting members 21 of the fixing member 20 to At least two protective cover 30 is pressed against the stopper arm 31 abuts, so that the protective cover 30 may be firmly coupled to the fixed member 20 relative.

When the door lock protection device of the present invention is used, please refer to FIG. 3 to FIG. 5, the fixing member 20 abuts against the side surface of the door panel 50, so that the mounting hole 22 can be sleeved on the key of the lock core 40. The outer side of the end, wherein the height Y of each of the protruding seats 26 is greater than or equal to the thickness B of each of the limiting arms 33, the abutting side of each protruding seat 26 can protrude through the open end edge 31 of the protective cover 30 Each of the limiting arms 33 abuts against the side surface of the door panel 50, and the two bolts 51 respectively pass through the two bolt holes 25 and the two protruding seats 26 to be fixedly coupled with the door panel 50, thereby further fixing the fixing member 20 is firmly disposed on the side surface of the door panel 50. After the fixing member 20 is fixed to the side of the door panel 50, the protective cover 30 can be sleeved through the opening end edge 31 and the passages 23. The protective cover 30 is moved relative to the fixing member 20 in the receiving groove 32, so that the inner side of the at least two limiting arms 33 abuts the limiting member 21 of the fixing member 20, thereby avoiding The protective cover 30 is separated from the fixing member 20. In addition, since the spacing A of the protective cover 30 is greater than or equal to the thickness X of the fixing member 20, the solid The component 20 can be disposed in the accommodating groove 32 between the at least two limiting arms 33 and the bottom surface of the accommodating groove 32 without interfering with the at least two limiting arms 33. Further, The two pressing members 37 of the two fixing members 20 can be pressed against the two limiting members 21 of the fixing member 20, so that the two limiting members 21 can be pressed against the at least two limiting arms 33 of the protective cover 30. The protective cover 30 can be firmly coupled with the fixing member 20. In addition, as shown in FIG. 6, the door lock protection device 10 of the present invention can also be used on the door handle 52, thereby providing The effect of the door handle 52 is such that the door lock protection device 10 of the present invention can be used not only on the lock core 40 but also on the door handle 52, greatly improving the utility of the door lock protection device 10 of the present invention.

According to the above technical means, the door lock protection device 10 of the present invention does not need to process the slope 615 and the tilt on the fixing member 20 and the protective cover 30 respectively when manufacturing the fixing member 20 and the protective cover 30. The engaging surface 626 can greatly reduce the cost and time required for manufacturing. In addition, the processing precision requirements for manufacturing the two limiting members 21 against the at least two limiting arms 33 are compared with the manufacturing of the inclined surfaces 615 and The processing precision required for the engagement of each of the inclined engaging slopes 626 is low, and therefore, the cost and time required for manufacturing can be reduced, thereby providing a door lock protection device 10 which can be easily manufactured and reduced in manufacturing cost and time.

10‧‧‧Door lock protection device
20‧‧‧Fixed parts
21‧‧‧Limited parts
22,22'‧‧‧Installation holes
23‧‧‧ channel
24,24'‧‧‧ Limit slot
25‧‧‧Bolt hole
26‧‧‧ convex seat
30‧‧‧ protective cover
31‧‧‧Open edge
32‧‧‧ 容 槽
33‧‧‧Limited arm
34‧‧‧Into the hole
35‧‧‧Limited rod
36‧‧‧ Combination slot
37‧‧‧Pressure block
40‧‧‧Lock
50‧‧‧ Door panel
51‧‧‧ bolt
52‧‧‧ Door handle
60‧‧‧door lock protection device
61‧‧‧Fixed parts
611‧‧‧relative sidewall
612‧‧‧ card block
613‧‧‧Installation holes
614‧‧‧Bolt hole
615‧‧‧Slope
62‧‧‧ protective cover
621‧‧‧Open edge
622‧‧‧ 容 槽
623‧‧‧Clamping bumps
624‧‧‧ channel
625‧‧‧ insertion hole
626‧‧‧ Tilting engagement surface
X‧‧‧ thickness
Y‧‧‧ Height
A‧‧‧ spacing
B‧‧‧thickness

1 is a schematic perspective view of a door lock protection device of the present invention. 2 is a perspective exploded view of the door lock protection device of the present invention. Figure 3 is a side elevational view of the door lock protection device of the present invention taken along line 3-3. Figure 4 is a side elevational view of the door lock protection device of the present invention taken along line 4-4. FIG. 5 is a schematic perspective view showing the operation of the door lock protection device of the present invention mounted on a door panel and combined with a lock core. Figure 6 is a perspective view showing the operation of the door lock protection device of the present invention mounted on a door panel and combined with a door handle. FIG. 7 is a schematic perspective view of a conventional door lock protection device. Figure 8 is a side elevational view of the prior art door lock protection device. Figure 9 is a side elevational view of the prior art door lock protection device taken along line 9-9.

10‧‧‧Door lock protection device

20‧‧‧Fixed parts

22‧‧‧Installation holes

23‧‧‧ channel

25‧‧‧Bolt hole

26‧‧‧ convex seat

31‧‧‧Open edge

32‧‧‧ 容 槽

33‧‧‧Limited arm

34‧‧‧Into the hole

35‧‧‧Limited rod

Claims (8)

A door lock protection device is provided with: a fixing member, the fixing member is provided with a top end, a bottom end, an inner side surface, an outer side surface, two opposite side surfaces, a thickness, at least two limiting members, and a mounting a hole, a plurality of channels, and at least two protrusions, wherein the at least two limiting members are formed on opposite side sides of the fixing member, and each of the limiting members is provided with an inner side surface, an outer side surface, a side surface and a thickness. The inner side surface of each of the limiting members is a flat surface, and the side surfaces of each of the limiting members are respectively disposed at a right angle with the inner side surface and the outer side surface thereof, and the thickness of each of the limiting members is the same as the thickness of the fixing member, and the mounting hole runs through the same The outer side surface and the inner side surface of the fixing member are interposed between the top end and the bottom end of the fixing member and the at least two limiting members, and each channel penetrates the fixing member and is located at one side of the at least two limiting members, the at least two The protruding seat is convexly formed on the inner side surface of the fixing member, and each protruding seat is provided with an abutting side surface and a height; a protective cover, the protective cover is detachably coupled with the fixing member, and is sleeved on the Outside the fixing member, the protective cover is provided with a top end and a bottom An inner side surface, an outer side surface, an open end edge, a receiving groove, at least two limiting arms and an insertion hole, the opening end edge extending through the inner side surface of the protective cover and having a peripheral edge, the receiving groove The cover is disposed between the inner side surface and the outer side surface of the protective cover, and the receiving groove cover is disposed outside the fixing member and communicates with the open end edge and is provided with a bottom surface, the at least two limiting arms Forming a channel formed on the periphery of the open end edge and passing through the fixing member, when the protective cover is combined with the fixing member, the at least two limiting arms can be at least two limits with the fixing member The workpieces are pressed against each other, and each of the limiting arms is provided with a thickness, a side surface, an outer side surface and an inner side surface. The inner side surface is a flat surface and can be abutted against the inner side surface of one of the limiting members, and each of the limiting arms The side surfaces of the protective cover are disposed at a right angle with the outer side surface and the inner side surface of the protective cover. The protective cover is disposed at a distance between the inner side surface of each of the limiting arms and the bottom surface of the receiving groove, and the insertion hole passes through the outer side surface of the protective cover. Communicating with the receiving groove and being linearly opposite to the mounting hole of the fixing member; The height of each of the protruding seats is greater than or equal to the thickness of each of the limiting arms, so that the abutting side of each protruding seat can extend beyond the at least two limiting arms of the protective cover via the open end edge, and is located at each limit The spacing between the inner side surface of the arm and the bottom surface of the receiving groove is greater than or equal to the thickness of the fixing member, so that the fixing member is not disposed to interfere with the at least two limiting arms when disposed in the receiving groove. The door lock protection device of claim 1, wherein the protective cover is provided with at least two pressing blocks, each pressing block has elasticity and when the protective cover is combined with the fixing member, each pressing block is The outer side of the fixing member abuts. The door lock protection device of claim 2, wherein the protective cover is provided with two coupling grooves and two pressing blocks, wherein the coupling grooves are recessed in the bottom surface of the receiving groove and communicate with the receiving groove. Each pressing block is disposed in one of the coupling grooves and abuts against an outer side surface of the fixing member. The door lock protection device of claim 3, wherein the coupling groove is disposed in the protective cover between the insertion hole and the top end of the protective cover, and the other coupling groove is disposed on the protective cover. It is interposed between the insertion hole and the bottom end of the protective cover. The door lock protection device of any one of claims 1 to 4, wherein the fixing member is provided with a limiting slot, the limiting slot extends through the fixing member, and the limiting slot is disposed near the bottom of the fixing member. The protective cover is provided with a limiting rod, and the limiting rod is convexly formed on the bottom surface of the receiving groove, and can be combined with the limiting slot of the fixing member to provide the protective cover. A positioning effect relative to the fixture. The door lock protection device of claim 5, wherein the fixing member is provided with two protruding seats and two bolt holes, wherein each of the protruding seats is hollow, and the two bolt holes penetrate through the inner side and the outer side of the fixing member. The sides are respectively opposite to and in communication with the two protruding seats. The door lock protection device of claim 6, wherein the fixing member is provided with four passages, wherein two channels are disposed between the at least two limiting members and the bottom end of the fixing member, and the other two channels are disposed at Between the at least two limiting members and the top end of the fixing member. The door lock protection device of claim 7, wherein the protective cover is provided with four limiting arms protrudingly formed on the periphery of the open end edge, and each of the limiting arms is assembled when the door lock protection device is assembled. The passages of the fixing members are respectively worn.