CN219509494U - Movable threshold of civil air defense door - Google Patents
Movable threshold of civil air defense door Download PDFInfo
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- CN219509494U CN219509494U CN202320260068.8U CN202320260068U CN219509494U CN 219509494 U CN219509494 U CN 219509494U CN 202320260068 U CN202320260068 U CN 202320260068U CN 219509494 U CN219509494 U CN 219509494U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
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Abstract
The utility model belongs to the technical field of civil air defense doors, and particularly relates to a movable threshold of a civil air defense door, which comprises a plurality of threshold segment groups, wherein each threshold segment group comprises a first L-shaped threshold segment, a second L-shaped threshold segment and a locking assembly, a plurality of mounting grooves and a plurality of inverted T-shaped grooves are formed in the ground, and when the first L-shaped threshold segment and the second L-shaped threshold segment are mounted in the mounting grooves, the upper surfaces of the first L-shaped threshold segment and the second L-shaped threshold segment are flush with the ground; the inverted T-shaped groove comprises a vertical groove and a transverse groove, one end, away from the transverse groove, of the vertical groove is communicated with the mounting groove, the first L-shaped threshold section and the second L-shaped threshold section are mounted in the inverted T-shaped groove after being spliced, one end, away from the inverted T-shaped groove, of the first L-shaped threshold section and the second L-shaped threshold section is higher than the ground, and the locking assembly is used for locking the first L-shaped threshold section and the second L-shaped threshold section mounted in the inverted T-shaped groove. The threshold section group in the utility model is flush with the ground at ordinary times, and can be turned into a threshold rapidly in war, so that the installation is convenient and rapid.
Description
Technical Field
The utility model belongs to the technical field of civil air defense doors, and particularly relates to a movable threshold of a civil air defense door.
Background
The civil air defense door is one of important equipment of civil air defense engineering. The protection engineering is closed by closing the civil air defense door in the war, personnel, materials, equipment and the like in the protection engineering are protected from being damaged, and the traffic of the personnel, vehicles and materials is satisfied at ordinary times.
The prior civil air defense door threshold comprises a fixed threshold and a movable threshold, wherein the fixed threshold is a threshold welded with two ends of the door frame into a whole during manufacturing, the threshold cannot move, vehicles are inconvenient to pass at ordinary times, and material transportation is greatly hindered. The movable threshold is hidden in other places at ordinary times and is only installed in the peace warfare conversion period, so that the usual vehicle passing and material transportation are facilitated. However, because the movable threshold is hidden in other places, the movable threshold needs to be found out and transported to the civil air defense door during installation, and the operation is troublesome; moreover, during a war, the movable threshold needs to be installed in a short time, and the movable threshold needs to be searched and transported before being installed, and the movable threshold also needs to be constructed on the ground during the installation, so that the movable threshold is inconvenient to install, takes a long time and is difficult to complete the installation in a short time.
Disclosure of Invention
The utility model aims to provide a movable threshold of a civil air defense door, which aims to solve the problem of inconvenient installation of the movable threshold.
In order to achieve the above purpose, the scheme of the utility model is as follows: the movable threshold of the civil air defense door comprises a plurality of groups of threshold section groups, wherein each group of threshold section groups comprises a first L-shaped threshold section, a second L-shaped threshold section and a locking assembly, a plurality of mounting grooves and a plurality of inverted T-shaped grooves are formed in the ground, the mounting grooves are used for mounting the first L-shaped threshold section and the second L-shaped threshold section, and when the first L-shaped threshold section and the second L-shaped threshold section are mounted in the mounting grooves, the upper surfaces of the first L-shaped threshold section and the second L-shaped threshold section are all flush with the ground; the inverted T-shaped groove comprises a vertical groove and a transverse groove, one end of the vertical groove, which is far away from the transverse groove, is communicated with the mounting groove, the first L-shaped threshold section and the second L-shaped threshold section are spliced and then are mounted in the inverted T-shaped groove, one end of the first L-shaped threshold section, which is far away from the inverted T-shaped groove, and one end of the second L-shaped threshold section, which is far away from the inverted T-shaped groove, are higher than the ground, and the locking assembly is used for locking the first L-shaped threshold section and the second L-shaped threshold section which are mounted in the inverted T-shaped groove.
The working principle and the beneficial effects of the scheme are as follows: in the scheme, when the first L-shaped threshold section and the second L-shaped threshold section are installed in the installation groove, the upper surface of the first L-shaped threshold section and the upper surface of the second L-shaped threshold section are flush with the ground, so that vehicles can pass conveniently; and when the upper surface of first L type threshold section and second L type threshold section are installed in the T type inslot that falls, the one end that falls the T type inslot is kept away from to first L type threshold section and the one end that falls the T type inslot is kept away from to second L type threshold section all are higher than ground to form the threshold, hinder the vehicle to pass through, whole process easy operation, quick, thereby realize the quick installation of threshold. In addition, in the scheme, during the threshold installation period, the threshold is not required to be searched and transported, so that the time is saved, and the efficiency of threshold installation is improved.
In addition, in this scheme, utilize locking element to realize the locking of first L type threshold section and second L type threshold section to avoid first L type threshold section and second L type threshold section to be taken away from the T type inslot easily by the people.
Optionally, the locking component includes locking screw, offer first shoulder hole on the first L type threshold section, first shoulder hole includes first round hole and second round hole, and the second round hole is the screw hole, locking screw threaded connection is in the second round hole, offer on the second L type threshold section with locking screw thread fit's first screw blind hole.
In this scheme, utilize the screw-thread fit of locking screw and first screw thread blind hole, be connected first L type threshold section and second L type threshold section to, change the degree of depth that locking screw precessed in the first screw thread blind hole, can change the interval between first L type threshold section and the second L type threshold section, thereby make first L type threshold section and second L type threshold section can' T break away from the transverse groove in reverse T type groove, and then realize the locking to first L type threshold section and second L type threshold section, avoid first L type threshold section and second L type threshold section to be taken away by the people easily. And the locking screw is completely sunk in the first stepped hole, so that the surface flatness of the first L-shaped threshold section is not affected.
Optionally, the locking component includes a plurality of locking screw, a plurality of second shoulder holes with transverse groove intercommunication have been seted up to the diapire of mounting groove, and the second shoulder hole includes third round hole and fourth round hole, and the fourth round hole is the screw hole, locking screw threaded connection in the fourth round hole, set up on first L type threshold section and the second L type threshold section with locking screw thread complex second screw blind hole.
In this scheme, after first L type threshold section and second L type threshold section are installed in the type of falling T inslot, utilize the screw-thread fit of locking screw and second screw thread blind hole, lock first L type threshold section and second L type threshold section in the type of falling T inslot, avoid first L type threshold section and second L type threshold section to be taken away by the people easily. And the locking screw is completely sunk in the second step hole, so that the flatness of the bottom wall of the mounting groove cannot be affected.
Optionally, third stepped holes are formed in the first L-shaped threshold section and the second L-shaped threshold section, each third stepped hole comprises a fifth round hole and a sixth round hole, each sixth round hole is a threaded hole, the sixth round holes are in threaded connection with locking screws, and third threaded blind holes matched with the locking screws in a threaded mode are formed in the bottom wall of the mounting groove.
In this scheme, utilize locking screw and the screw-thread fit of third screw thread blind hole, lock first L type threshold section and second L type threshold section in the mounting groove, avoid at ordinary times first L type threshold section and second L type threshold section by others take away. And, because the locking screw is totally sunk in the third stepped hole, the surface flatness of the first L-shaped threshold section and the second L-shaped threshold section can not be influenced.
Optionally, the diapire fixedly connected with a plurality of felting needles of mounting groove, all offer on first L type threshold section and the second L type threshold section and supply the holding tank that the felting needle was put into.
In this scheme, after first L type threshold section and second L type threshold section traded the T type inslot of falling from the mounting groove, the pjncture needle in the mounting groove exposes to can puncture the tire of the vehicle of forcing through, further hinder the vehicle to pass.
Optionally, the locking screw comprises a head and a rod, and the head is provided with a special-shaped anti-theft groove.
In this scheme, special-shaped anti-theft groove makes locking screw need purpose-made screwdriver just can take out to prevent that first L type threshold section and second L type threshold section from being stolen.
Optionally, the locking screw comprises a head and a rod, and the head is provided with a special-shaped anti-theft groove.
In this scheme, special-shaped anti-theft groove makes locking screw need purpose-made screwdriver just can take out to prevent that first L type threshold section and second L type threshold section from being taken away easily by the people.
Optionally, the locking screw comprises a head and a rod, and the head is provided with an anti-theft protruding part.
In this scheme, theftproof bellying makes locking screw need purpose-made, have the screwdriver of the recess that suits with theftproof bellying just can take out to prevent that first L type threshold section and second L type threshold section from being stolen.
Optionally, the locking screw comprises a head and a stem, and the head is provided with an anti-theft protruding part.
In this scheme, theftproof bellying makes locking screw need purpose-made, have the screwdriver of the recess that suits with theftproof bellying just can take out to prevent that first L type threshold section and second L type threshold section from being taken away easily by the people.
Optionally, a support block for supporting the first L-shaped threshold section and the second L-shaped threshold section is installed in the inverted T-shaped groove.
In this scheme, the supporting shoe supports the opposite end of first L type threshold section and second L type threshold section, avoids its bending deformation to take place.
Drawings
Fig. 1 is a longitudinal sectional view of a movable threshold of a civil air defense door according to a first embodiment of the present utility model;
fig. 2 is a longitudinal sectional view of a rocker section group according to a first embodiment of the present utility model;
FIG. 3 is a longitudinal cross-sectional view of the first L-shaped threshold section, the second L-shaped threshold section and the support block of the first embodiment of the utility model after leaving the mounting groove;
FIG. 4 is a longitudinal cross-sectional view of a first L-shaped rocker section and a second L-shaped rocker section of a first embodiment of the present utility model installed in an inverted T-shaped channel;
FIG. 5 is a top view of the locking screw of FIG. 2;
FIG. 6 is a longitudinal sectional view of a movable threshold of a civil air defense door in accordance with a second embodiment of the present utility model;
FIG. 7 is a longitudinal cross-sectional view of a second embodiment of the present utility model with a first L-shaped rocker section and a second L-shaped rocker section mounted in an inverted T-shaped channel;
fig. 8 is a top view of a locking screw according to a third embodiment of the present utility model.
Detailed Description
The following is a further detailed description of the embodiments:
the labels in the drawings of this specification include: the first L-shaped threshold section 1, the second L-shaped threshold section 2, the transverse section 110, the accommodating groove 111, the first stepped hole 112, the first threaded blind hole 113, the third stepped hole 114, the vertical section 120, the second threaded blind hole 121, the mounting groove 3, the third threaded blind hole 301, the second stepped hole 302, the inverted T-shaped groove 4, the vertical groove 410, the transverse groove 420, the supporting block 5, the puncture needle 6, the locking screw 7, the head 710, the special-shaped anti-theft groove 711, the anti-theft boss 712, the rod 720, the locking screw 8 and the ground 9.
Example 1
This embodiment is basically as shown in fig. 1, 2 and 3: the movable threshold of the civil air defense door comprises a plurality of threshold section groups, each threshold section group comprises a first L-shaped threshold section 1, a second L-shaped threshold section 2 and a locking assembly, a plurality of mounting grooves 3 and a plurality of inverted T-shaped grooves 4 are formed in the ground 9, and the number of the mounting grooves 3 and the number of the inverted T-shaped grooves 4 are the same as the number of the threshold section groups.
The mounting groove 3 is used for mounting the first L-shaped threshold section 1 and the second L-shaped threshold section 2, and when the first L-shaped threshold section 1 and the second L-shaped threshold section 2 are mounted in the mounting groove 3, the upper surface of the first L-shaped threshold section 1 and the upper surface of the second L-shaped threshold section 2 are flush with the ground 9. The inverted T-shaped groove 4 comprises a vertical groove 410 and a transverse groove 420, the top end of the vertical groove 410 is communicated with the mounting groove 3, and the first L-shaped threshold section 1 and the second L-shaped threshold section 2 are supported in the vertical groove 410. The first L-shaped threshold section 1 and the second L-shaped threshold section 2 are spliced and then are installed in the inverted T-shaped groove 4, and the top end of the first L-shaped threshold section 1 and the top end of the second L-shaped threshold section 2 are higher than the ground 9. The first L-shaped threshold section 1 and the second L-shaped threshold section 2 comprise a transverse section 110 and a vertical section 120, a plurality of needles 6 are welded on the bottom wall of the mounting groove 3, and accommodating grooves 111 for accommodating the needles 6 are formed in the transverse section 110 of the first L-shaped threshold section 1 and the transverse section 110 of the second L-shaped threshold section 2.
The locking component is used for locking the first L type threshold section 1 and the second L type threshold section 2 of installing in the T type groove 4 that falls, in this embodiment, the locking component includes locking screw 7, has seted up first shoulder hole 112 on the horizontal section 110 of first L type threshold section 1, and first shoulder hole 112 includes first round hole and second round hole, and the second round hole is the screw hole, and locking screw 7 threaded connection is in the second round hole, has seted up on the horizontal section 110 of second L type threshold section 2 with locking screw 7 screw thread complex first screw thread blind hole 113.
The transverse section 110 of the first L-shaped threshold section 1 and the transverse section 110 of the second L-shaped threshold section 2 are respectively provided with a third stepped hole 114, the third stepped holes 114 comprise a fifth circular hole and a sixth circular hole, the sixth circular hole is a threaded hole, the sixth circular hole is in threaded connection with the locking screw 8, and the bottom wall of the mounting groove 3 is provided with a third threaded blind hole 301 in threaded fit with the locking screw 8.
The locking screw 8 and the locking screw 7 both comprise a head 710 and a rod 720, the head 710 is provided with a special-shaped anti-theft groove 711, and the special-shaped anti-theft groove 711 is four L-shaped grooves uniformly distributed on the head 710 as shown in fig. 5, and the intersection point of the central connecting lines of the two L-shaped grooves on the diagonal line coincides with the round point of the head 710.
At ordinary times, the first L-shaped threshold section 1 and the second L-shaped threshold section 2 are installed in the installation groove 3, and the locking screw 8 is in threaded connection with a third threaded hole on the bottom wall of the installation groove 3, so that the first L-shaped threshold section 1 and the second L-shaped threshold section 2 are fixed in the installation groove 3, and because the locking screw 8 in the embodiment needs a special screwdriver which is matched with the special-shaped anti-theft groove 711 to take out, the first L-shaped threshold section 1 and the second L-shaped threshold section 2 are not easy to be stolen. At this time, the upper surface of the first L-shaped rocker section 1 and the upper surface of the second L-shaped rocker section 2 are both flush with the ground 9 for the passage of vehicles.
During the peace and war conversion period, an operator rotates the locking screw 8 by using a special screwdriver, so that the locking screw 8 is separated from the third threaded blind hole 301 of the mounting groove 3, the fixation of the first L-shaped threshold section 1 and the second L-shaped threshold section 2 is released, then the operator takes the first L-shaped threshold section 1 and the second L-shaped threshold section 2 out of the mounting groove 3, and then the supporting block 5 is taken out of the vertical groove 410 to be mounted into the inverted T-shaped groove 4 after the conversion direction is taken out, namely the vertical section 120 of the first L-shaped threshold section 1 and the vertical section 120 of the second L-shaped threshold section 2 are positioned in the transverse groove 420, and the transverse section 110 of the first L-shaped threshold section 1 and the transverse section 110 of the second L-shaped threshold section 2 are in a vertical state. Then, the operator rotates the locking screw 7 by using a special screwdriver, so that the locking screw 7 is screwed into the first threaded blind hole 113 of the second L-shaped threshold section 2, thereby connecting the first L-shaped threshold section 1 and the second L-shaped threshold section 2 together, as shown in fig. 4, so that the vertical sections 120 and 120 of the first L-shaped threshold section 1 and the second L-shaped threshold section 2 are limited by the vertical groove 410, and the vertical sections 120 and 120 of the first L-shaped threshold section 1 and the second L-shaped threshold section 2 cannot be separated from the transverse groove 420, i.e., the first L-shaped threshold section 1 and the second L-shaped threshold section 2 cannot be easily taken away by a person. And, the transverse section 110 of the first L-shaped threshold section 1 and the transverse section 110 of the second L-shaped threshold section 2 are both higher than the ground 9, thereby forming a threshold that impedes the passage of vehicles. The whole process is simple and quick to operate, so that the rapid installation of the doorsill is realized. In addition, in the embodiment, during the threshold installation period, the threshold is not required to be searched and transported, so that the time is saved, and the efficiency of the threshold installation is improved.
Furthermore, after the first L-shaped threshold section 1 and the second L-shaped threshold section 2 are installed in the inverted T-shaped groove 4 in a transferring mode, the puncture needle 6 in the installation groove 3 is exposed, and when a vehicle passes through in a strong mode, the puncture needle 6 punctures the tire of the vehicle, and the vehicle is further prevented from passing through.
Example two
The present embodiment differs from the first embodiment in that: as shown in fig. 6 and 7, in this embodiment, the locking assembly includes a plurality of locking screws 7, the bottom wall of the installation groove 3 is provided with a plurality of second stepped holes 302 which are communicated with the transverse groove 420, the second stepped holes 302 include a third circular hole and a fourth circular hole, the fourth circular hole is a threaded hole, the locking screws 7 are in threaded connection with the fourth circular hole, and the vertical sections 120 and 120 of the first L-shaped threshold section 1 and the second L-shaped threshold section 2 are provided with second threaded blind holes 121 in threaded fit with the locking screws 7. In this embodiment, the number of the locking screws 7 and the second stepped holes 302 is two, and the two second stepped holes 302 are distributed at both ends of the transverse groove 420.
In the embodiment, during the peace warfare conversion period, an operator uses a special screwdriver to rotate the locking screw 8, so that the locking screw 8 is separated from the third threaded blind hole 301 of the mounting groove 3, the fixation of the first L-shaped threshold section 1 and the second L-shaped threshold section 2 is released, and then the operator takes the first L-shaped threshold section 1 and the second L-shaped threshold section 2 out of the mounting groove 3; turning the locking screw 7 by using a special screwdriver to enable the locking screw 7 to move upwards; then, the operator installs the first L-shaped threshold section 1 and the second L-shaped threshold section 2 into the inverted T-shaped groove 4 after switching the direction, that is, the vertical section 120 of the first L-shaped threshold section 1 and the vertical section 120 of the second L-shaped threshold section 2 are located in the transverse groove 420, and the transverse section 110 of the first L-shaped threshold section 1 and the transverse section 110 of the second L-shaped threshold section 2 are in a vertical state. Then, an operator uses a special screwdriver to rotate the locking screw 7, so that the locking screw 7 moves downwards and is screwed into the second threaded blind holes 121 on the first L-shaped threshold section 1 and the second L-shaped threshold section 2, thereby fixing the first L-shaped threshold section 1 and the second L-shaped threshold section 2, avoiding that the first L-shaped threshold section 1 and the second L-shaped threshold section 2 are easily taken away by people, and playing a certain anti-theft role.
Example III
The present embodiment differs from the first embodiment in that: as shown in fig. 8, the locking screw 8 and the locking screw 7 each comprise a head 710 and a rod 720, the head 710 is integrally formed with an anti-theft protrusion 712, the anti-theft protrusion 712 is four L-shaped protrusions uniformly distributed on the head 710, and the intersection point of the central connecting lines of the two L-shaped protrusions located on the diagonal coincides with the round point of the head 710.
In this embodiment, a special screwdriver having a recess to fit the antitheft protrusion 712 is required to remove the locking screw 8 and the locking screw 7, thereby preventing the first L-shaped threshold section 1 and the second L-shaped threshold section 2 from being easily removed by a person.
The foregoing is merely exemplary embodiments of the present utility model, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the practical applicability of the present utility model. The description of the embodiments and the like in the specification can be used for explaining the contents of the claims.
Claims (10)
1. People's air defense door activity threshold, its characterized in that: the ground locking device comprises a plurality of groups of threshold section groups, wherein each group of threshold section groups comprises a first L-shaped threshold section, a second L-shaped threshold section and a locking assembly, a plurality of mounting grooves and a plurality of inverted T-shaped grooves are formed in the ground, the mounting grooves are used for mounting the first L-shaped threshold section and the second L-shaped threshold section, and when the first L-shaped threshold section and the second L-shaped threshold section are mounted in the mounting grooves, the upper surfaces of the first L-shaped threshold section and the second L-shaped threshold section are flush with the ground; the inverted T-shaped groove comprises a vertical groove and a transverse groove, one end of the vertical groove, which is far away from the transverse groove, is communicated with the mounting groove, the first L-shaped threshold section and the second L-shaped threshold section are spliced and then are mounted in the inverted T-shaped groove, one end of the first L-shaped threshold section, which is far away from the inverted T-shaped groove, and one end of the second L-shaped threshold section, which is far away from the inverted T-shaped groove, are higher than the ground, and the locking assembly is used for locking the first L-shaped threshold section and the second L-shaped threshold section which are mounted in the inverted T-shaped groove.
2. The people's air defense door movable threshold according to claim 1 wherein: the locking assembly comprises a locking screw, a first stepped hole is formed in the first L-shaped threshold section, the first stepped hole comprises a first round hole and a second round hole, the second round hole is a threaded hole, the locking screw is in threaded connection with the second round hole, and a first threaded blind hole matched with the locking screw in threaded mode is formed in the second L-shaped threshold section.
3. The people's air defense door movable threshold according to claim 1 wherein: the locking assembly comprises a plurality of locking screws, a plurality of second stepped holes communicated with the transverse grooves are formed in the bottom wall of the mounting groove, each second stepped hole comprises a third round hole and a fourth round hole, each fourth round hole is a threaded hole, the locking screws are connected with the fourth round holes in a threaded mode, and second threaded blind holes matched with the locking screws in threaded mode are formed in the first L-shaped threshold section and the second L-shaped threshold section.
4. A people's air defense door movable threshold according to claim 1 or 2 or 3, wherein: third stepped holes are formed in the first L-shaped threshold section and the second L-shaped threshold section, each third stepped hole comprises a fifth round hole and a sixth round hole, each sixth round hole is a threaded hole, a locking screw is connected with the sixth round hole in a threaded mode, and a third threaded blind hole matched with the locking screw in a threaded mode is formed in the bottom wall of the mounting groove.
5. The people's air defense door movable threshold according to claim 1 wherein: the bottom wall of the mounting groove is fixedly connected with a plurality of prickers, and accommodating grooves for the prickers to be placed are formed in the first L-shaped threshold section and the second L-shaped threshold section.
6. The people's air defense door movable threshold according to claim 4 wherein: the locking screw comprises a head and a rod, and the head is provided with a special-shaped anti-theft groove.
7. A people's air defense door action threshold according to claim 2 or 3, wherein: the locking screw comprises a head and a rod, and the head is provided with a special-shaped anti-theft groove.
8. The people's air defense door movable threshold according to claim 4 wherein: the locking screw comprises a head and a rod, and the head is provided with an anti-theft protruding part.
9. A people's air defense door action threshold according to claim 2 or 3, wherein: the locking screw comprises a head and a rod, and the head is provided with an anti-theft protruding part.
10. The people's air defense door movable threshold according to claim 1 wherein: and a supporting block used for supporting the first L-shaped threshold section and the second L-shaped threshold section is arranged in the inverted T-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320260068.8U CN219509494U (en) | 2023-02-20 | 2023-02-20 | Movable threshold of civil air defense door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320260068.8U CN219509494U (en) | 2023-02-20 | 2023-02-20 | Movable threshold of civil air defense door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219509494U true CN219509494U (en) | 2023-08-11 |
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ID=87529610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320260068.8U Active CN219509494U (en) | 2023-02-20 | 2023-02-20 | Movable threshold of civil air defense door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219509494U (en) |
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2023
- 2023-02-20 CN CN202320260068.8U patent/CN219509494U/en active Active
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