CN209526375U - A kind of switchgear with convenient for stablizing the support construction of cabinet door - Google Patents
A kind of switchgear with convenient for stablizing the support construction of cabinet door Download PDFInfo
- Publication number
- CN209526375U CN209526375U CN201920080168.6U CN201920080168U CN209526375U CN 209526375 U CN209526375 U CN 209526375U CN 201920080168 U CN201920080168 U CN 201920080168U CN 209526375 U CN209526375 U CN 209526375U
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- China
- Prior art keywords
- sliding block
- cabinet door
- pin
- right half
- left half
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Abstract
The utility model relates to a kind of switchgears with convenient for stablizing the support construction of cabinet door, belong to the technical field of cabinet door support device, its key points of the technical solution are that a kind of switchgear with convenient for stablizing the support construction of cabinet door, including cabinet body and cabinet door, the cabinet body includes crossbeam, the upper end of crossbeam is fixed with horizontal positioning plate, the upper surface of positioning plate offers guiding groove, sliding rail is arranged in the lower section of guiding groove, sliding rail is fixedly connected with cabinet body, the bottom of sliding rail offers multiple location holes, fixed link is fixedly connected on the inside of cabinet door, fixed link is hinged with horizontal connecting rod, the other end of connecting rod is provided with the vertical positioning pin of central axis, the bottom end of positioning pin is adapted with sliding slot, positioning pin includes that left half pin and right half sell, left half pin is with right half pin articulated connection and bottom has been respectively articulated with half sliding block of a left side and right half sliding block, left half sliding block It is fixedly connected with spring between right half sliding block, is stablized when achieving the effect that cabinet door is kept to open in order to operation in cabinet.
Description
Technical field
The utility model relates to the technical field of cabinet door support device more particularly to a kind of branch with convenient for stablizing cabinet door
The switchgear of support structure.
Background technique
Switch cabinet temperature on-line monitoring system is to be for what switchgear carried out thermometric based on wireless temperature measurement technological development
System facilitates operation maintenance personnel and remote monitoring center to grasp field device operating condition.
Most of cabinet has cabinet body and cabinet door two parts, is usually to be connected by a hinge between cabinet door and cabinet body,
People open cabinet door and just need to close cabinet door after hours.
But in actual operation, the cabinet door that open is often because of the reasons such as extraneous collision of wind-force or personnel
Cabinet door is caused to be shaken, the unstable work to staff in cabinet of cabinet door impacts.
Utility model content
The purpose of this utility model is to provide stablize when a kind of holding cabinet door opens in order to which operation has in cabinet
Convenient for stablize cabinet door support construction switchgear.
The technical purpose of the utility model has the technical scheme that
A kind of switchgear with convenient for stablizing the support construction of cabinet door, including cabinet body and cabinet door, cabinet door and cabinet body
Vertical hinged, the cabinet body includes crossbeam, and the upper end of crossbeam is fixed with a horizontal positioning plate, and the upper surface of positioning plate opens up
There is a horizontal guiding groove, guiding groove is parallel with crossbeam, and sliding rail is arranged in the lower section of guiding groove, and sliding rail is fixedly connected with cabinet body,
Sliding rail offer it is multiple open up the equally distributed location hole in direction along guiding groove, be fixedly connected with fixation on the inside of cabinet door
Bar, fixed link are hinged with a horizontal connecting rod, and the other end of connecting rod is provided with the vertical positioning pin of central axis, positioning pin
Bottom end be adapted with sliding slot, positioning pin includes that left half pin and right half sell, left half pin and right half pin articulated connection, left half pin and right
The bottom of half pin has been respectively articulated with left half sliding block and right half sliding block, is fixedly connected between left half sliding block and right half sliding block horizontal
Spring, when spring nature, left half sliding block and right half sliding block are greater than location hole along guidance flute length far from the distance of spring two sides
The width in degree direction, when spring is compressed, left half sliding block and right half sliding block are less than location hole edge far from the distance of spring two sides and draw
The width of guide groove length direction.
Through the above technical solutions, cabinet door drives fixed link mobile, and fixed link drives connecting rod to move when opening cabinet door
Dynamic, connecting rod drives positioning pin to move on guiding groove and sliding rail, when cabinet door is opened to suitable position, makes left half pin and right half
The top of pin is to close, while half sliding block of a left side and half sliding block of the right side of left half pin and right half pin bottom end are mutually close, make the bottom of positioning pin
The width at end reduces, to drop into location hole under positioning pin, after falling in location hole, unclamps the top of left half pin and right half pin
End, spring automatic spring abut left half sliding block and right half sliding block with the inner wall of location hole, so that cabinet door position is fixed,
In cabinet after hours, positioning pin is pulled out from location hole, the shape of spring is restored, and cabinet door is closed, and cabinet door drives solid
Fixed pole is mobile, and fixed link drives connecting rod mobile, and connecting rod drives positioning pin to move on guiding groove and sliding rail, until cabinet door is closed
On, achieve the effect that stabilization when cabinet door being kept to open in order to operation in cabinet.
The utility model is further arranged to: the top of left half pin and right half pin is fixedly connected with adjustment portion, vertically
The distance being adjusted up between portion becomes larger.
Through the above technical solutions, make the top of left half pin and right half pin close to when, hand pinches adjustment portion, when making to adjust more
It is convenient, improve the convenience of operation.
The utility model is further arranged to: the hinge joint upper and lower position of left half pin and right half pin is arranged with cylinder,
The inner wall of left half pin and cylinder is articulated and connected.
Through the above technical solutions, cylinder can preferably limit the maximum angle of left half pin and right half pin, meanwhile, cylinder
It is set in left half pin and right half and sells the outside of hinge joint, cylinder plays the protective effect to hinge joint, improves the use of positioning pin
Service life.
The utility model is further arranged to: the bottom of left half sliding block is fixedly connected with support plate, and support plate is from a left side
The bottom of half sliding block extends to the bottom for just contacting right half sliding block.
Through the above technical solutions, support plate covers in the spring between left half pin and right half pin, make left half sliding block and the right side
The bottom end of half sliding block does not have gap, when positioning pin slides on the slide rail, will not be stuck between location hole, ensure that positioning pin slides
Smoothness.
The utility model is further arranged to: the spring is provided with multiple, and multiple springs are in left half sliding block and right half
It is uniformly distributed between sliding block.
Through the above technical solutions, after spring is compressed, the setting of multiple springs ensure that and be capable of providing enough elastic force
After so that left half sliding block and right half sliding block is drawn out location hole, restores the distance between left half sliding block and right half sliding block, uniformly set
Setting keeps the elastic force between left half sliding block and right half sliding block uniform.
The utility model is further arranged to: right half sliding block is fixedly connected with horizontal guiding bar, guiding bar and a left side
Half sliding block is slidably connected, and what guiding bar was parallel to guiding groove opens up direction.
Through the above technical solutions, driving left half sliding block and right half when the angle change between left half pin and right half pin
The variation of the distance between sliding block, left half sliding block are slided along guiding bar, and guiding bar plays guiding function to left half sliding block, ensure that
The opposite face of left half sliding block and right half sliding block keeps vertical.
The utility model is further arranged to: there are two the guiding bar settings, and two guiding bars are in up and down diagonally to set
It sets.
Through the above technical solutions, improve the stability slided between left half sliding block and right half sliding block, guiding bar it is upper
Lower setting, when ensure that left half sliding block and right half sliding block distance change, opposite face is able to maintain vertically.
The utility model is further arranged to: the inner wall of the location hole is fixedly connected with cushion rubber layer.
Through the above technical solutions, when positioning pin falls into location hole, touch cushion rubber layer, rubber quality it is soft and have compared with
Good elasticity, plays buffer function to positioning pin, reduces the abrasion of positioning pin, increase its service life, while unclamping adjustment portion
When, spring restores deformation, pushes against positioning pin and cushion rubber layer, and rubber has biggish frictional force, is positioning positioning pin
It is fixed more firm in hole.
In conclusion the advantageous effects of the utility model are as follows:
1, by opening up guiding groove in positioning plate, sliding rail is arranged in the lower section of guiding groove, and sliding rail opens up location hole, and cabinet door is solid
Surely it is connected and fixed bar, positioning pin is arranged in the other end of fixed link articulated linkage, connecting rod, and the bottom end of positioning pin is adapted with sliding slot,
Achieve the effect that stabilization when cabinet door being kept to open in order to operation in cabinet；
2, by being fixedly connected with guiding bar in right half sliding block, guiding bar is slidably connected with left half sliding block, and guiding bar is to left half
Sliding block plays guiding function, ensure that the stabilization of relative position between left half sliding block and right half sliding block；
3, the inner wall of location hole is fixedly connected with cushion rubber layer, and rubber quality is soft and has preferable elasticity, to positioning pin
Buffer function is played, the abrasion of positioning pin is reduced, increases its service life, keeps positioning pin fixed more firm in positioning hole.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the partial enlargement diagram in Fig. 1 at A；
Fig. 3 is the partial cutaway schematic of cabinet；
Fig. 4 is the partial structural diagram of the utility model;
Fig. 5 is the partial structural diagram for concealing cabinet body.
Appended drawing reference: 1, cabinet body；11, cabinet door；111, fixed link；1111, connecting rod；12, crossbeam；121, reinforcing rib；2,
Transverse slat；21, lead screw；211, rotating member；212, supporting element；2121, idler wheel；3, positioning plate；31, guiding groove；32, sliding rail；321,
Location hole；3211, cushion rubber layer；4, positioning pin；41, Zuo Banxiao；411, left half sliding block；4111, support plate；42, right half sells；
421, right half sliding block；4211, guiding bar；5, spring；6, adjustment portion；7, cylinder.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
A kind of switchgear with convenient for stablizing the support construction of cabinet door, as shown in figures 1 and 3, including cabinet body 1 and cabinet
Door 11, cabinet door 11 and cabinet body 1 are vertical hinged, and cabinet body 1 includes crossbeam 12, and crossbeam 12 is located at cabinet body 1 and is open the bottom of side, cross
The upper end of beam 12 is fixedly connected with a horizontal positioning plate 3, and the upper surface of positioning plate 3 offers a horizontal guiding groove
31, guiding groove 31 is parallel with crossbeam 12, and sliding rail 32 is arranged in the underface of guiding groove 31, and sliding rail 32 is fixedly connected with cabinet body 1, sliding rail
32 directions for being parallel to crossbeam 12 are the length direction of sliding rail 32, and the bottom of sliding rail 32 offers multiple location holes 321, Duo Geding
Position hole 321 is uniformly distributed along the length direction of sliding rail 32, the position of 11 inside of cabinet door and close cabinet door 11 and the hinged side of cabinet body 1
It sets and is fixedly connected with fixed link 111, fixed link 111 is hinged with a horizontal connecting rod 1111 far from one end of cabinet door 11, even
Bar 1111 is provided with the vertical positioning pin of central axis 4 far from one end of fixed link 111, and positioning pin 4 is adapted with sliding rail 32,
And it can fall into location hole 321.Cabinet door 11 is opened, cabinet door 11 drives fixed link 111 mobile, and fixed link 111, which drives, to be connected
Bar 1111 is mobile, and connecting rod 1111 drives positioning pin 4 to move on guiding groove 31 and sliding rail 32, when cabinet door 11 is opened to suitable position
When setting, positioning pin 4 is stuck at location hole 321 corresponding to suitable position.Stabilization when cabinet door 11 being kept to open is reached
In order to the effect of operation in cabinet.
As depicted in figs. 1 and 2,11 inner wall of cabinet door rotates far from the lower position of cabinet door 11 and the hinged side of cabinet body 1 and connects
It is connected to idler wheel 2121, when cabinet door 11 is shut, idler wheel 2121 can be resisted against the upper surface of positioning plate 3.When closing cabinet door 11,
The arcwall face of inertia force drive idler wheel 2121 is rolled to the upper surface of positioning plate 3 from the edge of positioning plate 3, without holding in the palm manually
It plays cabinet door 11 to be closed, has achieved the effect that turn off cabinet door 11 more laborsaving.
As shown in figure 4, positioning pin 4 includes half pin 41 of a left side and right half pin 42, half pin 41 of a left side and right half pin 42 are articulated and connected, and
Half pin 41 of a left side and right half pin 42 intersect, and the bottom of half pin 41 of a left side and right half pin 42 has been respectively articulated with left half sliding block 411 and the right side
Half sliding block 421 is fixedly connected with the spring 5 of multiple levels between left half sliding block 411 and right half sliding block 421, and multiple springs 5 exist
It is uniformly distributed between left half sliding block 411 and the opposite face of right half sliding block 421, the deformation direction of spring 5 and the length side of sliding rail 32
To consistent, the top of half pin 41 of a left side and right half pin 42 is fixedly connected with adjustment portion 6, and the distance between adjustment portion 6 is in side straight up
It becomes larger upwards, the hinge joint of half pin 41 of a left side and right half pin 42 is hinged with cylinder 7 simultaneously, and cylinder 7 is sheathed on 41 He of left half pin
The outside of right half pin 42, cylinder 7 are slidably connected with the rotation of connecting rod 1111, and the center line of cylinder 7 is vertical, and cylinder 7 limits left half and sells
41 and right half pin 42 maximum angle, and play the protective effect to hinge joint, the bottom of left half sliding block 411 is fixedly connected with branch
Fagging 4111, support plate 4111 is wide with left half sliding block 411 on the length direction perpendicular to sliding rail 32, and support plate 4111 is from a left side
The bottom of half sliding block 411 extends to the bottom for just contacting right half sliding block 421, and right half sliding block 421 is fixedly connected with two levels
Guiding bar 4211, two guiding bars 4211 are on right half sliding block 421 vertical plane opposite with left half sliding block 411 in up and down diagonally
Setting, guiding bar 4211 are parallel to the length direction of sliding rail 32, and guiding bar 4211 is slidably connected with left half sliding block 411, guiding bar
4211 ensure that the stability slided between left half sliding block 411 and right half sliding block 421, setting up and down, the guarantee of guiding bar 4211
When half sliding block 411 of a left side and right half 421 distance change of sliding block, the opposite face of right half sliding block 421 and half sliding block 411 of a left side is able to maintain
Vertical shift, the inner wall of location hole 321 are fixedly connected with cushion rubber layer 3211, and rubber quality is soft and has preferable elasticity, right
Positioning pin 4 plays buffer function.When cabinet door 11 is opened to suitable position, keep the top of half pin 41 of a left side and right half pin 42 mutual
It is close, it drives left half pin 41 and half sliding block 411 of a left side of 42 bottom end of right half pin and right half sliding block 421 mutually close, makes the bottom of positioning pin 4
The width at end reduces, to dropped into location hole 321 under positioning pin 4, after falling in location hole 321, unclamps left half pin 41 and the right side
The top of half pin 42,5 automatic spring of spring abut left half sliding block 411 and right half sliding block 421 with the inner wall of location hole 321, fixed
The position of position pin 4 is fixed, so that 11 position of cabinet door is fixed.
As depicted in figs. 1 and 2, lower position of 11 inner wall of cabinet door far from cabinet door 11 and the hinged side of cabinet body 1 is fixed connects
Horizontal transverse slat 2 there are two connecing, and two transverse slats 2 are setting up and down, transverse slat 2 is provided with lead screw 21, and lead screw 21 is arranged two, lead screw
21 pass vertically through the transverse slat 2 of lower section and are rotatablely connected with the transverse slat of lower section 2, and the transverse slat of lead screw 21 and top is rotatablely connected, lead screw
21 bottom end is provided with rotating member 211, and two lead screws 21 are threaded with supporting element 212, supporting element be located at two transverse slats 2 it
Between, supporting element 212 is U-shaped structure, and the bottom level of supporting element 212 is threadedly coupled to extension outside U-shaped two sides with lead screw 21,
The top horizontal of supporting element 212 is rotatablely connected to extension outside U-shaped two sides with lead screw 21, and U-bracket is unlikely to deform, improves
The service life of bracket, idler wheel 2121 and supporting element 212 are rotatablely connected, and the pivot center of idler wheel 2121 perpendicular to lead screw 21 and is put down
Row is in cabinet door 11, and supporting element 212 is bolted with idler wheel 2121, and bolt is rotated with idler wheel 2121 and supporting element 212
Connection, in position corresponding with idler wheel 2121, crossbeam 12 is that chamfering connects with the junction of positioning plate 3.
As shown in Figure 3 and Figure 5, reinforcing rib 121 is fixedly connected between crossbeam 12 and positioning plate 3, reinforcing rib 121 increases
The intensity of positioning plate 3 avoids the deformation of positioning plate 3.
The implementation principle of the present embodiment are as follows: when opening cabinet door 11, cabinet door 11 drives fixed link 111 mobile, fixed link
111 drive connecting rod 1111 mobile, and it is mobile that connecting rod 1111 drives cylinder 7, while driving positioning pin 4 on guiding groove 31 and sliding rail 32
It is mobile, when cabinet door 11 is opened to suitable position, adjustment portion 6 is clutched, keeps the top of half pin 41 of a left side and right half pin 42 close, together
When 42 bottom end of left half pin 41 and right half pin half sliding block 411 of a left side and half sliding block 421 of the right side it is mutually close, make the width of the bottom end of positioning pin 4
Degree reduces, to dropped into location hole 321 under positioning pin 4, touches cushion rubber layer 3211,3211 pairs of cushion rubber layer positioning
Pin 4 plays buffer function, after falling in location hole 321, unclamps adjustment portion 6, spring 5 restores deformation automatic spring, left half sliding block
Distance becomes larger between 411 and right half sliding block 421, pushes against positioning pin 4 and cushion rubber layer 3211, positioning pin 4 is in location hole 321
It is fixed more firm, to keep cabinet door fixed more firm.In cabinet after hours, clutch adjustment portion 6, by positioning pin 4 from
It is pulled out in location hole 321, the shape of spring 5 is restored, and distance becomes larger between left half sliding block 411 and right half sliding block 421, closes cabinet door
11, cabinet door 11 drives fixed link 111 mobile, and fixed link 111 drives connecting rod 1111 mobile, and connecting rod 1111 drives positioning pin 4 to exist
Moved on guiding groove 31 and sliding rail 32, until cabinet door 11 is finally closed, reached stabilization when cabinet door 11 being kept to open so as to
In the effect of operation in cabinet.
Rotating member 211 is adjusted, rotating member 211 drives lead screw 21 to rotate, and adjusts the height of idler wheel 2121, closes cabinet door 11
Idler wheel 2121 can just be resisted against the upper surface of positioning plate 3 when upper, and cabinet door 11 is closed closely, when closing cabinet door 11,
The circumferential surface of inertia force drive idler wheel 2121 is rolled to the upper surface of positioning plate 3 from the chamfering inclined-plane of crossbeam 12 and positioning plate 3,
Angle inclined-plane makes the movement of idler wheel 2121 become gentle, and circumferential surface is arcwall face, carries out without holding up cabinet door 11 manually
It closes, has achieved the effect that turn off cabinet door 11 more laborsaving, while idler wheel 2121 plays effective picking-up to cabinet door 11
Supporting role can effectively slow down the speed heavier and sagging because of own wt of cabinet door 11, when idler wheel 2121 is using one section
Between circumference surface wear, so that idler wheel 2121 is rolled into 3 upper surface of positioning plate, when cabinet door 11 is also switched off not tight, rotational lead screw 21 will be rolled
Wheel 2121 lower, idler wheel 2121 just can continue to using, improve the service life of idler wheel 2121, when use idler wheel 2121 need
When replacing, the nut of bolt one end is unscrewed and is disassembled, after the idler wheel 2121 more renewed, tightens nut.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but
As long as all by the protection of Patent Law in the scope of the claims of the utility model.
Claims (8)
1. a kind of switchgear with convenient for stablizing the support construction of cabinet door, including cabinet body (1) and cabinet door (11), cabinet door
(11) vertical hinged with cabinet body (1), it is characterised in that: the cabinet body (1) includes crossbeam (12), and the upper end of crossbeam (12) is fixed with
One horizontal positioning plate (3), the upper surface of positioning plate (3) offer a horizontal guiding groove (31), guiding groove (31) with
In parallel, sliding rail (32) are arranged in the lower section of guiding groove (31) to crossbeam (12), and sliding rail (32) is fixedly connected with cabinet body (1), sliding rail (32)
Bottom offer multiple location holes (321), location hole (321) is uniformly distributed along the length direction of sliding rail (32), cabinet door
(11) it is fixedly connected on the inside of fixed link (111), fixed link (111) is hinged with a horizontal connecting rod (1111), connecting rod
(1111) the other end is provided with the vertical positioning pin of central axis (4), and the bottom end of positioning pin (4) is adapted with sliding slot, fixed
Position pin (4) includes left half pin (41) and right half pin (42), left half pin (41) and right half pin (42) articulated connection, it is left partly sell (41) and
The bottom of right half pin (42) has been respectively articulated with half sliding block of a left side (411) and right half sliding block (421), and left half sliding block (411) and right half are slided
It is fixedly connected between block (421) horizontal spring (5), when spring nature, half sliding block of left half sliding block (411) and the right side
(421) distance far from spring two sides is greater than location hole (321) along the width of guiding groove (31) length direction, and spring is compressed
When, the distance of left half sliding block (411) and the separate spring two sides of right half sliding block (421) is less than location hole (321) along guiding groove (31)
The width of length direction.
2. a kind of switchgear with convenient for stablizing the support construction of cabinet door according to claim 1, it is characterised in that: institute
Left half pin (41) and right half is stated to sell and be fixedly connected with adjustment portion (6) at the top of (42), straight up the distance between adjustment portion (6) by
Gradual change is big.
3. a kind of switchgear with convenient for stablizing the support construction of cabinet door according to claim 1, it is characterised in that: institute
The hinge joint upper and lower position for stating left half pin (41) and right half pin (42) is arranged with cylinder (7), and left half pin (41) is interior with cylinder (7)
Wall articulated connection.
4. a kind of switchgear with convenient for stablizing the support construction of cabinet door according to claim 1, it is characterised in that: institute
The bottom for stating left half sliding block (411) is fixedly connected with support plate (4111), and support plate (4111) is from the bottom of left half sliding block (411)
Extend to the bottom for just contacting right half sliding block (421).
5. a kind of switchgear with convenient for stablizing the support construction of cabinet door according to claim 1, it is characterised in that: institute
It states spring (5) and is provided with multiple, and multiple springs (5) are uniformly distributed between left half sliding block (411) and half sliding block of the right side (421).
6. a kind of switchgear with convenient for stablizing the support construction of cabinet door according to claim 1, it is characterised in that: institute
It states right half sliding block (421) to be fixedly connected with horizontal guiding bar (4211), guiding bar (4211) and left half sliding block (411) are slided and connected
It connects, what guiding bar (4211) was parallel to guiding groove (31) opens up direction.
7. a kind of switchgear with convenient for stablizing the support construction of cabinet door according to claim 6, it is characterised in that: institute
It states there are two guiding bar (4211) settings, and two guiding bars (4211) are diagonally positioned up and down.
8. a kind of switchgear with convenient for stablizing the support construction of cabinet door according to claim 1, it is characterised in that: institute
The inner wall for stating location hole (321) is fixedly connected with cushion rubber layer (3211).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920080168.6U CN209526375U (en) | 2019-01-17 | 2019-01-17 | A kind of switchgear with convenient for stablizing the support construction of cabinet door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920080168.6U CN209526375U (en) | 2019-01-17 | 2019-01-17 | A kind of switchgear with convenient for stablizing the support construction of cabinet door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209526375U true CN209526375U (en) | 2019-10-22 |
Family
ID=68229466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920080168.6U Expired - Fee Related CN209526375U (en) | 2019-01-17 | 2019-01-17 | A kind of switchgear with convenient for stablizing the support construction of cabinet door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209526375U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113970036A (en) * | 2021-10-21 | 2022-01-25 | 刘俊岗 | Online education projection system based on e-commerce learning and using method thereof |
-
2019
- 2019-01-17 CN CN201920080168.6U patent/CN209526375U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113970036A (en) * | 2021-10-21 | 2022-01-25 | 刘俊岗 | Online education projection system based on e-commerce learning and using method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191022 Termination date: 20220117 |