CN105459677A - Heating type hand guard chalk sleeve - Google Patents
Heating type hand guard chalk sleeve Download PDFInfo
- Publication number
- CN105459677A CN105459677A CN201510798431.1A CN201510798431A CN105459677A CN 105459677 A CN105459677 A CN 105459677A CN 201510798431 A CN201510798431 A CN 201510798431A CN 105459677 A CN105459677 A CN 105459677A
- Authority
- CN
- China
- Prior art keywords
- flexible sheath
- annular
- tubular flexible
- chalk
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
- B43K23/016—Holders for crayons or chalks
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- Clamps And Clips (AREA)
Abstract
The invention discloses a heating type hand guard chalk sleeve which comprises a cylindrical elastic protection sleeve. Annular thin metal resistor discs are vulcanized in the cylindrical elastic protection sleeve and communicated through wires. A battery switch assembly is fixed to one end of a through hole in the inner side of the cylindrical elastic protection sleeve and connected with the wires to form an electric circuit. An elastic clamping device is fixed to the cylindrical elastic protection sleeve and provided with an adjusting device. The adjusting device is provided with a reset spring. The cylindrical elastic protection sleeve is provided with a rigid conical protection head. The cylindrical elastic protection sleeve is further provided with a fixing device. The annular thin metal resistor discs are arranged and can be powered on for heating, and therefore the cylindrical elastic protection sleeve can be in a warm state; it is guaranteed that when the heating type hand guard chalk sleeve is used in the cold environment, the hands of a teacher can be protected against cold injuries; the comfort level during use is increased; the health of the hands of the teacher is guaranteed; and protection performance is good.
Description
Technical field
The present invention relates to a kind of teaching aid, belong to field of Education and teaching, specifically a kind of hot type hand-protecting chalk sleeve.
Background technology
The chalk teaching of handwriting is adopted to be traditional teaching method, nowadays the blackboard chalk teaching of handwriting is adopted progressively to be eliminated by multimedia teaching, but, in some primary schools, junior-senior high school or some small towns, small city and poverty-stricken area, due to the restriction of condition, chalk still can only be used to write and to impart knowledge to students.
When using chalk teaching, instructor directly takes chalk to write, not only hand is stained with chalk dust, skin is damaged, and in the winter time or cold snap, chalk is ice-cold, and instructor in use hand catches a cold very easily freezing, and if things go on like this also can get chilblains, the numbness of fingers etc., be unfavorable for that instructor's is healthy; Meanwhile, chalk also very easily fractures in use, cannot normally use after fractureing, and is all generally directly to lose to give up, and this brings cost also to the use of chalk.
In present chalk sleeve, when chalk is too short, chalk sleeve diminishes to its chucking power, and chalk cannot normally clamp fixing in use, cannot use equally, reduces costs there is no substantial effect to saving chalk.Meanwhile, at low-temperature cold weather or some cold districts, instructor is outside when imparting knowledge to students, hand is exposed to, very ice-cold after finger holds a pen, very easily pernio or occur numb, affect hand health.
Summary of the invention
Problem to be solved by this invention is to provide a kind of hot type hand-protecting chalk sleeve, thus it is ice-cold after holding a pen to solve instructor's finger in the past, affects the problem of hand health.
Based on above object, technical scheme provided by the invention is:
A kind of hot type hand-protecting chalk sleeve, comprise the tubular flexible sheath be made up of insulation flexible glue material, the inner sulfuration of tubular flexible sheath has the thin metallic resistance sheet of multiple equally distributed annular, the thin metallic resistance sheet of annular is communicated with each other by wire, interior side through hole one end end winding support of described tubular flexible sheath has cell switch assembly, cell switch assembly and wire are connected to form electricity consumption loop, the interior side through hole of described tubular flexible sheath is also fixed with spring clamping device, the adjusting device for adjustable elastic gripping mechanism is also provided with between spring clamping device and cell switch assembly, the back-moving spring for the adjusting device that resets also is provided with between adjusting device and spring clamping device, the interior side through hole other end of described tubular flexible sheath is also provided with rigidity taper head protector, the installing hole be communicated with through hole is provided with in the middle part of rigidity taper head protector, the side that described tubular flexible sheath is positioned at rigidity taper head protector one end is also provided with fixture, fixture comprises adjustment fixture block and torsion spring, torsion spring is arranged on the interior side through hole of tubular flexible sheath and one end of torsion spring is fixed on through hole inside, described adjustment fixture block is connected with connecting rod, connecting rod is connected with the other end of torsion spring through after tubular flexible sheath, the groove of annular is also provided with outside described tubular flexible sheath, groove both sides are provided with positioning step, positioning step side is provided with screw thread, described adjustment fixture block is positioned at groove, and regulate fixture block side to be arranged to the flank coordinated with positioning step flank threads, form the secured adjusted structure regulating fixture block along groove circular-rotation, the gap of described connecting rod between adjustment fixture block and groove is also sheathed with coil tension spring.
Described cell switch assembly comprises battery tray, is provided with button cell in battery tray, and button cell arranged outside has spring push-button switch, and the thin metallic resistance sheet of described annular, wire, button cell and spring push-button switch entirety forms electricity consumption loop.
Described spring clamping device comprises the ring-type fixing plate being fixed on through-hole wall inside tubular flexible sheath, ring-type fixing plate end face has been circularly and evenly distributed three elastic clips, also be connected with annular roof plate respectively by connecting plate between three elastic clips, annular roof plate overlaps with the axis of ring-type fixing plate.
Described adjusting device comprises annular gland, and annular gland side is provided with shifting block, and shifting block stretches out tubular flexible sheath, and described shifting block can drive annular gland along tubular flexible sheath axial translation; Described annular gland end face is provided with push rod, described back-moving spring is linked on push rod, be provided with adjustment hole in the middle part of described ring-type fixing plate, described push rod can extrude annular roof plate through after adjustment hole, drives three elastic clip clampings or unclamp by extruding annular roof plate.
Described push rod is provided with snap ring.
The cross section of described elastic clip is sector structure.
Described torsion spring medial surface is also provided with one deck cotton cushion course.
Compared to prior art, the invention has the advantages that:
1, the present invention arranges annular thin metallic resistance sheet, and energising can be heated, thus tubular flexible sheath can be made to be in tepid state; ensure that instructor's hand can avoid frostbite when cold environment uses, improve comfort level when using; ensure the health of instructor's hand, protectiveness is good.
2, tubular flexible sheath softness of the present invention is flexible; the sense of touch of instructor's hand and chalk can be increased; easy to use; avoid chalk directly to contact with people; simultaneously tubular flexible sheath adds annular foil and gains in strength; make it not yielding, annular foil can also prevent the inner chalk that fractures, thus is all protected people and chalk.
3, chalk can clamp by spring clamping device of the present invention, and can control the folding of clamping according to adjusting device, thus not only chalk can be clamped, simultaneously also can by extrapolated for inner chalk, to ensure that chalk can stretch out after shortening in writing process in time.
4, fixture of the present invention can at spring clamping device because inner chalk be too short, chalk is fixed when clamping force diminishes, thus can use fixing for chalk too short for length, reduce the waste to chalk, do not think in use normally to write simultaneously yet, also easy to use while cost-saving.
Accompanying drawing explanation
Fig. 1 is cross-sectional view of the present invention.
Fig. 2 is STRUCTURE DECOMPOSITION schematic diagram of the present invention.
Fig. 3 is the structure enlarged diagram that in Fig. 1, A goes out.
Fig. 4 is the structural representation of spring clamping device of the present invention.
Label in figure is expressed as: 1, chalk; 2, tubular flexible sheath; 21, rigidity taper head protector; 22, annular thin metallic resistance sheet; 23, wire; 24, fixture; 241, positioning step; 242, groove; 243, connecting rod; 244, fixture block is regulated; 245, coil tension spring; 246, torsion spring; 247, cotton cushion course; 3, spring clamping device; 31, connecting plate; 32, annular roof plate; 33, elastic clip; 34, ring-type fixing plate; 4, back-moving spring; 5, adjusting device; 51, push rod; 52, snap ring; 53, annular gland; 54, shifting block; 6, cell switch assembly; 61, button cell; 62, battery tray; 63, spring push-button switch.
Detailed description of the invention
In order to make those skilled in the art understand the present invention better, below in conjunction with the embodiment of the present invention and accompanying drawing, clear, complete explanation is carried out to technical scheme of the present invention.
Embodiment 1
A kind of hot type hand-protecting chalk sleeve as described in Fig. 1-Fig. 3, comprise the tubular flexible sheath 2 be made up of insulation flexible glue material, the inner sulfuration of tubular flexible sheath 2 has the thin metallic resistance sheet 22 of multiple equally distributed annular, the thin metallic resistance sheet 22 of annular is communicated with each other by wire 23, interior side through hole one end end winding support of described tubular flexible sheath 2 has cell switch assembly 6, cell switch assembly 6 and wire 23 are connected to form electricity consumption loop, the interior side through hole of described tubular flexible sheath 2 is also fixed with spring clamping device 3, the adjusting device 5 for adjustable elastic gripping mechanism 3 is also provided with between spring clamping device 3 and cell switch assembly 6, adjusting device 5) and spring clamping device 3 between be also provided with back-moving spring 4 for the adjusting device 5 that resets, the interior side through hole other end of described tubular flexible sheath 2 is also provided with rigidity taper head protector 21, the installing hole be communicated with through hole is provided with in the middle part of rigidity taper head protector 21, the side that described tubular flexible sheath 2 is positioned at rigidity taper head protector 21 one end is also provided with fixture 24, fixture 24 comprises adjustment fixture block 244 and torsion spring 246, torsion spring 246 is arranged on the interior side through hole of tubular flexible sheath 2 and one end of torsion spring 246 is fixed on through hole inside, described adjustment fixture block 244 is connected with connecting rod 243, connecting rod 243 is connected with the other end of torsion spring 246 through after tubular flexible sheath 2, the groove 242 of annular is also provided with outside described tubular flexible sheath 2, groove 242 both sides are provided with positioning step 241, positioning step 241 side is provided with screw thread, described adjustment fixture block 244 is positioned at groove 242, and regulate fixture block 244 side to be arranged to the flank coordinated with positioning step 241 flank threads, form the secured adjusted structure regulating fixture block 244 along groove 242 circular-rotation, the gap of described connecting rod 243 between adjustment fixture block 244 and groove 242 is also sheathed with coil tension spring 245.
In the present embodiment, it is inner that chalk 1 stretches into tubular flexible sheath 2 by the installing hole of rigidity taper head protector 21 one end, and clamped by spring clamping device 3, chalk can be used to write, during use, instructor's hand does not contact with chalk, avoid the injury that chalk dust causes hand, hand-protecting chalk sleeve flexible touch is good simultaneously, do not affect the normal use of chalk, the thin metallic resistance sheet 22 of annular can the intensity of reinforced sheath, play the effect of protection chalk, chalk is avoided to fracture, also can play moulding effect simultaneously, tubular flexible sheath 2 is used for a long time and indeformable, when chalk front end shortening because writing, also controlling spring clamping device 3 by adjusting device 5 and cancelling clamping, thus chalk is extrapolated, regulate the chalk length stretched out, ensure normally to write, very convenient.
The thin metallic resistance sheet 22 of annular of the present embodiment is communicated with by wire 23; and powered by cell switch assembly 6; when instructor is in cold environment teaching; electricity consumption loop can be connected; thin metallic resistance sheet 22 heating power of annular, thus whole tubular flexible sheath 2 is generated heat, would not feel cold when instructor holds; finger there will not be ice-cold sharp sensation, the hand safety of the instructor of fabulous protection.
In the present embodiment, when the length that chalk 1 is positioned at tubular flexible sheath 2 inside is too short, spring clamping device 3 reduces its clamping force, clamping weak effect, chalk is very easily to the inner indentation of tubular flexible sheath 2 in use, impact is normal to be used, therefore, the side that the present embodiment is positioned at rigidity taper head protector 21 one end at tubular flexible sheath 2 arranges fixture 24, when chalk 1 is too short there is indentation time, can compress and regulate fixture block 244, it is made to press down to groove 242 inside, the screw thread of fixture block 244 and positioning step 241 is now regulated to stagger, fixture block 244 will be regulated along groove 242 circular-rotation, connecting rod 243 drives torsion spring 246 to shrink, thus the chalk 1 between clamping torsion spring 246, after chalk 1 is fixing, unclamp and regulate fixture block 244, fixture block 244 is regulated to eject outside groove 242 under coil tension spring 245 acts on, after adjustment fixture block 244 clamps with positioning step 241 threaded engagement, fixture block 244 is regulated to fix, now chalk 1 clamps, can normally use, when needs regulate chalk extension elongation, press down and regulate fixture block 244 and make it rotate backward along groove 242 circumference, torsion spring 246 degree of tightness, chalk 1 is in active state, can regulate.Fixture 24 structure of the present embodiment is simple, easy to use, can well be clamped by chalk too short for length, meets normal use.
In the present embodiment, rigidity taper head protector 21 can increase tubular flexible sheath 2 front end to the holding area of chalk 1, thus can increase the chucking power of chalk 1, avoiding the chalk front end when writing to fracture, playing a very good protection.
Also reset by the effect of back-moving spring 4 elastic force after adjusting device 5 regulates in the present embodiment, thus reuse, facilitate instructor to release the chalk of appropriate length, easy to use.
Embodiment 2
The present embodiment optimizes cell switch assembly on the basis of embodiment 1, be specially: described cell switch assembly 6 comprises battery tray 62, button cell 61 is provided with in battery tray 62, button cell 61 arranged outside has spring push-button switch 63, and the thin metallic resistance sheet 22 of described annular, wire 32, button cell 61 and spring push-button switch 63 entirety forms electricity consumption loop.
The battery tray 62 of the present embodiment is arranged by fixed or detachable manner, and spring push-button switch 63 can control the break-make in electricity consumption loop.When needed, spring push-button switch 63 can be pressed, make electricity consumption circuit communication, now annular thin metallic resistance sheet 22 electrified regulation, improve tubular flexible sheath 2 temperature.
Embodiment 3
As shown in Figure 4, the present embodiment optimizes spring clamping device on the basis of embodiment 1 or embodiment 2, be specially: described spring clamping device 3 comprises the ring-type fixing plate 34 being fixed on through-hole wall inside tubular flexible sheath 2, ring-type fixing plate 34 end face has been circularly and evenly distributed three elastic clips 33, also be connected with annular roof plate 32 respectively by connecting plate 31 between three elastic clips 33, annular roof plate 32 overlaps with the axis of ring-type fixing plate 34.
In the present embodiment, chalk 1 is clamped between three elastic clips 33, when external part is too short need release chalk 1 carry out supplementary time, be pressed on annular roof plate 32 by adjusting device 5, annular roof plate 32 advances to chalk 1 direction, now annular roof plate 32 forces three elastic clips 33 outwards to be opened by connecting plate 31, thus unclamp chalk 1, chalk 1 pulls out with hand by instructor, or directly vertically place overall for sheath, by gravity, chalk 1 is pulled out, adjusting device 5 is unclamped in time stretching out correct position, three elastic clips 33 resile and clamp chalk 1, again fix chalk 1.
Spring clamping device 3 structure of the present embodiment is simple, easy to operate, can clamp easily or unclamp chalk 1, the convenient use length regulating chalk.
Embodiment 4
The present embodiment optimizes adjusting device on the basis of embodiment 3, be specially: described adjusting device 5 comprises annular gland 53, annular gland 53 side is provided with shifting block 54, and shifting block 54 stretches out tubular flexible sheath 2, and described shifting block 54 can drive annular gland 53 along tubular flexible sheath 2 axial translation; Described annular gland 53 end face is provided with push rod 51, described back-moving spring 4 is linked on push rod 51, adjustment hole 35 is provided with in the middle part of described ring-type fixing plate 34, described push rod 51 can extrude annular roof plate 32 through after adjustment hole 35, drives three elastic clips 33 clamp or unclamp by extruding annular roof plate 32.
The annular gland 53 of the present embodiment is arranged on spring clamping device 3 outer end, its push rod 51 can extrude annular roof plate 32 through after adjustment hole 35, when needs regulate chalk 1 length, annular gland 53 is driven to move axially to spring clamping device 3 by shifting block 54, contact with annular roof plate 32 when push rod 51 moves, and force three elastic clips 33 outwards to be opened by annular roof plate 32, thus unclamp chalk 1, after having regulated, unclamp shifting block 54, back-moving spring 4 makes annular gland 53 reset under elastic force effect, now chalk clamps by three elastic clips 33 again, complete adjustment.Adjusting device 5 structure of the present embodiment is simple, and convenient to operation, can regulate by continuous print, can not destroy sheath and chalk, practicality is good.
As preferably, described push rod 51 is provided with snap ring 52.Snap ring 52 is stuck between ring-type fixing plate 34 and annular roof plate 32, thus can prevent annular gland 53 from ejecting under the effect of back-moving spring 4 elastic force, plays and well clamps effect.
Embodiment 5
The present embodiment has done following optimization on the basis of embodiment 3 or embodiment 4: the cross section of described elastic clip 33 is sector structure.
The cross section of the present embodiment elastic clip 33 is sector structure, and the comparatively small end face of sector structure is arc structure, and it is can fit completely with chalk 1 surface at clamping chalk 1, thus clamping chalk 1 that can be firm, prevent it from sliding, clamp effective.
Embodiment 5
The present embodiment has done following optimization on the basis of above-mentioned any embodiment: described torsion spring 246 medial surface is also provided with one deck cotton cushion course 247.
The present embodiment in order to avoid when fixing chalk 1 torsion spring 246 pairs of chalks damage and the chalk 1 that fractures; spy arranges one deck cotton cushion course 247 at torsion spring 246 medial surface; cotton cushion course 237 can reduce the local stress of torsion spring 246 pairs of chalks 1, reduces compressing, thus protection chalk 1.
Well can realize the present invention as mentioned above.Scope of patent protection of the present invention is as the criterion with claims, the equivalent structure change that every utilization description of the present invention and accompanying drawing content are done, and in like manner all should be included in protection scope of the present invention.
Claims (7)
1. a hot type hand-protecting chalk sleeve, it is characterized in that: comprise the tubular flexible sheath (2) be made up of insulation flexible glue material, tubular flexible sheath (2) inner sulfuration has the thin metallic resistance sheet (22) of multiple equally distributed annular, the thin metallic resistance sheet (22) of annular is communicated with each other by wire (23), interior side through hole one end end winding support of described tubular flexible sheath (2) has cell switch assembly (6), cell switch assembly (6) and wire (23) are connected to form electricity consumption loop, the interior side through hole of described tubular flexible sheath (2) is also fixed with spring clamping device (3), the adjusting device (5) for adjustable elastic gripping mechanism (3) is also provided with between spring clamping device (3) and cell switch assembly (6), the back-moving spring (4) for the adjusting device that resets (5) is also provided with between adjusting device (5) and spring clamping device (3), the interior side through hole other end of described tubular flexible sheath (2) is also provided with rigidity taper head protector (21), rigidity taper head protector (21) middle part is provided with the installing hole be communicated with through hole, the side that described tubular flexible sheath (2) is positioned at rigidity taper head protector (21) one end is also provided with fixture (24), fixture (24) comprises adjustment fixture block (244) and torsion spring (246), torsion spring (246) is arranged on the interior side through hole of tubular flexible sheath (2) and one end of torsion spring (246) is fixed on through hole inside, described adjustment fixture block (244) is connected with connecting rod (243), connecting rod (243) is connected with the other end of torsion spring (246) afterwards through tubular flexible sheath (2), described tubular flexible sheath (2) outside is also provided with the groove (242) of annular, groove (242) both sides are provided with positioning step (241), positioning step (241) side is provided with screw thread, described adjustment fixture block (244) is positioned at groove (242), and regulate fixture block (244) side to be arranged to the flank coordinated with positioning step (241) flank threads, form the secured adjusted structure regulating fixture block (244) along groove (242) circular-rotation, described connecting rod (243) is positioned at and regulates the gap between fixture block (244) and groove (242) to be also sheathed with coil tension spring (245).
2. a kind of hot type hand-protecting chalk sleeve according to claim 1, it is characterized in that: described cell switch assembly (6) comprises battery tray (62), button cell (61) is provided with in battery tray (62), button cell (61) arranged outside has spring push-button switch (63), and the thin metallic resistance sheet (22) of described annular, wire (32), button cell (61) and spring push-button switch (63) entirety form electricity consumption loop.
3. a kind of hot type hand-protecting chalk sleeve according to claim 1, it is characterized in that: described spring clamping device (3) comprises the ring-type fixing plate (34) being fixed on tubular flexible sheath (2) inner side through-hole wall, ring-type fixing plate (34) end face has been circularly and evenly distributed three elastic clips (33), also be connected with annular roof plate (32) respectively by connecting plate (31) between three elastic clips (33), annular roof plate (32) overlaps with the axis of ring-type fixing plate (34).
4. a kind of hot type hand-protecting chalk sleeve according to claim 3, it is characterized in that: described adjusting device (5) comprises annular gland (53), annular gland (53) side is provided with shifting block (54), shifting block (54) stretches out tubular flexible sheath (2), and described shifting block (54) can drive annular gland (53) along tubular flexible sheath (2) axial translation; Described annular gland (53) end face is provided with push rod (51), described back-moving spring (4) is linked on push rod (51), described ring-type fixing plate (34) middle part is provided with adjustment hole (35), described push rod (51) can extrude annular roof plate (32) through after adjustment hole (35), drives three elastic clips (33) clamp or unclamp by extruding annular roof plate (32).
5. a kind of hot type hand-protecting chalk sleeve according to claim 4, is characterized in that: described push rod (51) is provided with snap ring (52).
6. a kind of hot type hand-protecting chalk sleeve according to claim 3, is characterized in that: the cross section of described elastic clip (33) is sector structure.
7. a kind of hot type hand-protecting chalk sleeve according to claim 1, is characterized in that: described torsion spring (246) medial surface is also provided with one deck cotton cushion course (247).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510798431.1A CN105459677A (en) | 2015-11-19 | 2015-11-19 | Heating type hand guard chalk sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510798431.1A CN105459677A (en) | 2015-11-19 | 2015-11-19 | Heating type hand guard chalk sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105459677A true CN105459677A (en) | 2016-04-06 |
Family
ID=55598013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510798431.1A Pending CN105459677A (en) | 2015-11-19 | 2015-11-19 | Heating type hand guard chalk sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105459677A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108725085A (en) * | 2018-07-16 | 2018-11-02 | 宁德职业技术学院 | A kind of carbon item drawing holder of industrial art |
| CN109228737A (en) * | 2018-09-11 | 2019-01-18 | 安徽潜源教学设备有限公司 | A kind of chalk clip for teaching |
| CN109619827A (en) * | 2018-12-03 | 2019-04-16 | 安徽农业大学 | A kind of multifunctional artistic design integral table |
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| CN204037145U (en) * | 2014-08-28 | 2014-12-24 | 朱博瀚 | One is anti-hinders hand propelling chalk sleeve |
| CN204547449U (en) * | 2015-04-16 | 2015-08-12 | 芦晓珂 | One regulates chalk sleeve automatically |
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| CN2070249U (en) * | 1990-06-01 | 1991-01-30 | 徐中宾 | Convenient chalk holder |
| CN2155309Y (en) * | 1993-03-03 | 1994-02-09 | 车沂南 | Chalk holder |
| JPH07285291A (en) * | 1994-04-18 | 1995-10-31 | Mitsubishi Pencil Co Ltd | Tool for letting out core |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108725085A (en) * | 2018-07-16 | 2018-11-02 | 宁德职业技术学院 | A kind of carbon item drawing holder of industrial art |
| CN108725085B (en) * | 2018-07-16 | 2023-12-05 | 宁德职业技术学院 | Carbon rod drawing holder for arts and crafts |
| CN109228737A (en) * | 2018-09-11 | 2019-01-18 | 安徽潜源教学设备有限公司 | A kind of chalk clip for teaching |
| CN109619827A (en) * | 2018-12-03 | 2019-04-16 | 安徽农业大学 | A kind of multifunctional artistic design integral table |
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| PB01 | Publication | ||
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Application publication date: 20160406 |
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