CN105365449A - Adjustable chalk sleeve with hand protection function - Google Patents
Adjustable chalk sleeve with hand protection function Download PDFInfo
- Publication number
- CN105365449A CN105365449A CN201510798475.4A CN201510798475A CN105365449A CN 105365449 A CN105365449 A CN 105365449A CN 201510798475 A CN201510798475 A CN 201510798475A CN 105365449 A CN105365449 A CN 105365449A
- Authority
- CN
- China
- Prior art keywords
- chalk
- hole
- clamping device
- flexible sheath
- tubular flexible
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K24/00—Mechanisms for selecting, projecting, retracting or locking writing units
- B43K24/02—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions
- B43K24/08—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by push-buttons
- B43K24/088—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by push-buttons with spreading spring means
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The invention discloses an adjustable chalk sleeve with a hand protection function. The adjustable chalk sleeve with the hand protection function comprises a cylindrical elastic jacket (2) made of a soft rubber material. A plurality of evenly-distributed annular thin metal sheets are vulcanized inside the cylindrical elastic jacket (2). An elastic clamping device (3) is fixed to one end of a through hole in the cylindrical elastic jacket (2). An adjustment device (5) used for adjusting the elastic clamping device (3) is further arranged on the outer side of the elastic clamping device (3). A reset spring (4) used for restoring the adjustment device (5) is further arranged between the adjustment device (5) and the elastic clamping device (3). A rigid conical protective head (21) is further arranged at the other end of the through hole in the cylindrical elastic jacket (2). An installation hole communicated with the through hole is formed in the middle of the rigid conical protective head (21). According to the adjustable chalk sleeve with the hand protection function, chalk is prevented from making direct contact with people, the annular thin metal sheets can prevent the chalk in the chalk sleeve from being broken, and thus both the chalk and people are protected.
Description
Technical field
The present invention relates to a kind of teaching aid, belong to field of Education and teaching, specifically a kind of adjustable hand protecting chalk holder.
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.
Summary of the invention
Problem to be solved by this invention is to provide a kind of adjustable hand protecting chalk holder, thus solves the inconvenience of chalk use in the past, the easy problem damaging instructor and very easily fracture.
Based on above object, technical scheme provided by the invention is:
A kind of adjustable hand protecting chalk holder, comprise the tubular flexible sheath be made up of flexible glue material, the inner sulfuration of tubular flexible sheath has multiple equally distributed annular foil, interior side through hole one end of described tubular flexible sheath is fixed with spring clamping device, the adjusting device for adjustable elastic gripping mechanism is also provided with outside spring clamping device, 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.
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, annular gland end face is provided with push rod, described back-moving spring is linked on push rod, adjustment hole is provided with 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.
One end that described tubular flexible sheath lateral surface is positioned at rigidity taper head protector is provided with hatching knurling.
Compared to prior art, the invention has the advantages that:
1, 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.
2, 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.
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 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 foil; 23, hatching knurling; 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.
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 adjustable hand protecting chalk holder as described in Fig. 1-Fig. 2, comprise the tubular flexible sheath 2 be made up of flexible glue material, the inner sulfuration of tubular flexible sheath 2 has multiple equally distributed annular foil 22, interior side through hole one end of described tubular flexible sheath 2 is fixed with spring clamping device 3, the adjusting device 5 for adjustable elastic gripping mechanism 3 is also provided with outside spring clamping device 3, the back-moving spring 4 for the adjusting device 5 that resets also is 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, the installing hole be communicated with through hole is provided with in the middle part of rigidity taper head protector 21.
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, simultaneously hand-protecting chalk sleeve flexible touch is good, does not affect the normal use of chalk, and annular foil 22 can the intensity of reinforced sheath, play the effect of protection chalk, avoid chalk 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.
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
As shown in Figure 3, the present embodiment optimizes spring clamping device on the basis of embodiment 1, 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 3
The present embodiment optimizes adjusting device on the basis of embodiment 2, be specially: described adjusting device 5 comprises annular gland 53, 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, extruding annular gland 53, it is made to move axially along side through hole in tubular flexible sheath 2, when push rod 51 moves and annular roof plate 32, and force three elastic clips 33 outwards to be opened by annular roof plate 32, thus unclamp chalk 1, after having regulated, unclamp annular gland 53, 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 4
The present embodiment has done following optimization on the basis of embodiment 2 or embodiment 3: 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: one end that described tubular flexible sheath 2 lateral surface is positioned at rigidity taper head protector 21 is provided with hatching knurling 23.
The present embodiment is in order to improve the feel of sheath, and convenient when instructor is used, the one end being positioned at rigidity taper head protector 21 at tubular flexible sheath 2 lateral surface arranges hatching knurling 23, thus improves the friction of sheath and hand by hatching knurling 23, prevents sheath from rotating.
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 (6)
1. an adjustable hand protecting chalk holder, it is characterized in that: comprise the tubular flexible sheath (2) be made up of flexible glue material, tubular flexible sheath (2) inner sulfuration has multiple equally distributed annular foil (22), interior side through hole one end of described tubular flexible sheath (2) is fixed with spring clamping device (3), spring clamping device (3) outside is also provided with the adjusting device (5) for adjustable elastic gripping mechanism (3), 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.
2. adjustable hand protecting chalk holder 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).
3. adjustable hand protecting chalk holder according to claim 2, it is characterized in that: described adjusting device (5) comprises annular gland (53), 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).
4. adjustable hand protecting chalk holder according to claim 3, is characterized in that: described push rod (51) is provided with snap ring (52).
5. adjustable hand protecting chalk holder according to claim 2, is characterized in that: the cross section of described elastic clip (33) is sector structure.
6. adjustable hand protecting chalk holder according to claim 1, is characterized in that: one end that described tubular flexible sheath (2) lateral surface is positioned at rigidity taper head protector (21) is provided with hatching knurling (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510798475.4A CN105365449A (en) | 2015-11-19 | 2015-11-19 | Adjustable chalk sleeve with hand protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510798475.4A CN105365449A (en) | 2015-11-19 | 2015-11-19 | Adjustable chalk sleeve with hand protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105365449A true CN105365449A (en) | 2016-03-02 |
Family
ID=55368304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510798475.4A Pending CN105365449A (en) | 2015-11-19 | 2015-11-19 | Adjustable chalk sleeve with hand protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105365449A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2070249U (en) * | 1990-06-01 | 1991-01-30 | 徐中宾 | Convenient chalk holder |
| CN2363890Y (en) * | 1999-04-15 | 2000-02-16 | 勾自强 | Wooden nib holder |
| US6793429B2 (en) * | 2000-07-26 | 2004-09-21 | William Q. Arrison | Chalk holding device |
| CN104175754A (en) * | 2014-06-23 | 2014-12-03 | 黄志宽 | Chalk holder |
-
2015
- 2015-11-19 CN CN201510798475.4A patent/CN105365449A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2070249U (en) * | 1990-06-01 | 1991-01-30 | 徐中宾 | Convenient chalk holder |
| CN2363890Y (en) * | 1999-04-15 | 2000-02-16 | 勾自强 | Wooden nib holder |
| US6793429B2 (en) * | 2000-07-26 | 2004-09-21 | William Q. Arrison | Chalk holding device |
| CN104175754A (en) * | 2014-06-23 | 2014-12-03 | 黄志宽 | Chalk holder |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160302 |
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| RJ01 | Rejection of invention patent application after publication |