CN202950221U - Desk top expanding book bracket - Google Patents
Desk top expanding book bracket Download PDFInfo
- Publication number
- CN202950221U CN202950221U CN 201220490112 CN201220490112U CN202950221U CN 202950221 U CN202950221 U CN 202950221U CN 201220490112 CN201220490112 CN 201220490112 CN 201220490112 U CN201220490112 U CN 201220490112U CN 202950221 U CN202950221 U CN 202950221U
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- CN
- China
- Prior art keywords
- rod
- connecting rod
- driven friction
- friction disk
- friction disc
- 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.)
- Expired - Fee Related
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Abstract
The utility model provides a desk top expanding book bracket and belongs to the technical field of teaching apparatus. The desk top expanding book bracket structurally comprises a desk edge clip and a book bracket body. One side of the desk edge clip is provided with a cross rod and a connecting piece. A vertical rod is arranged on the connecting piece through a baffle ring seat. The top end of the vertical rod is provided with a supporting rod. One end of the supporting rod is provided with a left fixed friction disc in a connecting mode. Two ends of a connecting rod are provided with a left driven friction disc and a right driven friction disc. The connecting rod is connected with a left threaded rod in a penetrating mode through the left driven friction disc. A right fixed friction disc is arranged on the bottom portion of the book bracket. The center of the right fixed friction disc is provided with a right threaded rod. The other end of the connecting rod is connected on the right threaded rod in a penetrating mode through the right driven friction disc. The left threaded rod and the right threaded rod which are connected on the connecting rod in a penetrating mode are respectively provided with a left tight nut and a right tight nut. The frictions discs are screwed through the tight nuts to achieve fixation of a connecting rod angle, and therefore the fact that the book bracket can be stably rested at a position suitable for reading is guaranteed. Therefore, a teacher can release two hands and teaching quality is improved.
Description
Technical field
The utility model relates to the teaching appliance technical field, and specifically a kind of desktop is expanded type rack for books.
Background technology
General, the teaching material the when teacher gives lessons at the dais keeps flat on the table, and the teacher often can bow to consult bookish content frequently in the teaching process, bows frequently or bows for a long time and cause easily the tired and damage of teacher's cervical vertebra.Yet the teacher is held in the hand mode of lifting in the front to book, although alleviated the fatigue of cervical vertebra, but has increased the fatigue of arm and wrist, and of long duration feeling more ached.How a kind of type rack for books based on lectern of Design and manufacture is an important topic of physical fatigue when solving teachers' instruction.
Summary of the invention
Technical assignment of the present utility model is to solve the deficiencies in the prior art, provides a kind of desktop to expand type rack for books.
The technical solution of the utility model realizes in the following manner, this desktop is expanded type rack for books, its structure comprises limit folder and a type rack for books, be provided with butterfly bolt on the folder of table limit, the table limit presss from both sides a side and is provided with cross bar, and cross-under has connector on the cross bar, be provided with montant seat hole on the connector, be provided with baffle ring on the montant shaft, the baffle ring diameter is greater than montant seat bore dia, and montant is located on the connector by the baffle ring seat; The montant top is provided with support bar, support bar one end is connected with left fixed friction dish, left fixed friction disk center is provided with left screw rod, the connecting rod left end is provided with left driven friction disk, the other end is provided with right driven friction disk, left driven friction disk and right driven friction disk center all offer the dish hole, the dish bore dia greater than left screw diameter and less than left fixed friction dish diameter, connecting rod by left driven friction disk cross-under on left screw rod; The type rack for books bottom is provided with right fixed friction dish, right fixed friction disk center is provided with right screw rod, the connecting rod other end on right screw rod, is installed with respectively left clamp nut and right clamp nut by right driven friction disk cross-under on the left screw rod of cross-under and the right screw rod on the connecting rod.
The type rack for books lower edge is provided with baffle plate.
The beneficial effect that the utility model compared with prior art produces is:
This desktop is expanded type rack for books the table limit is clamped on the lectern desktop edge, synergy by cross bar, montant and connecting rod, can realize the change of the locus of type rack for books, screw frictional disk by clamp nut and realize the fixing of connecting rod angle, with the position that rests on suitable reading of guaranteeing that type rack for books can be stable, so that teacher's hand-free improves the teaching teaching quality.
This desktop expand type rack for books reasonable in design, simple in structure, safe and reliable, easy to use, be easy to safeguard, have good value for applications.
Description of drawings
Accompanying drawing 1 is structural representation of the present utility model;
Mark in the accompanying drawing represents respectively:
1, table limit folder, 2, butterfly bolt, 3, cross bar, 4, connector, 5, montant seat hole, 6, montant, 7, baffle ring, 8, support bar, 9, left fixed friction dish, 10, left screw rod, 11, connecting rod, 12, left driven friction disk, 13, right driven friction disk, 14, the dish hole, 15, right fixed friction dish, 16, right screw rod, 17, left clamp nut, 18, right clamp nut, 19, type rack for books, 20, baffle plate.
The specific embodiment
Below in conjunction with accompanying drawing desktop of the present utility model being expanded type rack for books is described in detail below.
As shown in drawings, desktop of the present utility model is expanded type rack for books, its structure comprises limit folder 1 and a type rack for books 19, be provided with butterfly bolt 2 on the table limit folder 1, the table limit presss from both sides 1 one sides and is provided with cross bar 3, and cross-under has connector 4 on the cross bar 3, be provided with montant seat hole 5 on the connector 4, be provided with baffle ring 7 on montant 6 shafts, baffle ring 7 diameters are greater than montant seat hole 5 diameters, and montant 6 is located on the connector 4 by 7 of baffle rings; Montant 6 tops are provided with support bar 8, support bar 8 one ends are connected with left fixed friction dish 9, left fixed friction dish 9 centers are provided with left screw rod 10, connecting rod 11 left ends are provided with left driven friction disk 12, the other end is provided with right driven friction disk 13, left driven friction disk and right driven friction disk center all offer the dish hole 14, the dish bore dia greater than left screw diameter and less than left fixed friction dish diameter, connecting rod 11 by left driven friction disk 12 cross-under on left screw rod 10; Type rack for books 19 bottoms are provided with right fixed friction dish 15, right fixed friction dish 15 centers are provided with right screw rod 16, connecting rod 11 other ends on right screw rod 16, are installed with respectively left clamp nut 17 and right clamp nut 18 by right driven friction disk 13 cross-under on the left screw rod 10 of cross-under and the right screw rod 16 on the connecting rod 11.Type rack for books 19 lower edges are provided with baffle plate 20.
Claims (2)
1. desktop is expanded type rack for books, it is characterized in that comprising limit folder and a type rack for books, be provided with butterfly bolt on the folder of table limit, the table limit presss from both sides a side and is provided with cross bar, cross-under has connector on the cross bar, is provided with montant seat hole on the connector, is provided with baffle ring on the montant shaft, the baffle ring diameter is greater than montant seat bore dia, and montant is located on the connector by the baffle ring seat; The montant top is provided with support bar, support bar one end is connected with left fixed friction dish, left fixed friction disk center is provided with left screw rod, the connecting rod left end is provided with left driven friction disk, the other end is provided with right driven friction disk, left driven friction disk and right driven friction disk center all offer the dish hole, the dish bore dia greater than left screw diameter and less than left fixed friction dish diameter, connecting rod by left driven friction disk cross-under on left screw rod; The type rack for books bottom is provided with right fixed friction dish, right fixed friction disk center is provided with right screw rod, the connecting rod other end on right screw rod, is installed with respectively left clamp nut and right clamp nut by right driven friction disk cross-under on the left screw rod of cross-under and the right screw rod on the connecting rod.
2. desktop according to claim 1 is expanded type rack for books, it is characterized in that the type rack for books lower edge is provided with baffle plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220490112 CN202950221U (en) | 2012-09-25 | 2012-09-25 | Desk top expanding book bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220490112 CN202950221U (en) | 2012-09-25 | 2012-09-25 | Desk top expanding book bracket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202950221U true CN202950221U (en) | 2013-05-29 |
Family
ID=48455821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220490112 Expired - Fee Related CN202950221U (en) | 2012-09-25 | 2012-09-25 | Desk top expanding book bracket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202950221U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109567400A (en) * | 2019-01-22 | 2019-04-05 | 东北农业大学 | Auxiliary support apparatus is used in a kind of reading of English books |
-
2012
- 2012-09-25 CN CN 201220490112 patent/CN202950221U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109567400A (en) * | 2019-01-22 | 2019-04-05 | 东北农业大学 | Auxiliary support apparatus is used in a kind of reading of English books |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130529 Termination date: 20130925 |