CN203073702U - Extensible bookends - Google Patents

Abstract

A pair of extensible bookends is a pair of bookends which are capable of clamping books and preventing the books from scattering everywhere. The extensible bookends are composed of two bookend bodies (1), a small chain (2) and a tightening device (S). The extensible bookends are characterized in that iron plates on two sides of the upper portions of the bookend bodies are folded to the outer sides to form winch frame (6), and a left circular hole and a right circular hole are formed, three pawls which are uniformly distributed with the interval of 120 degrees are further formed on the inner side around of the circular hole at the left side, shafts (11) are installed inside the circular holes in a movable mode, through holes are drilled in the shafts (11) in the center diameter direction, threads are arranged inside the holes, a winch (7) and a spring (9) are sleeved on the outer side of each shaft (11), a ratchet wheel (5) is arranged at one end of the left end of the winch (7), a circular through hole is drilled on one side in the middle of the winch (7), and a screw (8) penetrates through the circular through hole, the screw (8) is screwed inside the thread holes of the shafts (11) in the center diameter direction, and the right end of the chain (2), the winches (7), rotating buttons (5) and the shafts (11) are fixed to be a whole.

Description

Scalable book end

Technical field:

The utility model relates to a kind of book end.

Background technology:

Present book end is not put several books, as long as the book of putting more than, the secondhand book of particularly having seen has the very big power of opening, and book end will open to both sides, and a ground often is scattered.

Summary of the invention:

The utility model discloses a kind of scalable book end, and purpose is to clamp books, avoids being scattered.

The utility model is by the book end body, and gimmal, tightener composition, the left end of gimmal are fixed on book end body upper end, the left side; The iron plate on both sides, top, book end body the right is folded to the outside, make winch rack, and each circular hole about going out, circular inboard, the left side also dashes 120 ° of three uniform ratchets, in this circular hole axle is installed, knob and axle are integrated stepped circular shafts, and thick head is a knob, and there is annular knurl the outside, thin is axle, axle central diameter direction is drilled with a through hole, and the hole inside fire attack has screw thread, is with capstan winch and spring on the axle, capstan winch is that two ends are thick, middle thin sleeve, one of left end is shaped on the plane ratchet, three click-fit that this ratchet and winch rack inboard are gone out, make the capstan winch can only one-directional rotation, round tube hole of a sidetracking penetrates a screw in the middle of the capstan winch in this round tube hole, and this screw screws in the screwed hole of axle central diameter direction, make the chain right-hand member, capstan winch 7, knob 5 and axle 11 are fixed into as a whole, spring housing is at the axle right-hand member, and purpose is to make three ratchets of ratchet and winch rack inboard hold out against capstan winch, knob, axle can only unidirectionally clockwise rotate.The tightener shell is the shelly part of an iron plate punching out, relies on the vertical notch of both sides and the little flange of winch rack termination to cooperate, and is fixed on the capstan winch outside.

During use, after book put well, as long as clockwise turn knob, rotate simultaneously together with capstan winch, chain is wrapped on the capstan winch with the axle of knob one, chain tension, book does not just loose.When wanting to get book or putting book, as long as promote knob backward, ratchet will break away from three ratchets of winch rack inboard, and capstan winch is under the tension force pulling of chain and book, and the very fast multi-turn that rotates counterclockwise is unclamped chain, just can get book arbitrarily and add book.

The beneficial effects of the utility model are: can clamp books, avoid the books ground that is scattered.

Description of drawings:

Bottom in conjunction with the accompanying drawings.

Fig. 1 is an outline drawing of the present utility model.

Fig. 2 is the structural principle for the performance tightener, and the E of tightener that removes shell is to (side-looking) view.The direction sign of view is in Fig. 1.

Fig. 3 is the structural principle for the performance tightener, and the F of tightener that removes shell is to (top view) view.The direction sign of view is in Fig. 1.

Fig. 4 is that G of the present utility model is to enlarged drawing.The direction sign of view is in Fig. 1.

Among the figure: 1. book end body, 2 gimmals, 3. knob, 4. tightener shell, 5. ratchet, 6. winch rack, 7. capstan winch, 8. screw, 9. spring, 10. little flange, 11., S. tightener, E, F, G.. line of vision symbol.

The specific embodiment:

The utility model is by book end body 1, gimmal 2, and tightener S forms, that of book end body 1 left side is the same with common book end, unique difference is that top is shaped on a vertical little nose, outwards rushes out on position of center line top, and effect is the left end (see figure 4) of fixedly gimmal 2; Difference with common book end on book end body 1 the right is: the iron plate on both sides, top is folded to the outside, make winch rack 6, and each circular hole about going out, the left side (Fig. 2,3) the circular inboard also dashes 120 ° of three uniform ratchets, be movably installed with axle 11 in this circular hole, knob 3 and axle 11 are integrated stepped circular shafts, thick head is a knob 3, there is annular knurl the outside, thin head is an axle 11, axle 11 central diameter directions are drilled with a through hole, the hole inside fire attack has screw thread, the outside of axle 11 is with capstan winch 7 and spring 9, capstan winch 7 is that two ends are thick, middle thin sleeve, one of left end is shaped on plane ratchet 5,120 ° of three uniform click-fit that this ratchet 5 and winch rack 6 inboards are gone out, make the capstan winch 7 can only one-directional rotation, one of sidetracking and axial vertical round tube hole penetrate a screw 8 in the middle of the capstan winch 7 in this round tube hole, and this screw 8 screws in the screwed hole of 11 a central diameter direction, make chain 2 right-hand members (Fig. 1), capstan winch 7, knob 5 and axle 11 are fixed into as a whole, spring 9 is enclosed within axle 11 right-hand member (Fig. 2,3), purpose is to make three ratchets of ratchet 5 and winch rack 6 inboards hold out against capstan winch 7, knob 3, axle 11 can only unidirectionally clockwise rotate.Tightener shell 4 is shelly parts of an iron plate punching out, relies on the vertical notch (Fig. 1) of both sides and the little flange 10 (Fig. 2,3) of winch rack 6 terminations to cooperate, and is fixed on the capstan winch outside.

During use, after book put well, as long as clockwise turn knob 3, rotate simultaneously together with capstan winch 7 with the axle 11 of knob 3 one, chain 2 is wrapped on the capstan winch 7 chain 2 tensionings, book does not just loose, when wanting to get book or putting book, as long as overcome spring 9 elastic force to pusher knob 3, ratchet 5 will break away from three ratchets of winch rack 6 inboards, capstan winch 7 is under the tension force pulling of chain and book, the very fast multi-turn that rotates counterclockwise is unclamped chain, just can get book arbitrarily and add book.

Claims (1)

1. scalable book end, by book end body (1), gimmal (2), tightener (S) is formed, it is characterized in that, the iron plate on book end body (1) both sides, top is folded to the outside, make winch rack (6), and each circular hole about going out, circular inboard, the left side also dashes 120 ° of three uniform ratchets, is movably installed with axle (11) in this circular hole, and knob (3) and axle (11) are integrated stepped circular shafts, axle (11) central diameter direction is drilled with a through hole, the hole inside fire attack has screw thread, and the outside of axle (11) is with capstan winch (7) and spring (9), and one of capstan winch (7) left end is shaped on ratchet (5), round tube hole of a sidetracking in the middle of the capstan winch (7), penetrate a screw (8) in this round tube hole, this screw (8) screws in the screwed hole of axle (11) central diameter direction, makes chain (2) right-hand member, capstan winch (7), knob (5) and axle (11) are fixed into as a whole.

Images