阅读说明：本技术 一种碎纸机防刀棒撑开机构 (Knife bar opening prevention mechanism of paper shredder ) 是由 罗世凯 于 2020-12-18 设计创作，主要内容包括：一种碎纸机防刀棒撑开机构,包括：固定安装在齿轮座与尾座间的平衡板,和套置在刀棒上的导纸片,其特征在于：所述平衡板为匚形平衡板；所述导纸片的三周边与匚形平衡板内槽三面相适配；所述导纸片侧面围绕半圆孔设有将刀轮部分围罩的弧形环罩；所述导纸片垂直设置在匚形平衡板内槽,导纸片三周边被匚形平衡板内槽框住。利用匚形平衡板内槽面与导纸片三周边的贴合接触,使导纸片受力强度得到增加。利用设置在导纸片侧面的弧形环罩将反向旋转退出的纸屑从刀轮上向下脱落,消除了纸张进入平衡板与导纸片间导致的刀棒塞纸。(A shredder knife bar spreading prevention mechanism comprising: fixed mounting is at the balance plate between gear seat and tailstock and the cover is put and is led the scraps of paper on the sword stick, its characterized in that: the balance plate is a v-shaped 21274; the three peripheries of the paper guide sheet are matched with three sides of the inner groove of the v-shaped balance plate; an arc-shaped ring cover for covering the cutter wheel part is arranged on the side surface of the paper guide sheet around the semicircular hole; the paper guide sheet is vertically arranged in an inner groove of a v-shaped balancing plate, and three peripheries of the paper guide sheet are framed by the inner groove of the v-shaped balancing plate. The stress strength of the paper guide sheet is increased by utilizing the contact between the inner groove surface of the v-21274shaped balance plate and the three peripheries of the paper guide sheet. The paper scraps which reversely rotate and exit are downwards dropped off from the cutter wheel by utilizing the arc-shaped ring cover arranged on the side surface of the paper guide sheet, and the paper blocking of a cutter rod caused by the fact that the paper enters the space between the balance plate and the paper guide sheet is eliminated.)

1. A shredder knife bar spreading prevention mechanism comprising: fixed mounting is at the balance plate between gear seat and tailstock and the cover is put and is led the scraps of paper on the sword stick, its characterized in that:

the balance plate is a v-shaped 21274;

the three peripheries of the paper guide sheet are matched with three sides of the inner groove of the v-shaped balance plate;

an arc-shaped ring cover for covering the cutter wheel part is arranged on the side surface of the paper guide sheet around the semicircular hole;

the paper guide sheet is vertically arranged in an inner groove of a v-shaped balancing plate, and three peripheries of the paper guide sheet are framed by the inner groove of the v-shaped balancing plate.

2. The shredder anti-knife bar spreading mechanism according to claim 1, characterized in that:

and an arc-shaped ring cover for wrapping the knife flywheel is arranged on one side face or two side faces of the paper guide sheet around the semicircular hole.

Technical Field

The invention relates to a paper shredder, in particular to a knife bar stretching prevention mechanism of the paper shredder.

Background

The paper shredder completes the paper shredding function through the rotation of two parallel cutter bars which are meshed with each other. The clearance between the two knife bars is set according to the design requirement, when the paper shredder is subjected to excessive paper or paper withdrawing operation, the two parallel knife bars are propped open, and the normal operation of the paper shredder is influenced. In order to prevent the knife bars from being spread, the conventional paper shredder is generally provided with a flat balance plate 01 at both sides of the two parallel knife bars, and the two knife bars are prevented from being spread by the contact fit (shown in fig. 4) of the balance plate 01 and the outer side edge of the paper guide 02 on the knife bars. However, in practical use, it is found that since the paper guide sheet has a single structure and weak strength, and one side of the paper guide sheet is in contact with the balance plates, the stress surface is small, when the paper shredder shreds, the parallel knife bars are guided by the paper and apply too much force to the balance plates at the two sides, the paper guide sheet is easy to be spread, and the effect of preventing the knife bars from being spread cannot be really achieved. When the knife bar is blocked and needs to withdraw paper, the knife wheel rotating in the reverse direction can bring the withdrawn paper scraps into a gap between the balance plate and the paper guide plate along the knife point of the knife wheel (as shown in figure 5), so that the knife bar is jammed in the paper, and the normal operation of the paper shredder is influenced.

Disclosure of Invention

The invention aims to solve the technical problem of making up the defects of the prior art and provides a knife bar spreading prevention mechanism of a paper shredder.

The technical problem of the invention is solved by the following technical scheme.

This kind of kneader prevents that sword stick struts mechanism includes: a balance plate fixedly arranged between the gear seat and the tail seat and a paper guide sheet sleeved on the knife rod.

The knife bar opening preventing mechanism of the paper shredder is characterized in that:

the balance plate is a v-shaped 21274;

the three peripheries of the paper guide sheet are matched with three sides of the inner groove of the v-shaped balance plate;

an arc-shaped ring cover for covering the cutter wheel part is arranged on the side surface of the paper guide sheet around the semicircular hole;

the paper guide sheet is vertically arranged in an inner groove of a v-shaped balancing plate, and three peripheries of the paper guide sheet are framed by the inner groove of the v-shaped balancing plate.

The technical problem of the invention is further solved by the following technical scheme.

And an arc-shaped ring cover for wrapping the knife flywheel is arranged on one side face or two side faces of the paper guide sheet around the semicircular hole.

The design principle of the anti-knife-bar spreading mechanism of the paper shredder is that the stress strength of the paper guide sheet is increased by utilizing the attachment contact of the inner groove surface of the 21274and the three peripheries of the paper guide sheet. Utilize the arc ring cover that sets up to lead the scraps of paper side to enclose the cover with position break bar, when the shredded paper was moved back by the card, the reverse rotatory break bar will block the wastepaper and withdraw from between two sword sticks, the wastepaper that withdraws from is when contacting the arc ring cover of leading scraps of paper, the wastepaper drops downwards from the break bar, can not get into the clearance of balance plate and leading scraps of paper in the same direction as reverse rotatory break bar, the stick of paper jam that has leaded to between the scraps of paper has been eliminated to the paper entering balance plate and has been led.

Compared with the prior art, the invention has the beneficial effects that: 1. strengthening 21274, preventing the knife from spreading; 2. the arc-shaped ring cover of the paper guide sheet effectively prevents the knife bar from being plugged with paper; 3. the cooperation of the 21274and the paper guide plate greatly enhances the anti-spreading strength of the knife bar, so the radial sizes of the knife shaft and the knife blade of the knife bar can be correspondingly reduced, the materials of the knife shaft and the knife blade can be saved, the size of the machine core can be reduced, and the space can be saved.

Drawings

FIG. 1 is an exploded view of the knife bar opening preventing mechanism of the paper shredder;

FIG. 2 is a schematic view of the assembly structure of the knife bar spreading prevention mechanism of the shredder shown in FIG. 1 between the gear seat and the tailstock;

FIG. 3 is a schematic view of the paper orientation of a shredder with the anti-knife bar spreading mechanism of the shredder of FIG. 1 installed during paper ejection;

FIG. 4 is a schematic view of a balance plate and a paper guide of a conventional shredder;

FIG. 5 is a schematic diagram of the paper orientation of a conventional shredder during paper ejection.

Detailed Description

The present invention will be described with reference to the following embodiments and drawings.

Example (b): as can be clearly seen from FIG. 1, the anti-knife-bar spreading mechanism of the paper shredder of the invention comprises: a gamma-shaped balancing plate 1 and a paper guide sheet 2.

The v-shaped balancing plate 1 is internally provided with a first surface 11, a second surface 12 and a third surface 13 which are contacted with the periphery of the paper guide sheet 2, the v-shaped balancing plate 1 is internally provided with a screw hole 14 which is used for fixedly mounting the v-shaped balancing plate between the gear seat and the tailstock at two ends.

The shape of the paper guide sheet 2 comprises a first periphery 21, a second periphery 22, a third periphery 23 and a third 21274, the first surface 11, the second surface 12 and the third surface 13 of an inner frame of the shape balance plate 1 are matched, the paper guide sheet 2 is provided with a semicircular hole 24 for a cutter shaft to penetrate and a circular hole 25 for a fixing rod to penetrate, and the two side surfaces of the paper guide sheet 2 are provided with arc-shaped ring covers 26 which can partially cover a cutter wheel 31 of the cutter bar 3 around the semicircular hole 24.

The knife bar opening preventing mechanism of the paper shredder is arranged on the paper shredder as shown in figure 2, wherein, both ends of the v-shaped balancing plate 1 are inserted into corresponding holes of a gear seat 4 and a tailstock (not shown), and are screwed into screw holes 14 of the v-shaped balancing plate 1 for fixing. The paper guide plate 2 is inserted through the semicircular hole 24 on the main shaft between the knife wheels 31 of the knife bar 3, the circular hole 25 of the paper guide plate 2 is inserted through the fixing rod 41 to be fixed, and the arc-shaped annular cover 26 of the paper guide plate 2 arranged between the knife wheels 31 of the knife bar 3 covers the knife wheels 31.

The v-21274h-shaped balance plate 1 covers the knife bar 3 and is vertical to the v-21274h-shaped balance plate 1, and three peripheries of the paper guide sheet 2 on the inner groove surface of the v-shaped balance plate 1 are in contact with the peripheral surface of the inner groove in a fitting manner, namely: the utility model discloses a three 21274, the first face 11 of shape balance plate 1, second face 12, third face 13 contact with first face 21 of paper guide piece 2 respectively, second face 22, third face 23, increased paper guide piece 2 and three 21274, the contact stress face of shape balance plate 1 makes the sword stick 3 atress support more firm.

As clearly shown in FIG. 3, when the paper shredder is jammed, the knife bar is operated to rotate in the reverse direction, the paper scraps discharged from the knife wheel are blocked when contacting the arc-shaped ring cover 26 of the paper guide 12, the paper scraps are separated from the knife wheel 31 and are not guided into the v-21274along the knife wheel rotating in the reverse direction, and the knife bar is effectively prevented from jamming the paper during shredding.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several equivalent substitutions or obvious modifications, which are equivalent in performance or use, without departing from the inventive concept, should be considered as falling within the scope of the present invention as defined by the appended claims.