quantitative paper output device

Abstract

The present invention discloses a quantitative paper discharging device: comprising two rolling clamping elements arranged in pairs and close to each other, the gap between the two rolling clamping elements is used to clamp and lead out the roll of paper, and also comprising a periodic locking mechanism, the periodic locking mechanism comprising a movable element and a locking element, the movable element and the rolling clamping element are linked and perform periodic motion; the movable element has a first state in which it moves under the action of a force No. 1, and a second state in which it moves to cooperate with the locking element and is locked. The movable element of the present invention performs periodic motion under the drive of the rolling clamping element, and under the action of the locking element, the movable element periodically switches between the first state and the second state, and when the lead-out end of the roll of paper is pulled, the first state can discharge paper, and the second state can tear the paper. Therefore, the present invention realizes quantitative paper discharging through a purely mechanical structure, has a lower cost than electrical products, is less prone to failure, and has better product reliability and stability.

Description

Technical Field

[0001] The invention relates to the technical field of sanitary products, and in particular to a quantitative paper discharging device. Background Art

[0002] In public places or home toilets, in order to facilitate people to use toilet paper, a toilet roll box is usually installed next to the washbasin or in the toilet. A roller is arranged inside the toilet roll box, and a paper tube is sleeved on the roller. One end of the toilet paper on the paper tube extends out of the toilet roll box. When people use it, they pull the toilet paper outside the toilet roll box, and then pull the paper tube to rotate around the roller. The toilet paper is continuously pulled out. When the pulled toilet paper reaches a certain length, the user tears it off for use.

[0003] This type of toilet paper roll box has the following defects: (1) The toilet paper roll box continuously discharges paper, and too much toilet paper is often pulled out. Some users do not pay attention to saving paper and pull out far more toilet paper than they actually need, causing waste; (2) One end of the toilet paper needs to extend out of the toilet paper roll box and be exposed to the air in the bathroom, which is easily contaminated by the external environment and affects the hygiene of the paper towel.

[0004] Based on this, some paper dispensing machines that use timing or metering devices to control the length of paper dispensing have appeared on the market. A typical example is the patent document (CN209300959U, 2018.09.12), which is equipped with a paper dispensing device and a control circuit. The paper dispensing device uses an electrically driven active shaft to achieve paper dispensing, and the control circuit uses the Hall element to collect the number of rotations of the active shaft to control the amount of paper dispensing. Although the above-mentioned paper dispensing machine can accurately control paper dispensing, it is a small electrical appliance product that requires a permanent power supply, has high manufacturing and operation and maintenance costs, and the electrical components are prone to aging and poor reliability. Summary of the invention

[0005] In order to realize low-cost and reliable quantitative paper discharging of roll paper, the present invention provides a quantitative paper discharging device.

[0006] The technical solution adopted by the present invention is as follows: a quantitative paper discharging device, comprising two rolling clamping elements arranged in pairs and close to each other, the gap between the two rolling clamping elements is used to clamp and lead out the roll of paper, and also includes a periodic locking mechanism, the periodic locking mechanism includes a movable element and a locking element, the movable element is linked with the rolling clamping element and performs periodic movement; the movable element has a first state in which it moves under the action of a first force, and a second state in which it moves to cooperate with the locking element to lock, and a third state in which it switches from the second state to the first state under the action of a second force; the first force and the second force are forces for pulling the roll of paper and driving the rolling clamping element to rotate, the first force is less than the tearing force at the easy-tear line of the roll of paper, and the second force is greater than the tearing force at the easy-tear line of the roll of paper.

[0007] The beneficial effects of the present invention are as follows: the movable element of the present invention performs periodic motion under the drive of the rolling clamping element, and under the action of the locking element, the movable element periodically switches between the first state and the second state, and when the lead-out end of the roll paper is pulled, the first state can discharge paper, and the second state can tear the paper. Therefore, the present invention realizes quantitative paper discharge through a purely mechanical structure, has a lower cost than electrical products, is less prone to failure, and has better product reliability and stability.

[0008] Preferably, the movable element performs linear reciprocating motion or circular motion.

[0009] Preferably, the movable element comprises a cam, the locking element comprises a limiting claw in contact with an outer wheel edge of the cam, and at least one of the cam and the limiting claw is an elastic structure.

[0010] Preferably, the rolling clamping element comprises a roller, and a gear set is used to transmit the transmission between the roller and the cam.

[0011] Preferably, an anti-slip sleeve is disposed on the outside of the drum, and a plurality of elastic protrusions are disposed on the outer peripheral wall of the anti-slip sleeve.

[0012] Preferably, the two rollers are driven by gears to rotate in opposite directions at the same speed.

[0013] Preferably, a notch is provided on the outer rim of the cam, and when the movable element is in the second state, the end of the limiting claw is embedded in the notch.

[0014] Preferably, the limiting claw is a hinged rod structure, equipped with an elastic reset member, and a movable end thereof contacts with the outer wheel edge of the cam and swings therewith.

[0015] Preferably, at least one of the rolling clamping elements is equipped with a rotation drive.

[0016] Preferably, it also includes a shell assembly and a reel assembly, wherein the reel assembly is used to place the roll of paper, and the rolling clamping element, the movable element, the locking element, the rotating drive component and the reel assembly are all installed in the shell assembly, and the rotating drive component is exposed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of an embodiment of the present invention.

[0018] Figure 2 Schematic diagram of an explosion of an embodiment of the present invention.

[0019] Figure 3 It is a schematic diagram of the assembly of the movable element and the locking element in the embodiment of the present invention.

[0020] Figure 4It is a schematic diagram of assembly of the movable element and the locking element at another angle in the embodiment of the present invention.

[0021] Figure 5 It is a formal schematic diagram of the movable element and the locking element in the embodiment of the present invention.

[0022] Figure 6 Schematic diagram of a cam in an embodiment of the present invention.

[0023] Figure 7 Schematic diagram of various states of active elements in an embodiment of the present invention.

[0024] Figure 8 Schematic diagram of a rolling clamping element in an embodiment of the present invention.

[0025] Roll paper 01, rolling clamping element 100, movable element 200, locking element 300, rotating drive member 400, shell assembly 500, reel assembly 600, roller 101, anti-slip sleeve 102, elastic protrusion 103, cam 201, gear set 202, notch 203, limit claw 301, elastic reset member 302, outer shell 501, inner box 502, inner shaft 601, outer cylinder 602. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the embodiments and drawings.

[0027] like Figure 1 , 2 As shown, a complete paper dispenser includes a housing 501. A roll assembly 600 is provided on the upper part of the housing 501 for placing the paper roll 01. A quantitative paper discharge device is provided below the roll assembly 600. The lead-out end of the paper roll 01 passes through the quantitative paper discharge device to the outside of the housing 501.

[0028] like Figures 3 to 7 As shown, the quantitative paper discharging device includes two rollers 101 arranged in pairs and close to each other, and the lead-out end of the roll paper 01 passes downward from between the two rollers 101. It also includes a cam 201 and a limit claw 301. The cam 201 is linked with the roller 101 through a gear set 202, and the limit claw 301 is a hinged rod structure, specifically a lever structure, which is hinged in the middle and has an elastic reset member 302, i.e., a spring, at one end. The elastic reset member 302 keeps the other end of the limit claw 301 in contact with the outer wheel edge of the cam 201 at all times. In addition, a knob as a rotation driving member 400 is also installed on the roller 101.

[0029] Due to the structural characteristics of the cam 201 itself, the magnitude of the force exerted by the limiting claw 301 on the cam 201 changes periodically during the rotation process. Figure 7 As shown:

[0030] (1) The process from A to B to C is the first state, in which the movement is relatively gentle and does not need to cross the maximum radius of the cam 201. Only a relatively small force No. 1 is required to overcome the elastic force of the elastic reset member 302;

[0031] (2) Position C is the second state, in which the limiting claw 301 has the greatest limiting effect on the cam 201, and the force No. 1 can no longer make the cam 201 continue to rotate;

[0032] (3) From C to D to E is the third state. In this state, by applying a larger second force, the cam 201 can pass over the limit claw 301 and return from the second state to the first state.

[0033] The first and second forces in the above process are the forces for manually pulling the lead-out end of the paper roll 01 and driving the roller 101 to rotate. According to the characteristics of the paper roll 01 itself, the elastic coefficient of the elastic reset member 302 is set, so that the first force is less than the tearing force at the easy tear line of the paper roll 01, and the second force is greater than the tearing force at the easy tear line of the paper roll 01. Thus, the paper is discharged in the first state and the paper is torn in the second state. When there is no easy tear line between the lead-out end of the paper roll 01 and the roller 101, a larger second force can be generated by pulling the paper roll 01, that is, the third state is completed. In addition, the rotating drive member 400 set in this embodiment is a manual knob. When the lead-out end of the paper roll 01 is short and cannot be manually pulled, it drives the roller 101 to rotate to play the role of assisting paper discharge and avoid paper jams. This embodiment realizes quantitative paper discharge through a purely mechanical structure, which is lower in cost than electrical products, less prone to failure, and has better product reliability and stability.

[0034] like Figure 6 As shown, a notch 203 is provided on the outer rim of the cam 201, so when the cam 201 is in the second state, the end of the limiting claw 301 is embedded in the notch 203. By providing the notch 203, this embodiment can improve the locking force of the limiting claw 301 on the cam 201 in the second state, so that the second force is significantly greater than the first force, thereby avoiding the situation where the paper is torn continuously.

[0035] like Figure 3 , 4 As shown, a gear set 202 is used for transmission between the roller 101 and the cam 201. The number of stages and the transmission ratio of the gear set 202 can be designed according to actual needs. Generally, it is required that the roller 101 rotates multiple times and the cam 201 rotates one circle correspondingly. In this way, it can be ensured that a sufficient length of paper is pulled out within one movement cycle of the cam 201.

[0036] like Figure 8As shown, the outside of the roller 101 is provided with an anti-skid sleeve 102, and the outer peripheral wall of the anti-skid sleeve 102 is provided with a plurality of elastic protrusions 103, and the above structure together constitutes a rolling clamping element 100. This structure can ensure that the roll paper 01 and the roller 101 can be in uniform contact along the axial direction, avoiding the situation that one side of the two rollers 101 is tight and the other side is loose due to the error of the shape and axis of the roller 101, and ensuring smooth paper discharge. In addition, the roller 101 can be replaced by other forms of rotating parts, as long as it is satisfied that it can maintain good contact with the roll paper 01.

[0037] like Figure 3 , 4 As shown, the two rollers 101 rotate in opposite directions at the same speed through gear transmission. This structure can ensure that the two rollers 101 rotate at the same speed, avoiding wrinkles caused by one side of the roll paper 01 being faster than the other side.

[0038] like Figure 2 As shown, a detachable inner box 502 is provided in the outer shell 501, and together they form a shell assembly 500. The quantitative paper discharging device is installed in the inner box 502. After the inner box 502 is assembled, the quantitative paper discharging device is completely installed in the outer shell 501. The assembly process is simple, and modular production and replacement can be realized.

[0039] like Figure 2 As shown, the reel assembly 600 consists of an inner shaft 601 and an outer cylinder 602 which are arranged concentrically, and the outer cylinder 602 and the inner shaft 601 can achieve unidirectional rotation through structures such as ratchet pawls, so that the paper roll 01 on the outer cylinder 602 can achieve unidirectional rotation with a certain resistance, avoiding the paper roll 01 from being pulled out too long at once.

[0040] This embodiment uses a rotating cam 201 as the movable element 200 to achieve periodic control of the drum 101. The movable element 200 can also be a slider with linear reciprocating motion, which is linked to the drum 101 through a crank slider mechanism. In addition, the movable element 200 can also use other forms of periodic motion.

[0041] In this embodiment, the outer wheel edge of the cam 201 contacts the end of the limiting claw 301, and the limiting claw 301 elastically floats under the action of the elastic reset member 302, so that it can cross the notch 203 on the cam 201 under the action of the second force. In this embodiment, the limiting claw 301 can also be set to be fixed, and the cam 201 can be set as an elastic wheel, and the unlocking function can be achieved through the elasticity of the cam 201 itself.

[0042] Obviously, the above embodiments of the present invention are merely examples for illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to exhaust all implementation methods here. However, these obvious changes or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A quantitative paper discharging device, characterized in that: It comprises two rolling clamping elements (100) arranged in pairs and close to each other, the gap between the two rolling clamping elements (100) being used to clamp and lead out the roll paper (01), and also comprises a periodic locking mechanism, the periodic locking mechanism comprising a movable element (200) and a locking element (300), the movable element (200) and the rolling clamping element (100) being linked to perform periodic motion; The movable element (200) has a first state in which it moves under the action of a first force, a second state in which it moves to cooperate with the locking element (300) for locking, and a third state in which it switches from the second state to the first state under the action of a second force; The first acting force and the second acting force are forces for pulling the roll paper (01) and driving the rolling clamping element (100) to rotate, the first acting force is smaller than the tearing force at the easy tear line of the roll paper (01), and the second acting force is larger than the tearing force at the easy tear line of the roll paper (01); The movable element (200) comprises a cam (201), and the locking element (300) comprises a limiting claw (301) in contact with an outer wheel edge of the cam (201); The movable element (200) performs circular motion; A notch (203) is provided on the outer wheel edge of the cam (201), and when the movable element (200) is in the second state, the end of the limiting claw (301) is embedded in the notch (203); The limiting claw (301) is a hinged rod structure and is provided with an elastic reset member (302), one movable end of which contacts the outer wheel edge of the cam (201) and swings accordingly.

2. The quantitative paper discharging device according to claim 1, characterized in that: The rolling clamping element (100) comprises a roller (101), and a gear set (202) is used for transmission between the roller (101) and the cam (201).

3. The quantitative paper discharging device according to claim 2, characterized in that: An anti-slip sleeve (102) is provided on the outside of the drum (101), and a plurality of elastic protrusions (103) are provided on the outer peripheral wall of the anti-slip sleeve (102).

4. The quantitative paper discharging device according to claim 2, characterized in that: The two rollers (101) are driven by gears to rotate in opposite directions at the same speed.

5. The quantitative paper discharging device according to claim 1, characterized in that: At least one of the rolling clamping elements (100) is provided with a rotation drive (400).

6. The quantitative paper discharging device according to claim 5, characterized in that: It also includes a shell assembly (500) and a reel assembly (600), wherein the reel assembly (600) is used to place the roll paper (01), and the rolling clamping element (100), the movable element (200), the locking element (300), the rotating drive component (400) and the reel assembly (600) are all installed in the shell assembly (500), and the rotating drive component (400) is exposed.

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