CN-121999669-A - Counter

Abstract

The invention discloses a counter which comprises a base, a middle plate and a plurality of bead connecting rods, wherein the beads are arranged on the bead connecting rods in a serial manner in a sliding manner, the bead connecting rods are respectively arranged on the base, the base is provided with strip-shaped clamping grooves which are provided with grooves arranged in a wide-narrow staggered manner, the middle plate is detachably inserted into the clamping grooves, and the middle plate is positioned between two straight line sections of the bead connecting rods. According to the counter, the clamping grooves are provided with the grooves which are arranged in a wide-narrow staggered mode, when the middle plate is inserted into the clamping grooves, the narrower part can be used for clamping the middle plate, and the wider part can reduce stress concentration. The middle plate is easy to replace, and can be selected and replaced according to actual needs.

Inventors

• CAI JINFU
• LIU PENGYU

Assignees

• 福建省诺达轻工股份有限公司

Dates

Publication Date

20260508

Application Date

20260401

Claims (10)

1. 1. The counter is characterized by comprising a base, a middle plate, a plurality of bead connecting rods and a plurality of beads which are correspondingly connected, wherein each bead is connected to each bead connecting rod in series in a sliding manner, and each bead connecting rod is respectively arranged on the base; the base is provided with strip-shaped clamping grooves, the clamping grooves are provided with grooves which are arranged in a wide-narrow staggered mode, the middle plate is detachably inserted into the clamping grooves, the middle plate and the narrow part of the clamping grooves form interference fit, and the middle plate and the wide part of the clamping grooves form clearance fit.
2. 2. The counter of claim 1, wherein the slot comprises a first end, a second end, and a slot section disposed between the first end and the second end, the slot section is in a strip shape, and comprises a slot bottom, and a first side wall and a second side wall disposed on two sides of the slot bottom, wherein the first side wall and the second side wall are both in a concave-convex wave-shaped concave-convex structure, and the first side wall and the second side wall are mirror images disposed in a length direction of the slot bottom.
3. 3. The counter of claim 2, wherein the first side wall has protrusions and recesses, the second side wall has protrusions and recesses, the protrusions of the first side wall are disposed corresponding to the protrusions of the second side wall, the protrusions of the first side wall are tightly fitted to the middle plate, and the recesses of the first side wall are loosely fitted to the recesses of the second side wall and the middle plate.
4. 4. The counter of claim 3, wherein the protrusions of the first side wall are in line contact with the middle plate and the protrusions of the second side wall are in line contact with the middle plate.
5. 5. The counter of claim 2, wherein the first end portion is provided with a limiting groove, two guide protruding blocks are arranged in the limiting groove in a mutually-spaced mode, a positioning clamping groove is formed between the guide protruding blocks, and the second end portion has the same structure as the first end portion.
6. 6. The counter of claim 2, wherein the middle plate is paperboard.
7. 7. The counter of claim 1, wherein the base is provided with a modular insert removably mounted thereto.
8. 8. The counter of claim 1, wherein the modular insert is disposed on an end of the base, and wherein the end of the base defines a slot, the modular insert comprising a display block and an insert block, the insert block being inserted into the slot.
9. 9. The counter of claim 1, wherein the base is arranged in a strip shape, the bead connecting rods are arranged at equal intervals in a straight line along the length direction of the base, the bead connecting rods are arranged in a U-shaped rod shape along the width direction of the base, the middle plate is arranged along the length direction of the base, and the two straight line segments of the bead connecting rods are fixedly connected to the base and are positioned at two sides of the middle plate in a one-to-one correspondence manner.
10. 10. The counter of claim 1, wherein the base is provided with a sink groove on at least one side of the middle plate, the sink groove is provided with a zero clearing rod, the zero clearing rod penetrates into the end part of the abacus bead connecting rod, and the zero clearing rod is positioned at the bottom of the abacus bead.

Description

Counter Technical Field The invention belongs to the technical field of teaching aids, and particularly relates to a counter. Background The counter is a teaching aid for helping children and pupil learn mathematics units, and can vividly and vividly enable pupil to know mathematics units. The middle plate of a conventional counter (such as a zero clearing counter with publication number CN 221726677U) is usually made of plastic material, and is usually in a non-detachable or non-detachable structure. In view of the above, the present inventors have conducted intensive studies and have made the present invention. Disclosure of Invention The invention aims to provide a counter with a detachable middle plate. In order to achieve the above purpose, the technical scheme of the invention is as follows: The counter comprises a base, a middle plate, a plurality of bead connecting rods and a plurality of beads which are correspondingly connected, wherein each bead is arranged on each bead connecting rod in a serial manner in a sliding manner, and each bead connecting rod is respectively arranged on the base; the base is provided with strip-shaped clamping grooves, the clamping grooves are provided with grooves which are arranged in a wide-narrow staggered mode, the middle plate is detachably inserted into the clamping grooves, the middle plate and the narrow part of the clamping grooves form interference fit, and the middle plate and the wide part of the clamping grooves form clearance fit. Further, the clamping groove comprises a first end part, a second end part and a groove section arranged between the first end part and the second end part, wherein the groove section is strip-shaped and comprises a groove bottom, a first side wall and a second side wall which are arranged on two sides of the groove bottom, the first side wall and the second side wall are of concave-convex wave-shaped concave-convex structures, and the first side wall and the second side wall are arranged in a mirror image mode in the length direction of the groove bottom. Further, the first side wall is provided with a convex part and a concave part, the second side wall is provided with a convex part and a concave part, the convex part of the first side wall is arranged corresponding to the convex part of the second side wall, the convex part and the convex part of the second side wall are tightly matched with the middle plate, and the concave part of the first side wall is loosely matched with the concave part of the second side wall and the middle plate. Further, the convex part of the first side wall is in line contact with the middle plate, and the convex part of the second side wall is in line contact with the middle plate. Further, the first end is provided with a limit groove, two guide protruding blocks distributed in the limit groove are arranged in the limit groove, a positioning clamping groove is formed between the guide protruding blocks, and the structure of the second end is identical to that of the first end. Further, the middle plate is a paperboard. Further, the base is provided with a modularized plug-in unit which is detachably installed. Further, the modular plug-in components set up in on the tip of base, the slot has been seted up to the tip of base, the modular plug-in components include display piece and inserted block, the inserted block peg graft in the slot. Further, the base is rectangular platy setting, each the abacus bead connecting rod is sharp equidistant range arrangement along the length direction of base, each the abacus bead connecting rod is followed the width direction installation setting of base respectively, each the abacus bead connecting rod is the U-shaped rod-like, has two straightway, the medium plate is followed the length direction installation setting of base, two straightway of abacus bead connecting rod are fixed connection respectively on the base and the one-to-one is located the both sides of medium plate. Further, the base is located at least one side of the middle plate and is provided with a sinking groove, the sinking groove is provided with a zero clearing rod, the zero clearing rod penetrates into the end part of the abacus bead connecting rod, and the zero clearing rod is located at the bottom of the abacus bead. After the technical scheme is adopted, the counter has the beneficial effects that the clamping groove is provided with the grooves which are arranged in a wide-narrow staggered mode, when the middle plate is inserted into the clamping groove, the narrower part (narrow part) can be used for clamping the middle plate, and the wider part (wide part) can reduce stress concentration, thereby being beneficial to reducing local stress and facilitating assembly (providing assembly clearance). The middle plate is easy to replace, and can be selected and replaced according to actual needs. Further, set up the spacing groove at first tip and second tip, peg graft to the medium plate