Learning Materials

Abstract

To provide learning materials that enable easier and more accurate experimental learning. [Solution] The launch lane LN has an engagement piece HK capable of engaging elastic rubber and a plurality of mounting holes HO that open away from the engagement piece HK; a launch pad BTN that is integrally molded with an engagement piece 13 that can engage with any mounting hole, an insertion piece 14 that can be inserted into another mounting hole, a swinging part 12 configured to be swingable, and a locking piece LK that moves integrally with the swinging part 12; and a projectile that has a holding part capable of holding the base end of the elastic rubber, and a receiving hole that opens to receive the locking piece LK.

Description

[Technical field]

[0001] This invention relates to learning materials for lower grade elementary school students, and in particular to learning materials suitable for experiments on "the action of wind and rubber" that are taught in third grade science classes. [Background technology]

[0002] Various experimental tools have been proposed for learning about "the action of wind and rubber." These generally consist of a projectile shaped like a car, a launch lane with a number engraved to specify the launch position, a launch pad that is fixed to the end of the launch lane to realize the launching action, and a rubber band that is stretched and stretched between the launch pad and the projectile prior to the launching action (Patent Documents 1-2).

[0003] Then, by sequentially changing the distance between the launch pad and the projectile, the stretch (contraction force) of the rubber band is changed, and the distance traveled by the projectile launched from different positions with different contraction forces is measured, learning about the relationship between the stretch of the rubber band and the distance traveled by the projectile (rubber force). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Elementary school teaching materials general catalog 21P~22Phttps: / / www.hakubun.co.jp / dbook / catalog-2024 / #target / page_no=23 [Patent Document 2] Elementary school science worksheet "The force of wind and rubber" https: / / www.artec-kk.co.jp / dl / rika-worksheet / pdf / 093177man_K0224_J.pdf Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the configurations of Patent Document 1 and Patent Document 2, the launch pad is not a single unit, so assembly work is required, and the experiment preparation work is not necessarily easy for third grade elementary school students. In addition, in the configurations of Patent Document 1 and Patent Document 2, the work of accurately engaging the claw-shaped hook piece formed on the launch pad with a part of the projectile is required, which is somewhat cumbersome. And if the hook piece engagement work is inaccurate, the launch direction of the projectile will be misaligned, making it impossible to conduct an accurate experiment.

[0006] The present invention has been made in view of the above problems, and has as its object to provide learning materials that enable easier and more accurate experimental learning. [Means for solving the problem]

[0007] In order to achieve the above-mentioned objective, the learning material of the present invention is composed of a launch lane (LN) having a locking piece (HK) capable of locking the tip of an elastic rubber and a plurality of mounting holes (HO) opening at an appropriate distance from the locking piece (HK), a first piece (13) capable of engaging with any mounting hole (HO), a second piece (14) capable of being inserted into a second mounting hole other than the first mounting hole with which the first piece is engaged, a swinging part (12) configured to be swingable, and a protruding piece (LK) that moves integrally with the swinging part (12), and a projectile (VEH) having a holding part (HLD) capable of holding the base end of the elastic rubber, and a storage part (RV) that is open so as to be able to receive the protruding piece (LK).

[0008] In this device, when the protruding piece (LK) is accommodated in the accommodation portion (RV) and the elastic rubber held in the holding portion (HLD) is engaged with the engagement piece (HK), and a part of the oscillating portion (12) is pressed, the protruding piece (LK) detaches from the accommodation portion (RV), and the projectile (VEH) moves along the launch lane (LN). Effect of the Invention

[0009] According to the present invention, there is no need to assemble the launch pad, and the protruding piece that swings together with the swinging part is housed in the projectile housing, making experimental learning easier and more accurate. [Brief description of the drawings]

[0010] [Figure 1] This is a drawing explaining launch pad BTN and launch lane LN. [Diagram 2] 1 is a drawing for explaining a vehicle-type projectile VEH. [Diagram 3] This is a drawing showing the state of the launch vehicle VEH before it is attached to the launch pad BTN. [Figure 4] This is a drawing showing the launch vehicle VEH attached to the launch pad BTN. [Diagram 5] 1 is a diagram illustrating the positioning operation in which the projectile VEH is correctly moved to the launch pad BTN. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The present invention will be described in detail below based on the embodiment. The learning material according to the embodiment is composed of a launch pad BTN, a launch lane LN, a projectile VEH, and a rubber band (not shown). In the learning material having such a configuration, FIG. 1 shows the launch pad BTN and the launch lane LN (LN1+LN2). Also, FIG. 2 shows a car-type projectile VEH that is launched along the launch lane LN based on the ON operation of the launch pad BTN.

[0012] 1(a), the launch lane LN is composed of a first member LN1 having a locking piece HK at its tip for locking a rubber band, and a second member LN2 having a number of mounting holes HO...HO at equal intervals. Here, a receiving portion CN1 having a U-shaped cross section is formed at the base end of the first member LN1, while an insertion portion CN2 that is housed in the receiving portion CN1 is formed at the tip of the second member LN2.

[0013] A cylindrical hole CR is formed in the center of the insertion portion CN2 of the second member LN2, and a cylindrical protrusion PR is formed in the internal space of the receiving portion CN1 of the first member LN1 corresponding to the cylindrical hole CR. The cylindrical protrusion PR of the first member LN1 is inserted relatively tightly into the cylindrical hole CR of the second member LN2, thereby integrating the first member LN1 and the second member LN2 (see FIG. 1(b)).

[0014] The multiple mounting holes HO...HO formed in the second member LN2 are all of the same shape, and are configured so that the launch pad BTN is attached to two spaced apart mounting holes HO, HO. Although not particularly limited, the launch pad BTN in the embodiment is formed with dimensions such that there are four mounting holes HO between the pair of mounting holes HO, HO to which the launch pad BTN is attached.

[0015] A different numerical value is engraved on the base end side of each of the mounting holes HO...HO so that the mounting position of the launch pad BTN can be specified. Although not particularly limited, in the embodiment, eleven numerical values ​​(15, 14,...5) are engraved on the base end side of each of the eleven openings (HO...HO) from the terminal position of the launch lane LN toward the tip end.

[0016] The first member LN1 may have a triangular opening to specify the direction of launch toward the locking piece HK and to reduce weight (see Figs. 3 and 4). It is also preferable to provide star-shaped openings in both the first member LN1 and the second member LN2 to stimulate the interest of elementary school children and to reduce weight (see Figs. 3 and 4).

[0017] Next, as shown in Figures 1(c) to 1(g), the launch pad BTN is an integrally molded plastic product formed into a box shape as a whole, and is configured to have both wall parts 10, 11 formed at a distance so as to straddle the second member LN2, and a tongue part 12 extending in a thin plate shape from the center of the left and right ends of both wall parts 10, 11 toward the base end side of the launch lane LN. Since the tongue part 12 is extended in a cantilevered state in a thin plate shape, it resiliently swings in response to the rearward movement (positioning movement) of the projectile VEH or a light pressing operation.

[0018] Furthermore, in the front and rear walls of the launch pad BTN, at the left-right central position between the wall portions 10, 11, there are formed an engagement piece 13 which is L-shaped in cross section and an insertion piece 14 which is gate-shaped in front view and somewhat thick. Since the launch pad BTN of this embodiment is formed with the engagement piece 13 and the insertion piece 14, when the engagement piece 13 of the launch pad BTN in an inclined position is inserted in an inclined state into an appropriate mounting hole HO, and then the launch pad BTN is returned to a horizontal position, the insertion piece 14 of the launch pad BTN is inserted somewhat tightly.

[0019] In this mounted state, the engagement piece 13 having an L-shaped cross section engages with the inner wall of the mounting hole HO of the launch lane LN (second member LN2), so even if the launch pad BTN receives a strong contraction force from the rubber band, there is no risk of the launch pad BTN bouncing up with the insertion piece 14 as a fulcrum. Although not limited in any way, in this embodiment, the mounting hole HO into which the insertion piece 14 is inserted is offset by five pieces toward the tip side from the mounting hole HO into which the engagement piece 13 having an L-shaped cross section is inserted.

[0020] A round plate-shaped operating piece ON is provided at the thin plate-shaped tip of the tongue portion 12 of the launch pad BTN, and an upwardly protruding lock piece LK is formed adjacent to this operating piece ON. Here, the lock piece LK is configured in a planar U-shape with a base end wall L0 extending in the width direction of the tongue portion 12 and left and right walls L1, L2 extending in the base end direction of the tongue portion 12 perpendicular to the base end wall L0.

[0021] The height of the left and right walls L1, L2 linearly decreases toward the base end direction of the tongue portion 12, and the top surfaces of the left and right walls L1, L2 form an inclined surface that decreases forward from the base end wall L0. As described later, this inclined surface functions as a guide surface when receiving the rear end of the projectile VEH.

[0022] Next, a projectile VEH shaped like an automobile will be described with reference to Fig. 2. Fig. 2(a) is a bottom view showing the back side of the projectile VEH turned upside down, Fig. 2(b) is a central cross-sectional view of the projectile VEH cut in the front-rear direction at the center in the width direction, and Fig. 2(c) is a perspective view of the projectile VEH as seen from the back side.

[0023] As shown in Fig. 2, the head of the projectile VEH is formed with a holding part HLD with a cylindrical rod for fitting a rubber band. Meanwhile, the base end of the projectile VEH is configured with protrusions P1 and P2 protruding from both the left and right ends, a housing cavity RV that opens in a house shape to receive the main parts of the launch pad BTN, a blocking wall ST that forms the front flat surface of the housing cavity RV, and a trapezoidal abutment part CNT that forms the house shape of the housing cavity RV.

[0024] As shown in Fig. 5, the house-like shape of the accommodation hole RV is composed of a top side H1 that extends straight to the left and right, inclined sides H2, H2 that slope down from the left and right ends of the top side H1, and vertical sides H3, H3 that continue from the inclined side H2. The left and right length of the top side H1 is almost the same as the left and right length of the base end wall L0 of the tongue portion 12, and the left and right length of the top side H1 is set to be slightly longer. In addition, the inclined sides H2, H2 function as guide sides that guide the lock piece LK toward the top side H1, and the guided base end wall L0 is received by being in close contact with the top side H1.

[0025] Returning to FIG. 2, as shown in FIG. 2, the left and right protrusions P1, P2 are both formed in a trapezoidal shape in a plan view, protruding rearward from the contact portion CNT (FIG. 2(a)). Therefore, two V-shaped grooves V1, V2 are formed between the left and right protrusions P1, P2 and the central contact portion CNT. Also, as shown in the central cross-sectional view of FIG. 2(b), the contact portion CNT is provided at a higher position than the protrusions P1, P2, so that when the student pulls the projectile VEH toward the launch pad BTN against the contraction force of the rubber band, the tongue portion 12, which can swing with elastic force, passes under the contact portion CNT and slides into the storage hole RV.

[0026] In order to smoothly realize the above operation, the contact part CNT of this embodiment is formed in a trapezoid shape with the top side H1 of the accommodation hole RV (see FIG. 5) and the inclined sides H2, H2 of the accommodation hole RV that spread in a V-shape from the top side H1 (see FIG. 5), as shown in FIG. 2(a). This contact part CNT is divided into an upright vertical part C0, a guide part C1 which is the dark shaded part in FIG. 2(a), and a flat horizontal part C2, as shown in FIG. 2(b), and smooths the sliding movement until the resiliently deformed tongue part 12 passes under the contact part CNT and the lock piece LK is accommodated in the accommodation hole RV. In order to facilitate this sliding movement, the guide part C1 is formed in an arc shape (R surface) as shown in FIG. 2(b), but may be formed in a linear inclined shape (C surface).

[0027] 2(a) and 2(c), the darkly shaded areas indicate the guide path when the tongue portion 12 of the launch pad BTN is received in the storage cavity RV of the projectile VEH. Meanwhile, in FIG. 2(c), the lightly shaded areas indicate the blocking wall ST that receives the lock piece LK and the protrusions P1 and P2 that guide the lock piece LK of the tongue portion 12 into the V-grooves V1 and V2. Then, the lock piece LK overcomes the abutment portion CNT, or the lock piece LK is guided into the V-grooves V1 and V2, whereby the lock piece LK is received in the storage cavity RV.

[0028] FIG. 3 shows the state before the projectile VEH is attached to the launch pad BTN, and shows the state in which the lock piece LK of the launch pad BTN is waiting for the abutment part CNT of the projectile VEH to move backward. Meanwhile, FIG. 4 shows the state in which the projectile VEH is attached to the launch pad BTN, and shows the state in which the lock piece LK of the launch pad BTN is housed in the housing hole RV of the projectile VEH. In this housing state, the base end wall L0 of the lock piece LK abuts against the top edge H1 of the housing hole RV, and the positioning operation is correctly completed (see FIG. 5(g)). As described above, in this embodiment, the left-right length of the base end wall L0 corresponds to the left-right length of the top edge H1, and the base end wall L0 abuts exactly against the top edge H1, thereby achieving correct positioning.

[0029] Fig. 5 is a diagram for explaining that the above-mentioned positioning operation is automatically performed. In each figure, the upper surface of the lock piece LK is colored black in order to clarify the U-shaped outline of the lock piece LK. Also, the V-grooves V1 and V2 are colored gray.

[0030] Continuing the explanation based on the above, if an elementary school student pulls the projectile VEH strongly backward, it may reach the state of Fig. 5(a) or Fig. 5(c), for example. However, in this embodiment, the V-grooves V1 and V2 are formed, the abutment part CNT is formed at a slightly higher position, and the tongue part 12 is configured to be able to resiliently swing, so that the lock piece LK of the tongue part 12 is automatically guided toward the bottom of the V-groove.

[0031] That is, if the projectile VEH is pulled further backward against the contraction force of the rubber band from the state of Figure 5(a) or Figure 5(c), the left and right walls L1, L2 of the lock piece LK will slide along the V-grooves V1, V2, and then overcome the abutment part CNT, and the lock piece LK will be accommodated in the accommodation hole RV. Then, if you release your hand at an appropriate timing, the lock piece LK will slide up the inclined side H2 of the accommodation hole RV based on the contraction force of the rubber band (see Figure 5(e)), and the base end wall L0 of the lock piece LK will be abutted perfectly against the top side H1 of the accommodation hole RV, and the positioning operation of the projectile VEH will be correctly completed (see Figure 5(g)).

[0032] Even if the elementary school student is late in releasing his / her hand, the movement of the lock piece LK is prevented by the blocking wall ST (see Fig. 5(f)), so if the elementary school student releases his / her hand at this timing, the state automatically moves to the state shown in Fig. 5(g) and the positioning operation of the projectile VEH is correctly completed. In other words, the inclined side H2 of the receiving hole RV functions as a guide side that guides the lock piece LK toward the top side H1 of the receiving hole RV.

[0033] Thereafter, by pressing the operating piece ON of the launch pad BTN, the projectile VEH held by the lock piece LK is released, and the projectile VEH is launched with force based on the elastic force of the rubber band. Before the launch operation, the base end wall L0 of the lock piece LK is positioned so that it abuts against the top edge H1 of the storage hole RV, so the projectile VEH moves straight along the launch lane LN, and accurate experimental results regarding the "rubber force" can be obtained.

[0034] As described above, in this embodiment, the lock piece LK formed on the swingable tongue portion 12 is configured to slide into the accommodating hole RV formed in the projectile VEH. Furthermore, V-shaped grooves V1, V2 are provided on both sides of the abutment portion CNT of the projectile VEH, and the accommodating hole RV, which is provided at a slightly higher position, is opened in the shape of a house, so that correct positioning operation can be easily and automatically achieved. [Explanation of symbols]

[0035] HK locking piece HO mounting hole LN Launch Lane 13 First piece (engaging piece) 14 2nd piece (insertion piece) 12 Swinging part (tongue part) LK Protruding piece (lock piece) BTN Launch Pad HLD holding part RV Storage Hole VEH Projectile

Claims

1. a launch lane provided with a locking piece capable of locking a tip of an elastic rubber and a plurality of mounting holes opening at an appropriate distance from the locking piece; a launch pad that is integrally molded with a first piece that can be engaged with any mounting hole, a second piece that can be inserted into a second mounting hole other than the first mounting hole with which the first piece is engaged, a swinging part that is configured to be swingable, and a protruding piece that moves integrally with the swinging part; A learning material comprising: a projectile having a holding portion capable of holding the base end of the elastic rubber, and a receiving hole that is open so as to be able to receive the protruding piece.

2. The learning material described in claim 1, wherein the protruding piece is formed in an approximately C-shape with a base end wall that is linear in a plan view and linear left and right walls that are perpendicular to the base end wall, and the top surfaces of the left and right walls form tapered surfaces that are inclined when viewed from the front.

3. The swinging portion is formed like a thin plate extending from the main body of the launch pad, and the tip of the swinging portion serves as an operating piece.

4. 2. The learning material according to claim 1, wherein the receiving hole has a top edge having a length corresponding to the base end wall, and an inclined side that, together with the top edge, forms a trapezoidal shape in a plan view.

5. A contact portion having the receiving hole is formed on the base end side of the projectile, 5. The learning aid according to claim 4, wherein the lower surface of the contact portion is formed as an arcuate surface or an inclined surface, thereby smoothing the elastic deformation of the oscillating portion.

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